Questions tagged [gdal-polygonize]

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1answer
63 views

gdal_polygonize not converting raster values

I am trying to convert a weather radar geoTIF to geoJSON using gdal_polygonize. I am sharing the original .tif on google drive : https://drive.google.com/file/d/1p2eE0QUtNypNjs5Qb9JBfXrDdMd8Ifpb/view?...
0
votes
1answer
28 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
42 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
70 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
79 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
2k 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 ...