Archive for the ‘Uncategorized’ Category

Tab Tip – Using the Edge Matching Tool to Accurately Map Adjacent Polygons

December 14, 2009

Among the exciting new GIS components developed for XMap 7 is an ingenious tool for streamlining the process of creating or modifying polygons. The Edge Matching tool, as its name implies, provides an efficient and effective way to automatically match the edge of a polygon with the corresponding edge of its neighbor. In short, this tool saves a lot of duplicated effort when creating adjacent irregular polygons.

To help provide an appreciation of the value of this tool and to describe how it works in a practical sense, we will consider a common application for manual polygon creation: parcel mapping.

If you are lucky enough to play your GIS trade in the vast central section of the United States, property mapping is a relative breeze. Thanks to the Jeffersonian survey system, properties are typically regular, four-sided polygons, stretching as far as the eye can see. Click, click, click, click and you’re ready for the next one. Here in New England, property boundaries tend to be based not on a universal consistent system but on local geographic or hydrographic features such as streams or ridgelines, which do not usually follow straight lines or intersect at right angles.

When mapping adjoining parcels of this type, it is unavoidable that each boundary line must be precisely duplicated to avoid any holes or overlap. This process usually doubles the time and effort needed to create the parcel database—it was for such situations that XMap’s Edge Matching feature was developed.

To use the Edge Matching tool in either the Editor or Enterprise version of XMap, follow these steps.

  1. Create or import the first polygon, making sure it is accurately delineated.
  2. Create a simple version of the adjacent polygon (four points is sufficient).
  3. Click the Edge Matching tool on XMap’s toolbar and click anywhere within the simple polygon.
  4. Select the two shape points at either end of the section of this polygon that will be matched. These anchor points will be symbolized with pink boxes.
  5. Click anywhere within the first polygon and repeat the anchor point selection process for the two points that correspond with ends of the section of the boundary to be matched. A dashed line on the map provides a visual indication as to which of the two previously selected points will be matched. After the second point is selected, the corresponding edge of new polygon will be automatically redrawn and matched to the shape of the original polygon.

The Edge Matching tool not only saves time and effort in polygon mapping projects, it also ensures accuracy in the mapping process by eliminating the likelihood of mismatched or omitted points.

DeLorme Offers Free Downloadable Trial Version of XMap 7 GIS Enterprise Software

December 14, 2009

DeLorme is pleased to announce the availability of a downloadable trial edition of the latest release of its XMap 7 GIS Enterprise software. This thirty-day evaluation copy provides all of the features of the standard Enterprise software version and includes a sample of DeLorme’s topographic base map data.

XMap 7 is a three-tiered GIS software suite that has been engineered to extend the reach of GIS to field technicians and mobile professionals through straightforward two-way data synchronization and form-based data collection and editing.

XMap 7 GIS Enterprise is the most advanced level of the three tiers. It offers offer a full array of GIS importing, editing, and analysis tools as well as powerful data administration and deployment functionality. Using XMap 7 GIS Enterprise, a GIS manager or IT administrator can:

  • Import data in all common spatial formats
  • Create and edit both the geometry and attributes of a layer
  • Classify, symbolize, and query the data.
  • Establish the synchronization process to enable the efficient transfer of selected GIS layers
  • Build data collection forms for use in all versions of XMap 7 or on the Earthmate PN-40 handheld GPS receiver
  • Integrate field-collected data in a master GIS database

To download a free trial copy of XMap 7 GIS Enterprise, visit www.xmap.com/trial.

Also available in the XMap 7 software suite are XMap 7 GIS Editor—a full-featured application offering an extensive set of GIS layer importing, creating and editing tools, ideally suited for small scale GIS operations—and XMap 7 Professional, which is primarily a GIS data viewing application but, when used in conjunction with XMap GIS Enterprise, becomes a proficient field data collection and updating tool, ideally suited for field personnel and other mobile professionals.

XMap at Work

December 14, 2009

Santa Claus travels the world with the Earthmate PN-40

North Pole – The Earthmate PN-40 has proven its mettle in the most demanding physical environments—from the high peaks of the Himalayas to the searing heat of the Sonoran Desert. Yet these extremes pale in comparison to the latest assignment for this indomitable device.

