Category Archives: gis

The Search for Timezone Maps

By | Published: October 16, 2008
For a while I had been casually searching for a way to overlay US time zones over a map for a project I was working on. It was never important enough to have a solution that required paying for something so I was searching for some type of government data source.
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Free geocoding

By | Published: May 20, 2006
I've had opertunities to work with a number of different GIS packages in the past (see my post comparing a few). Most of them are great but they all cost a lot of money to use. If you trying to get your feet wet and don't want to spend money on one of the real [...]
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Good Techcrunch review of mapping apis

By | Published: April 18, 2006
Techcrunch has a good review by Frank Gruber of the look and feel of mapping services. I think it is notable that ESRI's service is not included in the review. I think it is at least as good as the mapquest service. I may have to find time to redo my review of the acuracy [...]
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Approximating a circle with a polygon

By | Published: April 18, 2006
I recently had an opportunity to use ESRI's ArcSDE again. It is a spatial database interface and in this instance I was using the java api. I wanted to change what used to be a query using a rectangle into a query using a circle. For some reason parts of the java api for ArcSDE [...]
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GIS Geocoding experiments

By | Published: March 9, 2006
I've been evaluating a couple different mapping software packages recently and the other day I noticed that the same addresses geocoded (for those who don't know what geocoding is you can find out more about it here) to different locations. They are mostly the same but I figured it was interesting enough to do some [...]
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