Alexander,
I didn't understand your requirements correctly I think PostGIS can help you
with the aggregation with just a few SQL commands. If you want to do it
programmatically, you have to loop through the layer's features and add up
all the linestrings into a multilinestring according to your cr
Hello there,
I want to use the GDAL-function 'GDALContourGenerate' to construct highlines.
Furthermore I make use of the OGRLayerH which should save the the
vector-data-output (the result) of the function called above.
I've read the OGR API Tutorial page (http://www.gdal.org/ogr/ogr_apitut.h