This year, Santa Claus has chosen the PN-40 to help him guide his sleigh as he circumnavigates the globe bringing joy (and DeLorme mapping products) to all.

“Rudolph’s navigational prowess is well known,” said Mr. Claus in a recent interview. “But the red nose is yesterday’s technology. When I heard the Easter Bunny had picked up a PN-40 and had shaved twenty percent off his delivery time, I had to get one.”

Working with his team of IT elves, Mr. Claus used XMap to quickly geocode the location of every child on the planet. In the resulting GIS layer, he added a Naughty or Nice field, with Nice assigned as the default initial value, of course. He then appended the Requested Presents database and even attached a copy of each kid’s Santa letter as an embedded document. Finally, he overlaid this point layer on the new XMap World Base Map data before creating the necessary map packages for his PN-40.

“The forms feature on the PN-40 is what will really make my job easier,” said Mr. Claus while stuffing his sack full of DeLorme Atlas and Gazetteers. “Let’s say I park the sleigh on the roof little Jimmy’s house. I just look down at the screen of my PN and click the symbol and up pops a form with all of Jimmy’s details: Nice–check; Copy of XMap–check. I’m on to the next house before the guys up front have a chance to finish their carrots. I even added a check box to the form to let me know that I’d visited this house. How cool is that? Now, if you’ll excuse me, I really have a lot to do.”

So there you have it, the PN-40 does its part to help bring holiday cheer to kids all over the world.

The XMap Team at DeLorme would like to wish you and yours a happy and healthy holiday season and a peaceful and prosperous New Year.

XMap Q&A—What are the main differences between XMap and Topo USA, and will XMap offer any additional functionality when used with my PN-40 GPS Receiver?

August 12, 2009

Since the introduction of the PN-Series GPS receivers over two years ago, DeLorme’s customer service representatives have helped countless customers determine which of these two software titles best suits their needs. Long-time subscribers to the DeLorme Professional Newsletter may recall that we addressed this same issue in a late 2007 edition; however, as the question is still being posed, it is worth revisiting this topic.

To begin, let us quote from the 2007 article:

“Both XMap 5.2 and Topo USA can be used to transfer maps and data to and from the PN-20, however there are key differences between these two software packages that reflect the intended use for each product.

Topo USA was developed as a recreational mapping software product and it excels for such applications as hiking, biking, hunting and off-road navigation. Combined with the PN-20 it offers a powerful set of tools for planning and undertaking virtually any backcountry adventure.

XMap, which includes all of the features and functions of Topo USA, was designed to specifically meet the needs of the professional user and it achieves this by offering several mechanisms for integrating third party data into the software.”

3D_SLCWhile the XMap and Topo USA have been significantly upgraded since 2007, the fundamental distinctions remain the same. Topo USA is intended for recreational use and XMap has been designed for professional applications.

Both products contain the same core mapping functionality and include many of the same features and functions including routing, drawing and annotation, 3-D terrain modeling and much more. Because there are such similarities and common functionality, the upgrade path is a painless one for Topo USA users who want to take their mapping to the next level.

For most users, XMap Professional—the entry level edition of the suite—is a perfect stepping stone from recreational mapping to more advanced spatial technology. So what data does XMap Professional support that is not compatible with Topo USA?

  • Shapefiles
    The most common GIS file format, shapefiles are freely downloadable from thousands of online data libraries. Shapefiles can depict property boundaries, nesting sites, schools, subway lines or almost any imaginable geographic feature.Subway
  • XMap OpenSpace files
    DeLorme’s GIS format offers a simple way to share data layers with other XMap users. DeLorme provides several free OpenSpace layers for download including Township, Range, and Section boundaries, ZIP Code polygons, and NGS Benchmarks.
  • Scanned or digital versions of paper maps
    Using XMap’s ImageReg tool, you can import an image, such as a scanned map or aerial photograph, and precisely align and scale it to create a geographically referenced map layer.
  • Third-party aerial imagery
    Many national, regional, or local government agencies offer aerial imagery or other raster data at no charge. The most common formats for this imagery are GeoTIFF and MrSID, both of which are supported by XMap. As an example, all of the topographic maps for Canada can be downloaded from the Canadian government and can be viewed in XMap.
  • Your data
    XMap offers a geocoding tool that gives you the ability to import spreadsheets, databases, and even text files that contain a location component, such as a street address or coordinates. Each record is represented by a user-selectable symbol and is positioned at the correct point on the map.

