EPSG Code

An EPSG Code provides a standardized way to identify coordinate systems and geodetic definitions used in geospatial data. Each code corresponds to a specific spatial reference definition, helping GIS software determine how coordinates should be interpreted on the Earth's surface. EPSG codes are commonly associated with geographic coordinate systems, projected coordinate systems, datums, ellipsoids, and coordinate transformations. For example, EPSG:4326 identifies the WGS 84 geographic coordinate system, while other codes represent regional or projected systems designed for specific mapping requirements. EPSG identifiers are widely used in GIS, GPS, satellite imagery, remote sensing, surveying, mapping, and spatial databases. Selecting the appropriate EPSG code is important when importing, exporting, reprojecting, or combining geospatial datasets. Incorrect CRS identification can cause layers to appear shifted or misaligned. By using standardized EPSG identifiers, professionals can improve interoperability and maintain consistent spatial references across different GIS software, APIs, and geospatial data formats.