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About Me
Martin Davis
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Popular Posts
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One of the most useful OGC standards is their specification of the Dimensionally-Extended 9 Intersection Model for spatial relationships. ...
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A common requirement in spatial processing is to union a set of polygons together. Depending on the use case, the polygons may either be a ... -
The geo-blogosphere has been buzzing about the global Facebook friends visualization . This was done by Paul Butler using an R script and ...
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After this thread on the JTS list Michael Bedward was inspired to create a polygon triangulation algorithm using the Ear-Clipping approac... -
Recently I've been doing some work with the General Transit Feed Specification (GTFS). This is a simple data model initiated by Google... -
OpenLayers provides the useful WMSGetFeatureInfo control. It's designed to work with the standard WMS GetFeatureInfo request. As per ...
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Permutations are a fundamental concept in discrete mathematics, and crop up in numerous places in computer science. The set of all possible...
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In my last post I talked about the request on the PostGIS list for a function to generate dot-density maps, and about a JTS class to imple... -
Recently I've been working on generating surfaces from irregular sets of data observations, for thematic rendering purposes. The data I... -
Recently I fixed the JTS KD-Tree implementation so that it works as advertised with a distance tolerance to provide point snapping. This ...
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Books
Blog Roll
- Binstock on Software
- Bitworking
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- Clever Elephant
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