All of these map layers can be transferred to the Earthmate PN-Series GPS receivers and can be displayed alongside DeLorme’s renowned topographic maps and Map Library layers.

XMap also includes a number of functional advances when compared to Topo USA:

  • Phone Search which offers searchable access to over 150 million phone records for the U.S. and Canada.
  • Voice-controlled navigation and voice recognition capability, allowing you to control certain features of the software using verbal commands.
  • Map feature customization including user-selectable contour intervals, shaded relief control, and flexible dual map windows.
  • Advanced layering functionality, allowing selected map features to be displayed on top of aerial imagery

In XMap, you will find all of the features and functions you love about Topo USA enhanced with an array of powerful mapping tools that help you make maps like a pro.

Reseller Spotlight

August 12, 2009

This month, we continue our reseller spotlight feature by looking at a recent addition to DeLorme’s VAR (Value Added Reseller) network. Data Directions, based in Eugene, Oregon, not only offers a full range of DeLorme’s software and hardware but also provides a wealth of expertise in the application of location technology for natural resources professionals.

Tony Cooley, Data Directions Principal, who recently received his Geographic Information Systems Professional certification by meeting the standards for ethical conduct and professional practice as established by the GIS Certification Institute, shares some information about his company.

DDLogoData Directions has been providing Geographic Information Systems (GIS) technology for forestry and natural resources management applications since 1992. Clients are located throughout the Pacific Northwest and manage anywhere from a few thousand to more than a million acres of resources. The solutions provided are tailored to meet the individual client’s needs and often intermix a variety of software and hardware products.   The XMap GIS product line works well as a cost effective, feature-rich solution for the smaller clients and with the addition of the PN-Series GPS units, XMap also fits in well as a component of larger, enterprise-level GIS implementations.

“The PN-Series GPS units coupled with the XMap software enable our clients to view and reference their detailed GIS vector layers, as well as custom imagery in the field.   The ability to load GIS layers for property lines and private road systems onto the GPS units is invaluable,” said Cooley. “The units work quite well under the canopy of the northwest forests.  With the release of the PN-40 ESRI Extension, importing field collected data used for harvest or stand treatment planning is now virtually effortless.  We have found that XMap integrates well into GIS departments which are ESRI or MapInfo based.”

Data Directions provides GIS system software sales, consultations, systems analysis, user support, training, and applications development. Additional services include GIS data acquisition, conversion, creation, and integration. Data Directions specializes in integrating the XMap software and PN-Series GPS units with existing GIS installations or deploying XMap GIS as the primary system for clients with limited budgets. For more information on the services Data Directions performs please visit their web page at: www.datadirections.biz.

If you are interested in the application of XMap within a particular industry, you are encouraged to contact an appropriate Value-Added Reseller directly. If would like more information about becoming an XMap VAR, please contact the XMap team at 1-800-293-2389 or email prosales@delorme.com

Notes from the Director

August 12, 2009

In mid July, Geoffrey Ives, DeLorme’s Director of Professional Sales, flew to San Diego for the 2009 ESRI User Conference along with a number of key DeLorme staff members. DeLorme’s attendance at this event was significant for many reasons, not the least of which was the fact that DeLorme had recently become an ESRI Business Partner. The following was written by Geoffrey shortly after his return.

What I Learned at DeLorme’s First ESRI User Conference

A few weeks ago, DeLorme Publishing Company, Inc., a new ESRI Business Partner, exhibited at the 2009 ESRI User Conference in San Diego. For DeLorme, the conference was a great success and provided the DeLorme professional sales group with hundreds of sales leads for the DeLorme World Base Map data and the Earthmate PN-40 handheld GPS receiver. But, clearly, there was more to the conference than just a list of sales opportunities.

