In support of some of our ongoing PIM work, we’ve been integrating the EsriFile 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.
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.
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). Continue reading “GeoIQ API Wrappers for .Net”
I find myself pointing people to GeoCommons for data more often these days. With over 50,000 data sets, there’s a lot there. The people I work with seem to usually be able to find data of value there so I’ve been putting a little time into making it easier to get data from GeoCommons. As I’ve mentioned before, many of them are long-standing ESRI users. While they are becoming more aware of alternate tools and data sources, it is still important for them to be able to get data into the ESRI environment where their custom tools reside.
Given the content of my recent posts, it’s no secret that my recent project work has involved the ESRI Silverlight API so I decided extend it to more easily access data from GeoCommons.
Recently, GeoIQ pubished an update to their RESTful API that includes a “Features API,” which gives you a little more direct access to the features in a GeoIQ data set (GeoIQ is the platform upon which GeoCommons is built). Previously, if I needed to access data from GeoCommons in the ESRI Silverlight API, I would just access it as KML using the native KmlLayer class. The GeoIQ Features API, however, offers more fine-grained control over how much data we return in the form of various query parameters. Currently, the API only returns JSON (GeoIQ’s own syntax or GeoJSON) so it was time to do something different.
In a previous post, I mentioned that I developed a MeasureString function for use in developing an annotation tool. In this post, I’ll go into a little bit more detail about that tool. For purposes of discussion, I extended the interactive graphics sample from the Esri Silverlight API interactive SDK.
For starters, I added another tool to the sample’s tool bar (circled in red below) to provide access to the annotation capability.
Despite recent news regarding Silverlight, I expect some of my projects to continue using it for the near term. Others may be taking the same tack, so I thought I’d go ahead and offer this up.
Several of the projects I support have the requirement to periodically refresh specific layers in order to track change or movement. These layers can range from weather to vehicle locations and such. I have typically accomplished this with a timer that refreshes the layer(s) on a specified interval. This can get rather cumbersome if you have different layers that require different refresh intervals.