Finding Street Intersections in PostGIS

I recently had a colleague approach me needing a street intersection search added to our enterprise REST web services. I hadn’t really thought of it before, but it didn’t seem too difficult. I figured out some SQL and ra

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Mashup/Open Source Workshop

As we did last year, Nianwei Liu from the City of Charlotte and I did a workshop at the GIS in the Carolinas Conference, which is a joint conference put on by Carolina URISA and Carolina GITA. We added a lot of material

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LHC in Google Earth

If you’re a hard-core scifi fan like me, you’ve probably been following the Large Hadron Collider with some interest. What’s not to like about a 27km particle accelerator smasing stuff together at nearly the speed of lig

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Google Joins the Browser Wars

Unless you’re living under a rock, you’ve heard about Google Chrome, Google’s new web browser and its biggest foray into the browser wars. I’ve been using it for a few days, and I’m really impressed.The main thing to lik

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Google Gears Geolocation API

I spotted this on the All Points Blog. Google Gears is an open source project that allows you to run web applications while you’re offline. It basically caches data in a SQLite database and has a local store to cache thi

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OpenLayers with a Google Street View Widget

Last month I posted about OpenLayers with a Virtual Earth Widget. I had a business need for that one. This one I’m doing just because I darn well can. First things first - you’ll have to reference the Google Maps API, wh

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Using Lazy Loading to Speed Page Load

Recently I added some Virtual Earth and Google Maps functionality to one of my sites. This requires loading some hefty JavaScript libraries, which I did in the usual way: <script type="http://dev.virtualearth.net/mapc

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Fire Eagle - The GPS Ankle Bracelet for The Rest of US

In the continuing march of location-aware web applications, Yahoo! released their Fire Eagle service. What is that you ask?Fire Eagle is a site that stores information about your location. With your permission, other ser

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How to Make Screencast Tutorials

* NOBODY READS YOUR HELP DOCUMENTATION * Don't believe me? If you have online help, knock it offline. If you have desktop software with a .chm or whatnot, rename the file or replace it with an empty one. See how long it

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Creating Virtual GIS Appliances with Ubuntu JeOS

Some time ago our team met with a 10 county coalition of emergency response and management groups. We identified two general GIS needs for the coalition: the need for seamless GIS data sets across county boundaries, and

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