ESRI_UCWe were told that attendance at the conference was down from previous years. That may be or may not be true, but from my perspective (our booth was swamped), the level of attendance— in light of the economic downturn—seemed indicative of the growing acceptance of GIS into mainstream government and business processes.  I’m talking low-level, basement of the rural town hall where you register your car, acceptance here.

DeLorme has exhibited at eight national conferences this year and at all of them, with the single exception of the American Wind Energy Association conference in Chicago, attendance was significantly off.  And they have all been peppered with job seekers and struggling job holders seeking a better life, which means attendees are less interested in stuff to buy and more interested in jobs and new time-saving processes. The ESRI User Conference was no exception.

In the current economic climate, most of us are stretching our daily job parameters to absorb additional tasks and responsibilities. Across the nation, ten percent of us have lost our jobs.  Those of us fortunate enough to retain a job suffer from the need to fill the process vacuums left by the now unemployed or re-employed.  It forces us all to rethink our relationship with work; to reassess our futures, our company objectives, our careers, our family’s security, and the trade shows we attend.

The ESRI User Conference plenary session highlighted multiple and critical global crises, in part to emphasize the positive impact of GIS on disaster management and future planning (let’s face it, unless you’ve got your head in the sand, we’re up against nothing less than planet-wide disaster), but also to target an audience of over twelve thousand with a message of “yes we can” in the face of all this darkness. During the afternoon keynote speeches, I emotionally cycled between ‘springing’ all of the apes from the San Diego Zoo and rushing home to build geospatial models that clearly identify the guilty parties. Of course, the quintessential US consumer (i.e., me) is the guilty party in one way or another. I could check Google for the nearest EZ-Rent-A-Van to the convention center.  Although I’d likely end up in the hospital; a data point within some public safety GIS showing statistically that a middle-aged US professional dad cannot transport arboreal apes in a rented van without risking serious personal injury; my well-intended personal protest not helping orangutans one bit.

“Where exactly was he going with all those primates?,” the responding trooper would ask my wife.

“I really don’t know officer. You see his Blackberry isn’t fully charged. Know what I mean?” she responds, filing her nails. “You should see how he loads the dish washer.”

“We understand Ma’m.”

Leaving the personal drama behind, I spoke with an estimated three or four hundred GIS users during the week. What I heard, again and again, was that many had suggested to their bosses that, due to the economy, they skip the ESRI UC this year. After all, San Diego is “Junket-Land” where, by itself, eating will obliterate a per diem living allowance. What was interesting to me was how so many small organizations, like budget constrained towns, told their GIS people, “No. We want you to go because you always bring back money-saving tools and new ideas.”

That seemed to be the ultimate evidence that GIS has truly become a critical component of mainstream business processes. For a small Maine town to fund a GIS manager’s trip to San Diego for a week is really quite amazing especially in light of shrinking municipal budgets. And for elected officials to recognize the benefits of GIS clearly speaks to the intrinsic value geospatial technology is now expected to provide.

Sure geospatial technology is cool. GPS navigation, on-line parcel maps, satellite views of Nana’s  house—these are all great things—but to generate actionable intelligence out of maps and location data can be life, and hopefully, planet saving.  It’s one thing for a federal agency to recognize GIS benefits through a cadre of analysts applying the best tools in the business but something entirely new to find that GIS value is being touted by an elected official from rural America. GIS benefits are now recognized by smaller jurisdictions through both ROI analysis and plain common sense.

In San Diego I learned that ESRI business partners may actually be part of something bigger than creating and selling product. We’re providing tools that empower solutions to global problems.  To do so we need to survive and flourish as a business community. That means balancing competition with collaboration, taking risks and pushing innovation, sharing and investing, all while developing value for our customers. As businesses, we’re no good to anyone if we don’t survive. So congratulations to those of you surviving this economy. It is no small achievement and we all need all the help we can get.

So perhaps there is hope. That’s what Jack Dangermond’s message seemed to be at the plenary wrap-up. We’re living through a dark time but there is hope, “There’s a light at the end of the tunnel.” GIS as a “Geo-Design” tool, can help educate and inform those in power, from local towns to national governments, to make the critical decisions necessary to help turn our planet around.

