Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections

2011-08-05 Thread Etienne
___ From: Chaitanya kumar CH To: Etienne Cc: "gdal-dev@lists.osgeo.org" Sent: Friday, August 5, 2011 9:46:03 AM Subject: Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections I suggested the -where option because your

Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections

2011-08-05 Thread Chaitanya kumar CH
sed later, presumably). > I would prefer to have the most representative value, any hints? > > many thanks, Etienne > > -- > *From:* Chaitanya kumar CH > *To:* Etienne > *Cc:* "gdal-dev@lists.osgeo.org" > *Sent:* Friday, August 5, 2011 4:

Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections

2011-08-05 Thread Etienne
, any hints? many thanks, Etienne From: Chaitanya kumar CH To: Etienne Cc: "gdal-dev@lists.osgeo.org" Sent: Friday, August 5, 2011 4:22:10 AM Subject: Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersec

Re: [gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections

2011-08-05 Thread Chaitanya kumar CH
Etienne, Rasters of type Byte cannot hold values below 0. So, the nodata value of -1 is not practical. It's better to choose 0 or 255 depending on your data or choose a different data type. Your problem arises because the two geometries in the shapefile overlap in some places and leave some gaps

[gdal-dev] problem rasterizing categorical data from shapefile - 0 values at some intersections

2011-08-04 Thread Etienne
Hi all, I am trying to create a raster file with categorical data (land vegetation/cover positive indices) from a shapefile containing 1 layer of polygons.   I use the following command:  gdal_rasterize  -tr 0.0005 0.0005  -a_nodata -1 -of GTiff  -a_srs EPSG:4618 -a "CLASSE_ID" -ot Byte -init