ToGeoJson and ToWKT for the Esri FGDB API

In support of some of our ongoing PIM work, we’ve been integrating the Esri File Geodatabase (FGDB) API into some tools. Without going into a level of detail that would hijack this post, one of the many functions performed by some of the tools is to validate physical spatial databases against established data models to analyze compliance and identify differences. These databases may be in Esri or non-Esri formats and we have traditionally handled Esri geodatabases through ArcObjects since it provides a relatively uniform interface across the various flavors of geodatabase.

Of course, ArcObjects requires an ArcGIS license of some sort and we are finding out that this is not always available to users in the field under many situations so the FGDB API gets past that for file geodatabases, at least.

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Using GeoIQ Analytics in .Net Applications

A few weeks ago, I posted about some .Net wrappers I created for the GeoIQ API. Due to ongoing project work, I have continued to extend them by adding methods to wrap GeoIQ analytical capabilities. Despite the recent acquistion of GeoIQ by Esri, it’s my understanding that GeoCommons and existing GeoIQ installations will continue for some time. That’s good, because analytics on the GeoIQ platform are powerful and fairly easy to use. This post will demonstrate how to use analytics in a .Net application.

As previously posted, the .Net wrappers can be found on github here.

The GeoIQ platform offers several functions to analyze data sets hosted on a GeoIQ instance or GeoCommons. I have not yet wrapped all of the functions but am working my way through them as I can.

For this post, I will intersect the locations of US GISPs as of 1/26/2011 with the Maryland Zip Code Boundaries to produce a data set containing the locations of GISPs in Maryland, depicted in the map below.

Don’t worry, none of these are me.

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GeoIQ API Wrappers for .Net

A while back, I built a small interface between GeoIQ/GeoCommons and ArcGIS Desktop. From there, it became more of a full-fledged toolbar for ArcGIS. During that effort, I began developing some .Net classes to wrap the GeoIQ RESTful API. As we progressed with the toolbar, my colleague Hugo Estrada also contributed to the library.

The original intent was to wrap the entire API but it turns out that we were undertaking this in the middle of GeoIQ’s upgrade to version 2.0. In the intervening time, we got some projects implementing the GeoIQ platform for end users (such as the Climascope portal that Andrew Turner recently blogged about).

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MapWindow Open-Source Conference Coming Up

Thanks to Twitter, I see that the 3rd annual MapWindow Open-Source GIS Conference is coming up at the end of June. It is being held in Velp, The Netherlands. I call this conference out because it has a strong, but not exclusive, concentration on open-source GIS tools for the .Net environment, such as DotSpatial, SharpMap, … Read more

Importing Data From GeoCommons Into ArcMap

UPDATE: The code for this post is available at the bottom of the page.

I have been doing a lot of development with the ESRI Silverlight API recently. One of the requirements of my project is to be able to dynamically add KML data at runtime. The incorporation of KML was handled for us through one of the ESRI samples on the resource center so we pretty much just had to integrate that code and test against our use cases. For testing, I typically reached out to GeoCommons since any data set available there can be streamed as KML.

Obviously, this is not my first exposure to GeoCommons but, when discussing it, I found that many of the analysts I spoke with were not aware of it and did not use it much. So I decided to tackle developing a simple ArcMap extension to allow a user to search GeoCommons and then download/add data to ArcMap without the need to manually download, unzip and add the data themselves.

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Browsing WeoGeo Market Using the ESRI Silverlight API

Updated: This demo application now running here. I will update this demo periodically, as time permits, so keep checking back.

At the 2010 ESRI Federal User Conference, WeoGeo announced the availability of a toolbar for interacting with WeoGeo Market and private libraries from within ArcMap. This, combined with Dan Dye’s series of posts showing how to use the WeoGeo REST API with Python got me thinking about how easy it would be to integrate with ESRI’s clients for the ArcGIS Server REST API. All of my clients (it seems) are using the Silverlight API these days so I am spending a lot of time with it and decided to use it as my testbed.

My goal was simple, I wanted to browse the WeoGeo Market for any data sets in the current map extent, be able to select one from a list, and have its preview image display in the proper location on my Silverlight map.

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MSDN Article on Mapping with WPF

I found this article today about using VB9 and WPF to draw thematic maps. It’s a good walk-through of how to do it. The article admits that the coordinate transformation used is not terribly accurate but that can be rectified. This article is a good example of how to build a mapping application without any … Read more