The problem, according to Mr. Dangermond, is nothing short of saving our world for our children. Geospatial technology has come of age just in time to help guide and inform the critical decision makers of the world.

Will GIS save the world? Who knows? I know it won’t happen without intelligent planning, cross cultural collaboration, sacrifice and guts. But I have faith that the GIS community at large is better at saving the world than your average, middle-aged dad is at loading the dish washer.

DeLorme Releases Free NGS Benchmark Data for XMap

August 12, 2009

DeLorme is pleased to announce the availability of NGS (National Geodetic Survey) benchmark data for XMap. These OpenSpace files, organized by state, can be downloaded for free and are compatible with all versions of XMap 5 or newer.

Benchmarks1A benchmark is a geographic point whose coordinates and/or elevation has been measured and recorded to a high level of accuracy. Benchmarks are used by surveyors, engineers, map makers, and other professionals who need a highly accurate positional reference for their work. Recently, locating benchmarks has also become a popular pastime for the geocaching community.

Each benchmark or geodetic control station has a precise latitude/longitude used for horizontal control or a precise orthometric height used for vertical control or both a horizontal and vertical control.

The XMap data is comprised of individual OpenSpace layers created for all 50 U.S. states and the District of Columbia, based on data downloaded from the NGS benchmark archive files. Recent benchmark additions can be downloaded directly from the NGS website and appended to the appropriate XMap OpenSpace layer using the Import… Append function of XMap GIS Editor or XMap GIS Enterprise.

The benchmark layers have been classified and symbolized to distinguish horizontal and vertical benchmarks. Additionally, a unique symbol has been assigned to benchmarks that are considered both horizontal and vertical control points. Each layer includes four pre-defined queries that can be run from within the Attribute subtab of XMap: Search by County, Search by ID number, Search by Benchmark name, and Search by USGS Quad. The results of these queries are highlighted on the map and in the attribute table.

Each benchmark includes over 35 attribute fields, including its name, date established, and condition. Additionally, each point on the map is labeled with the benchmark ID number, which also serves as a hyperlink to the complete online datasheet for that control point.

As with all GIS layers in XMap, the benchmarks can be transferred to the PN-Series GPS receivers for field use. On the device, the objects that appear as labeled points on the screen are searchable using the Find function.

The availability of the benchmark data in XMap format is further evidence of DeLorme’s commitment to providing powerful geospatial tools and data in a cost-effective way, making GIS technology accessible to everyone.

The DeLorme Professional Newsletter – Summer Edition

August 12, 2009

SunIf you’re worried that you missed a month of this venerable publication, fear not. This is a combined July/August edition; let’s call it a bumper summer special. Read on to find out about a new free data offering for XMap users, an intro to an XMap reseller in the Pacific Northwest, a rare missive from DeLorme’s Professional Sales Director about his experience at the ESRI User Conference, and, of course, a chance for you to test your geographic knowledge and maybe win a copy of XMap with a GPS receiver in the latest Where on Eartha challenge.

