Area
The surface size of a polygon, usually reported in square meters or square kilometers.
Category: Geometry
Definition (expanded)
Area depends on CRS and method. If your geometry is in lon/lat degrees (EPSG:4326), a naive planar area is misleading—especially at high latitudes. For accurate results, use a projected CRS in meters (or geodesic methods) as required by your pipeline.
Related terms
CRS (Coordinate Reference System)A definition of how coordinates map to real locations on Earth, including projection, datum, and units.EPSG:4326 (WGS84 lon/lat)A common coordinate reference system using longitude/latitude on WGS84.GeodesicMeasurements or operations computed on the curved Earth model rather than a flat plane.Reprojection (coordinate transformation)Converting coordinates from one CRS to another (e.g., EPSG:4326 lon/lat → EPSG:3857 meters).PolygonA closed area geometry defined by an exterior ring and optional interior rings (holes).