On 2013-10-21 14:46, Paul Meems wrote:
I'm trying to understand how gdal_rasterize works.
As a test I'm trying to convert a shapefile with all counties of the USA
to a GeoTiff.
I've added a field to the shapefile called myID which is equal to the
shape number.
The goal is to create a tiff with each county its own value.
This is my command:
gdal_rasterize -a myID -l counties -of GTiff -a_nodata -999 -ts 800 800
counties.shp GDALRasterizeTest.tif
You could drop "-of GTiff" as GTiff is anyway the default format.
"-a_nodata -999" makes most sense in combination with "-init -999".
Anything else looks fine to me.
I'm having trouble understanding the -ts or -tr parameters.
Using the above command I get an 800*800 tiff which shows the USA, but
it looks like all pixels are the same color.
-ts obviously sets the output file size, to 800x800 pixels, as you noted
yourself. Do all pixels also have the same *value* ?
Hermann
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