Tab Tip – Building a Query in XMap

June 26, 2009
A version of this article was originally penned for the April 2007 edition of the DeLorme Professional Newsletter. When it was suggested that we include an updated revision for the June 2009 edition, it transpired that most of the original content still applies. So, with apologies to long-time subscribers, the following article is recycled.
The query function, which is included in both the Enterprise and Editor versions of XMap, offers both attribute and spatial querying. Queries are used to quickly identify specific records in your data and to uncover the spatial relationship between objects within different data layers. Note that queries that have been built using Enterprise or Editor are transferred with the corresponding openspace layer or through the synchronization process to users of XMap Professional. However XMap Professional cannot be used to create a query.
Read More…
A query is built by following a few simple steps:
1. After clicking the Query button on the left side of the GIS tab, select the layer to be queried from the Layer drop-down list.
2. Choose an attribute to query by clicking the cell immediately below the Attribute column heading. A drop-down list shows all of the attribute fields for that layer.
Note that the first item on the list is GEOMETRY. Select this option if you are creating a spatial query. This process will be discussed in greater detail below.
3. After selecting an attribute field, select the query Operator from the drop-down list in the adjacent cell. Depending on the data type, query operators may include “CONTAINS”, “IS EMPTY”, <, and =, among others. For instance, a query to find property owners by name within a parcel layer will be set up as follows:
Layer: Tax Parcels, Attribute: Owner, Operator: EQUALS
4. In the next cell, type or select the search criteria, which will reflect the name or value being sought. A drop-down list will offer a sample of the values that are present within the selected attribute field.
Optionally, select the User Input check box and leave the Criteria field blank, which allows unique query criteria to be entered each time the query is run. This function is particularly useful when sharing a layer with a user of XMap Professional either through an openspace file transfer or using the synchronization process as it allows them to customize the search parameters.
5. Use the Logical Operator option to build a more complex query by establishing multiple search criteria either on the same field or on different fields within the layer. For instance, by choosing the AND option, an additional line can be added that further filters the query results. The parcel query might then read like this:
Attribute: Owner, Operator: EQUALS, Criteria: Smith, Logical Operator: AND
Attribute: Value, Operator: > Criteria: 100000
In this case the query would return a list of all of the properties owned by someone named Smith that have a value of grater than $100,000. Additional lines can be added to a query as needed.
The process of building a spatial or geographic query is similar to building an attribute query. Selecting GEOMETRY from the Attribute list, as noted above, offers a unique list of query operators including, “IS CONTAINED BY”, “INTERSECTS”, and “WITHIN A DISTANCE OF”, as well as their inverses. This allows a subset of objects within a layer to be generated based on their spatial relationship to objects in another layer or based on a determined distance from a selected location or from the map center.
A powerful search option is to create a query that is a combination of both spatial and attribute query criteria. Using the parcel example again, the query could be built as follows:
Attribute: Owner, Operator: EQUALS, Criteria: Smith, Logical Operator: AND
Attribute: Value, Operator: > Criteria: 100000, Logical Operator: AND
Attribute: GEOMETRY, Operator: IS CONTAINED BY, Criteria: City School District
In this example the query results would be further limited to those that fall with the City School District polygon as delineated in a second openspace layer.
It is common for the spatial query function to be used in conjunction with XMap’s buffer tool. A buffer is polygon of a user-specified radius created around an object or group of objects within a layer. The Buffer dialog box, which is accessed by clicking the Tools button in the Workspace, offers the option to create buffer areas around all objects in a layer or just those that have been selected or queried.
As an example of the combined use of the buffer and spatial query tools, a pipeline manager can create a map and generate a list of properties that fall within a mile of his pipeline. To accomplish this he would first create his one-mile buffer polygon then build a spatial query as noted above using IS CONTAINED BY as the operator and the newly created buffer layer as the criteria.
The query function is one of the fundamental data management tools within any GIS. In XMap, the combination of buffering, attribute and spatial querying provides an efficient and effective way to filter or highlight critical objects within a layer.
A version of this article was originally penned for the April 2007 edition of the DeLorme Professional Newsletter. When it was suggested that we include an updated revision for the June 2009 edition, it transpired that most of the original content still applies. So, with apologies to long-time subscribers, the following article is recycled.
The query function, which is included in both the Enterprise and Editor versions of XMap, offers both attribute and spatial querying. Queries are used to quickly identify specific records in your data and to uncover the spatial relationship between objects within different data layers. Note that queries that have been built using Enterprise or Editor are transferred with the corresponding openspace layer or through the synchronization process to users of XMap Professional. However XMap Professional cannot be used to create a query.

