A library providing vector geometry services

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How to get full 16 bits range using RasterSymbolizer and ColorMap ramp?

I am attempting to get the full 16 bits values of my DEM (stored as TIFF files) rendered in WMS tiles (png format). For this I use GeoServer 2.5 and a RasterSymbolizer with a ColorMap of type "ramp". ...
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Why does polygon.intersection(complex_linestring) split the linestring and mess up Z?

I have a complex (self crossing) line with Z values which I'd like to truncate to the area inside a box. The problem is Shapely splits the line into simple (non-crossing) sections and the Z value at ...
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428 views

Get the distance between 2 WGS84 GEOSGeometries

I currently want to check if 2 given GEOSGeometry objects of type Point are within 100m of each other. (length flexible) Looking at previous asked questions on this topic, most of the answers were ...
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74 views

GEOS: how to access Noder functionality through the C API

All this stuff looks rather useful: http://geos.osgeo.org/doxygen/classgeos_1_1noding_1_1Noder.html However, from the GEOS README file: The C++ interface should not be used directly; the geos ...
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Pointers to open source C/C++ code for converting Lat/Lon data into geo-spatial indices in a triangular or hexagonal grid?

I have a streaming data application which needs equal area geo-spatial indexing of input Lat/Lon observational data for locality of referencing. From reading, it would seem that a triangular or ...
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120 views

GEOS assertion failed

The following script fails, if I import the 'rasterstats' library. import rasterstats import ogr geom1 = ogr.CreateGeometryFromWkt('POLYGON ((415924.806155724043492 ...