Questions tagged [gdal-polygonize]
The gdal-polygonize tag has no usage guidance.
5
questions
0
votes
1answer
16 views
Gdal_polygonize and gdaltindex error
I'm trying to convert .tif file to .geojson using following cmd:
gdal_polygonize.py flowdirection.tif -f "ESRI Shapefile" flowdirection_shp.shp
After which I'm getting error:
Program '...
1
vote
1answer
28 views
Converting .tif files to vector MBTiles by using gdal_polygonize
I am trying to use GDAL 2.2.2 and the gdal_polygonizecommand to convert a TIF into vector MBtiles from the link:
https://github.com/geostarters/gdal_snipets
I run the following command on the tif as ...
1
vote
0answers
42 views
gdal_polygonize slow
I am trying to convert 1400 tiff files to GeoJson..tif file size ranges from 20 mb to 1Gb.
gdal_polygonize.py is taking 24 hours for Big files 5 hours for small files.
Any way to improve performance?
0
votes
0answers
67 views
Negative areas after polygonize in QGIS
I have been trying to convert this raster data using QGIS's Polygonize function: https://daac.ornl.gov/VEGETATION/guides/Decadal_LULC_India.html
The converted geopackage is returning many geometries ...
4
votes
2answers
1k views
Converting raster pixels to polygons with GDAL python
I want to convert raster pixels to vector polygons as below image that is output of "Processing Toolbox--> Vector Creation--> Raster pixels to polygons" in QGIS 3.8:
I tried to do this vectorize with ...
