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2009-03-12T09:57:37.770
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2010-02-11T17:44:09.030
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MarkJ
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"Dividing some some bounding box into a grid, and displaying each square of the grid using a different color based on how many points of a sample fall within that grid square." This is a raster and there are <a href="http://geoserver.org/display/GEOSDOC/RasterSymbolizer" rel="nofollow noreferrer">features</a> in GeoServer for displaying these with colour shading, legends and so on. I think it will be more flexible to use these features than to create image tiles in C#. From the GeoServer documentation: <blockquote> Raster data is not merely a picture, rather it can be thought of as a grid of georeferenced information, much like a graphic is a grid of visual information (with combination of reds, greens, and blues). Unlike graphics, which only contain visual data, each point/pixel in a raster grid can have lots of different attributes, with possibly none of them having an inherently visual component. </blockquote> This is also called thematic mapping or contour plots or heatmaps or 2.5D plots in other GIS packages. You could use a free GIS like <a href="http://grass.osgeo.org/" rel="nofollow noreferrer">Grass</a> to <a href="http://grass.osgeo.org/gdp/html_grass63/r.resamp.interp.html" rel="nofollow noreferrer">create</a> the raster grids, but from your description you don't need to interpolate (because every cell contains at least one point) so it might be just as easy to roll your own code. EDIT: there is an open source library <a href="http://www.gdal.org/" rel="nofollow noreferrer">GDAL</a> which you can use to write raster files in <a href="http://www.gdal.org/formats_list.html" rel="nofollow noreferrer">various formats</a>. There are C# bindings.
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1. POGenerating Geo-Referenced Images in C#
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1. COExcellent resources, thank you. This is the info I was after.
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