Re: [gdal-dev] Can't create feature on layer for polygon

For anyone else having the same problem like mine, I solved my issue just iterating over the wkbGeometryCollection, gathering all polygons in it and creating a feature for the my layer for each of them. On Mon, Oct 22, 2012 at 1:31 PM, Hugo Benicio wrote: > Ok, I've discovered that myPolygon has

Re: [gdal-dev] Can't create feature on layer for polygon

Ok, I've discovered that myPolygon has geometryType *wkbGeometryCollection.* When I try to: newDataSource->CreateLayer("test",NULL, *wkbGeometryCollection*, NULL); it fails and returns NULL. So my question now is: How do I create a wkbGeometryCollection layer (if possible) or how do I correctl

Re: [gdal-dev] How to use gdal_polygonize.py

Thanks Ari, Travis mailed me the same info. I understand better now. I'm using the data from http://www.fao.org/geonetwork/srv/en/metadata.show?id=37139&currTab=distributionnow to test and it is much more clear. Here in The Netherlands we mostly have land classification already in vector, that's

Re: [gdal-dev] How to use gdal_polygonize.py

On 10/22/2012 12:38 PM, Paul Meems wrote: Am I not understanding the purpose of gdal_polygonize? Can somebody tell me some real-life use cases when to use this? Land cover classification rasters can have large areas of the same (integer) value. I've used the GDAL polygonize code for such rast

[gdal-dev] Can't create feature on layer for polygon

Hi guys! I'm trying to create a shapefile containing a single polygon, but unfortunately I'm facing an error that I have no clue how to solve. I'm successfuly creating a datasource and a layer with: OGRLayer* testLayer = newDataSource->CreateLayer("test",NULL, wkbPolygon, NULL); Then when I try

[gdal-dev] How to use gdal_polygonize.py

Hi all, I'm investigating gdal_polygonize.py I'm thinking of using it to convert a DEM-file to a polygon shapefile. I did a quick test using gdal_polygonize.py logan.tif -f "ESRI Shapefile" logan_poly.shp and got a shapefile. But this shapefile is huge, it created a polygon for every pixel value.

Re: [gdal-dev] Convert kml to Shapefile and conserve polygon's colors with Ogr2Ogr

Wael, First, make sure you are using the libkml driver and not the kml driver. The libkml driver can read the style information. Then you can get that information in your shapefile by specifically requesting the ogr_style column. Try adding -sql 'select *, ogr_style as style from Layer0' Mike

Re: [gdal-dev] Convert kml to Shapefile and conserve polygon's colors with Ogr2Ogr

Wael, There is no support for style information in shapefile format. However, you can store the style info as a regular attribute value. Using OGR's SQL you can extract the style string from the kml data and then store it in the shapefile. Please go through the OGR SQL page[1]. You can get the sty

Re: [gdal-dev] Convert kml to Shapefile and conserve polygon's colors with Ogr2Ogr

Hi There is no graphical representation in the shapefile. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev

[gdal-dev] Convert kml to Shapefile and conserve polygon's colors with Ogr2Ogr

Hi All, I'm using Ogr2Ogr to convert kml file to shapefile but the color of the shape output file is unique, i 'm always loosing the colors of my polygons in the shapefile... is there any way to solve this problem ? Best regards; -- Wael Tarhouni Élève ingénieur en Réseaux informatiques et Té