[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 Télecommunication à l'INSAT ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
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
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 style from the special field named OGR_STYLE. [1]: http://www.gdal.org/ogr/ogr_sql.html On Mon, Oct 22, 2012 at 2:25 PM, Wael Tarhouni waelin...@gmail.com wrote: 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 Télecommunication à l'INSAT ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
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 -- Michael Smith US Army Corps Remote Sensing GIS/Center From: Wael Tarhouni waelin...@gmail.com Date: Monday, October 22, 2012 4:55 AM To: gdal-dev@lists.osgeo.org gdal-dev@lists.osgeo.org Subject: [gdal-dev] Convert kml to Shapefile and conserve polygon's colors with Ogr2Ogr Resent-From: Michael Smith michael.sm...@usace.army.mil 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 Télecommunication à l'INSAT ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[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. I was thinking it would be a bit more like gdal_contour which uses an interval. Am I not understanding the purpose of gdal_polygonize? Can somebody tell me some real-life use cases when to use this? Thanks, Paul ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[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 to create a feature containing a *previously calculated**polygon like this: OGRFeature* feature = OGRFeature::CreateFeature(testLayer-GetLayerDefn()); feature-SetGeometry(myPolygon); OGRErr errorCode = testLayer-CreateFeature(feature); The line 'testLayer-CreateFeature(feature)' fails returning the error code: OGRERR_UNSUPPORTED_GEOMETRY_TYPE 3 What am I missing here? How can I make my geometry type supported? Any clues? Maybe I have to set the geometry type somehow somewhere else (on the layer or the geometry definition)... I don't know... *(*) *FYI, 'myPolygon' is generated with the Intersection of other 2 Polygons OGRGeometry *myPolygon = basinPolygon-Intersection(landscapePolygon); Thanks in Advance, Best Regards, Hugo Benício. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
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 rasters. Ari ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
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 correctly change the geometry type of my geometry (from *wkbGeometryCollection *to *wkbPolygon*)? * * Thanks in advance, Hugo Benício. * * On Mon, Oct 22, 2012 at 11:24 AM, Hugo Benicio hbobeni...@gmail.com wrote: 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 to create a feature containing a *previously calculated**polygon like this: OGRFeature* feature = OGRFeature::CreateFeature(testLayer-GetLayerDefn()); feature-SetGeometry(myPolygon); OGRErr errorCode = testLayer-CreateFeature(feature); The line 'testLayer-CreateFeature(feature)' fails returning the error code: OGRERR_UNSUPPORTED_GEOMETRY_TYPE 3 What am I missing here? How can I make my geometry type supported? Any clues? Maybe I have to set the geometry type somehow somewhere else (on the layer or the geometry definition)... I don't know... *(*) *FYI, 'myPolygon' is generated with the Intersection of other 2 Polygons OGRGeometry *myPolygon = basinPolygon-Intersection(landscapePolygon); Thanks in Advance, Best Regards, Hugo Benício. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
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 hbobeni...@gmail.com wrote: 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 correctly change the geometry type of my geometry (from *wkbGeometryCollection *to *wkbPolygon*)? * * Thanks in advance, Hugo Benício. * * On Mon, Oct 22, 2012 at 11:24 AM, Hugo Benicio hbobeni...@gmail.comwrote: 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 to create a feature containing a *previously calculated**polygon like this: OGRFeature* feature = OGRFeature::CreateFeature(testLayer-GetLayerDefn()); feature-SetGeometry(myPolygon); OGRErr errorCode = testLayer-CreateFeature(feature); The line 'testLayer-CreateFeature(feature)' fails returning the error code: OGRERR_UNSUPPORTED_GEOMETRY_TYPE 3 What am I missing here? How can I make my geometry type supported? Any clues? Maybe I have to set the geometry type somehow somewhere else (on the layer or the geometry definition)... I don't know... *(*) *FYI, 'myPolygon' is generated with the Intersection of other 2 Polygons OGRGeometry *myPolygon = basinPolygon-Intersection(landscapePolygon); Thanks in Advance, Best Regards, Hugo Benício. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
