<div dir="ltr"><div dir="ltr"><div>Hello,</div><div><br></div><div>I have been trying to convert this raster data using QGIS's Polygonize function: <a href="https://daac.ornl.gov/VEGETATION/guides/Decadal_LULC_India.html" target="_blank">https://daac.ornl.gov/VEGETATION/guides/Decadal_LULC_India.html</a></div><div><br></div><div>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.</div><div><br></div><div> The features basically resemble the ones I found in this stack overflow answer: <a href="https://gis.stackexchange.com/a/243707/161470" target="_blank">https://gis.stackexchange.com/a/243707/161470</a> , where the holes are located outside the geometry and are larger than the geometry itself.<br></div><div><br></div><div>How do I troubleshoot this? Is this a bug with QGIS?</div><div><br></div><div>I'm using QGIS 3.14 LTS.<div class="gmail-adL"><br><br></div></div></div></div>