A thematic map is a type of map or chart especially designed to show a particular theme connected with a specific geographic area.

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openlayers 2 coloring a polygon layer based on a database ( postgresql ) table that is different from the attribute table of the layer

i have trouble coloring the polygons in my layer based on the values in certain field in another table in my postgresql database that is different from the attribute table of the layer itself , is ...
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PostGIS Unknown colormap keyword

I'm working with thematic maps with ST_ColorMap function smoothly until I try to create my own thematic map(colormap). WITH canvas AS ( SELECT ST_Raster( ...
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Setting border-style to 'no pen' using QgsGraduatedSymbolRendererV2

I am developing a QGIS plugin that, after a series of inputs, will produce a thematic map using the QgsGraduatedSymbolRendererV2. Because the polygon are very small, the boarders make it such that ...
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Overviews for thematic raster maps

I have a landuse raster map with integer classes (1:agricultura, 2:pasture, etc). I'm trying to publish it through GeoServer and I'd like to use image overviews to speed things up. I tried gdaladdo ...
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Displaying directional bandwidths in QGIS

I have a traffic model and want to display the results in QGIS. I have a shapefile for the road network and can easily annotate the flows onto this. However, I want to display the information as ...
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Map Info: Thematic Mapping Symbols part printing

I have produced a series of thematic maps for graduated housing figures, using a symbol which I customized, in three different tables displayed in a layout. This looks fine in the map window, ...
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Is it possible to automatically create categories with mapserver?

I have a mapfile connecting to a postgres/postgis database. To create a thematic map I can set a class item and a number of classes, for example: CLASSITEM "aantal" CLASS NAME "0" ...