[Qgis-user] Geometry errors while polygonizing raster data

[Atharva Raykar]

Correction: The version I am using is 3.4 LTS.

On Fri, Apr 10, 2020 at 9:23 PM Atharva Raykar <raykar.ath at gmail.com> wrote:

> Hello,
>
> 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 with negative areas.
> So much so that the data is highly inaccurate, and some categories are
> having negative areas with x^10 sq. meters in magnitude.
>
> The features basically resemble the ones I found in this stack overflow
> answer: https://gis.stackexchange.com/a/243707/161470 , where the holes
> are located outside the geometry and are larger than the geometry itself.
>
> How do I troubleshoot this? Is this a bug with QGIS?
>
> I'm using QGIS 3.14 LTS.
>
>
>
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