Guides that mention GIS.
Showing 5 / 5
formats · 2026-01-08
Choose the right polygon format for your workflow. Learn what WKT, WKB, GeoJSON, Shapefile, KML, and KMZ are best at, what breaks pipelines, and how to convert safely in the browser.
validation · 2026-01-07
A hole must sit inside its outer ring. Learn how to detect a hole outside the outer ring, fix it in the browser, validate the result, and export clean WKT or GeoJSON.
validation · 2026-01-07
A zero-area ring is a degenerate polygon. Learn how to spot it, remove or repair it in a browser, validate the result, and export clean WKT or GeoJSON.
validation · 2026-01-06
A polygon ring must end where it starts. Learn how to spot an unclosed ring, close it correctly in WKT or GeoJSON, validate the result, and export clean geometry.
validation · 2026-01-06
Self‑intersections (“bowties”) make polygons invalid. Learn how to detect the crossing, repair it in a browser, validate the result, and export clean WKT or GeoJSON.
