Monday, February 27, 2012

C# code snippet to determine if a point is in a polygon

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A common test in GIS is to determine whether a point is inside a polygon or not. The following C# code snippet can determine whether a poin...
1 comment:
Monday, February 20, 2012

Simple method to count trees using Saga GIS

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It is possible to make a rough estimation of the number of trees in an area from LiDAR derived digital surface (DSM) and digital terrain mod...
14 comments:
Monday, February 13, 2012

Simple canopy height derivation using Global Mapper

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The forest canopy height is the height of the highest vegetation above the ground level. It is possible to calculate the canopy height from...
Monday, February 6, 2012

Google Mapplet for State Plane Coordinate System readout

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The State Plane Coordinate System (SPCS) is a map coordinate system commonly used in the United States. Most SPCS zones are based on the ...
Monday, January 30, 2012

Google Mapplet for showing UTM grid zones

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The Universal Transverse Mercator (UTM) coordinate system is a grid based system for specifying locations on the earth's surface. UTM c...
2 comments:
Monday, January 23, 2012

Join a spatial table with a non-graphical table in gvSIG

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It is very useful to join a geospatial feature with a related non-graphical database table for analysis. This is a common feature found in c...
Monday, January 16, 2012

Connect to non-graphical tabular database data in gvSIG

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Being used to commercial GIS software, I was looking around for the option to connect to a non-graphical database table in the gvSIG OADE 20...