Query1

A query is built by following a few simple steps:
  1. After clicking the Query button on the left side of the GIS tab, select the layer to be queried from the Layer drop-down list.
  2. Choose an attribute to query by clicking the cell immediately below the Attribute column heading. A drop-down list shows all of the attribute fields for that layer.
    Note that the first item on the list is GEOMETRY. Select this option if you are creating a spatial query. This process will be discussed in greater detail below.
  3. After selecting an attribute field, select the query Operator from the drop-down list in the adjacent cell. Depending on the data type, query operators may include “CONTAINS”, “IS EMPTY”, <, and =, among others. For instance, a query to find property owners by name within a parcel layer will be set up as follows:

    Layer: Tax Parcels, Attribute: Owner, Operator: EQUALS

  4. In the next cell, type or select the search criteria, which will reflect the name or value being sought. A drop-down list will offer a sample of the values that are present within the selected attribute field.
    Optionally, select the User Input check box and leave the Criteria field blank, which allows unique query criteria to be entered each time the query is run. This function is particularly useful when sharing a layer with a user of XMap Professional either through an openspace file transfer or using the synchronization process as it allows them to customize the search parameters.
  5. Use the Logical Operator option to build a more complex query by establishing multiple search criteria either on the same field or on different fields within the layer. For instance, by choosing the AND option, an additional line can be added that further filters the query results. The parcel query might then read like this:

    Attribute: Owner, Operator: EQUALS, Criteria: Smith, Logical Operator: AND
    Attribute: Value, Operator: > Criteria: 100000

    In this case the query would return a list of all of the properties owned by someone named Smith that have a value of greater than $100,000. Additional lines can be added to a query as needed.

Query2The process of building a spatial or geographic query is similar to building an attribute query. Selecting GEOMETRY from the Attribute list, as noted above, offers a unique list of query operators including, “IS CONTAINED BY”, “INTERSECTS”, and “WITHIN A DISTANCE OF”, as well as their inverses. This allows a subset of objects within a layer to be generated based on their spatial relationship to objects in another layer or based on a determined distance from a selected location or from the map center.
A powerful search option is to create a query that is a combination of both spatial and attribute query criteria. Using the parcel example again, the query could be built as follows:
Attribute: Owner, Operator: EQUALS, Criteria: Smith, Logical Operator: AND
Attribute: Value, Operator: > Criteria: 100000, Logical Operator: AND
Attribute: GEOMETRY, Operator: IS CONTAINED BY, Criteria: City School District
In this example the query results would be further limited to those that fall with the City School District polygon as delineated in a second openspace layer.
It is common for the spatial query function to be used in conjunction with XMap’s buffer tool. A buffer is polygon of a user-specified radius created around an object or group of objects within a layer. The Buffer dialog box, which is accessed by clicking the Tools button in the Workspace, offers the option to create buffer areas around all objects in a layer or just those that have been selected or queried.
As an example of the combined use of the buffer and spatial query tools, a pipeline manager can create a map and generate a list of properties that fall within a mile of his pipeline. To accomplish this he would first create his one-mile buffer polygon then build a spatial query as noted above using IS CONTAINED BY as the operator and the newly created buffer layer as the criteria.
The query function is one of the fundamental data management tools within any GIS. In XMap, the combination of buffering, attribute and spatial querying provides an efficient and effective way to filter or highlight critical objects within a layer.

XMap Q&A – My company has a well established GIS; why would we need XMap?

June 26, 2009

 

One of the recurring themes that you will often read in DeLorme’s XMap informational literature is that XMap is equally well suited as a standalone GIS application or as an extension to your existing GIS infrastructure. As XMap continues to evolve, more and more emphasis is being placed on improving the interoperability with third-party GIS software and databases and on simplifying the exchange of data between the different platforms. Seen in this light, XMap functions as a bridge between your current GIS setup and those who need access to the data on an ongoing basis, namely your field staff or mobile workforce.
Before considering this question in the context of the current versions of XMap, it is worth taking a look back at DeLorme’s first venture into the world of GIS in the early versions of XMap.
DeLorme’s strength in the field of mapping technology has always been founded on the inherent mobility of its software. Companies with large field-based workforces were quick to recognize this and were equally quick to ask for additional functionality to support their field operations. One of the most frequent requests was for a tool to integrate corporate GIS datasets into this mobile mapping platform. DeLorme acquiesced with the release of XMap version 3, which offered a simple function for importing shapefiles as draw layers. The intention of this feature was simply to provide an easy-to-use and affordable means to display GIS data in the field. For this reason, the early versions of XMap were particularly appealing to GIS administrators.
Read More…
Since those early days, XMap’s development has followed two paths. A vast array of functionality has been added to allow XMap to serve as a self-contained spatial data management tool, typically for relatively small scale operations. Concurrently the XMap development team has spent a considerable amount of time designing the efficient data distribution capability that has been adopted by numerous large-scale GIS departments.
XMap is not intended as a replacement for your current GIS software, instead it adds value to your GIS investment by extending its reach. In the office, the Enterprise version of XMap is used to import and stage your data in preparation for distribution. It can even pull layers directly from your ArcSDE databases. XMap’s integrated Database Manager application is then used to set up the subscription process by which selected layers will be assigned to an individual or group as appropriate. 
In the field, the Professional version of XMap provides easy, read-only access to these GIS layers with a simple click of a button. This synchronization process is initiated by the field user and it ensures that they have the latest version of each layer to which they are subscribed.
Perhaps the most appealing function of the XMap suite for GIS administrators is the redlining tool that is included in XMap Professional. As a component of the synchronization process, this easy-use-annotation feature allows field workers to communicate with their GIS administrator using a variety of markup tools. These redline layers are automatically delivered to the central database with each synchronization, allowing the data administrator to correct or update the master layers as necessary.
Most GIS managers will agree that a fully functional GIS is one in which all vested parties have access to the necessary data. XMap can play a key role in this process by simplifying the distribution of data and by providing an easy-to-use and affordable GIS viewer for field operatives.
Telecom_1One of the recurring themes that you will often read in DeLorme’s XMap informational literature is that XMap is equally well suited as a standalone GIS application or as an extension to your existing GIS infrastructure. As XMap continues to evolve, more and more emphasis is being placed on improving the interoperability with third-party GIS software and databases and on simplifying the exchange of data between the different platforms. Seen in this light, XMap functions as a bridge between your current GIS setup and those who need access to the data on an ongoing basis, namely your field staff or mobile workforce.
 
Before considering this question in the context of the current versions of XMap, it is worth taking a look back at DeLorme’s first venture into the world of GIS in the early versions of XMap.
 
DeLorme’s strength in the field of mapping technology has always been founded on the inherent mobility of its software. Companies with large field-based workforces were quick to recognize this and were equally quick to ask for additional functionality to support their field operations. One of the most frequent requests was for a tool to integrate corporate GIS datasets into this mobile mapping platform. DeLorme acquiesced with the release of XMap version 3, which offered a simple function for importing shapefiles as draw layers. The intention of this feature was simply to provide an easy-to-use and affordable means to display GIS data in the field. For this reason, the early versions of XMap were particularly appealing to GIS administrators.
 
Since those early days, XMap’s development has followed two paths. A vast array of functionality has been added to allow XMap to serve as a self-contained spatial data management tool, typically for relatively small scale operations. Concurrently the XMap development team has spent a considerable amount of time designing the efficient data distribution capability that has been adopted by numerous large-scale GIS departments.
 
XMap is not intended as a replacement for your current GIS software, instead it adds value to your GIS investment by extending its reach. In the office, the Enterprise version of XMap is used to import and stage your data in preparation for distribution. It can even pull layers directly from your ArcSDE databases. XMap’s integrated Database Manager application is then used to set up the subscription process by which selected layers will be assigned to an individual or group as appropriate. 
 
In the field, the Professional version of XMap provides easy, read-only access to these GIS layers with a simple click of a button. This synchronization process is initiated by the field user and it ensures that they have the latest version of each layer to which they are subscribed.
 
RedlinePerhaps the most appealing function of the XMap suite for GIS administrators is the redlining tool that is included in XMap Professional. As a component of the synchronization process, this easy-use-annotation feature allows field workers to communicate with their GIS administrator using a variety of markup tools. These redline layers are automatically delivered to the central database with each synchronization, allowing the data administrator to correct or update the master layers as necessary.
 
Most GIS managers will agree that a fully functional GIS is one in which all vested parties have access to the necessary data. XMap can play a key role in this process by simplifying the distribution of data and by providing an easy-to-use and affordable GIS viewer for field operatives.

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