Identify Map Projection & EPSG Code
Find Projection from File
Upload a GIS file to instantly detect its map projection, EPSG code, datum, and CRS metadata.
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How to Detect the Map Projection of a GIS File
When working with spatial data, one of the most common problems is opening a GIS file and seeing your features land in the wrong location — or worse, completely off the map. This almost always means the file's Coordinate Reference System (CRS) was not correctly identified. Our EPSG Finder helps you instantly detect the projection metadata embedded inside your file, without requiring QGIS or ArcGIS.
Frequently Asked Questions
What is an EPSG Code?
EPSG codes are standardized numeric identifiers maintained by the International Association of Oil and Gas Producers (IOGP) that uniquely reference a Coordinate Reference System. For example, EPSG:4326 refers to the WGS 84 geographic coordinate system used by GPS devices, while EPSG:32643 refers to WGS 84 / UTM Zone 43N.
Why can't my GeoTIFF be fully analyzed?
GeoTIFF files can be several gigabytes large. Loading the full raster data inside a web browser would freeze or crash the tab. Our tool reads only the GeoTIFF header tags (GeoKey metadata entries), which contain the complete CRS information without needing to load any pixel data — keeping your browser responsive at all times.
Why can't the tool find my Shapefile's EPSG code?
The standard Shapefile format (`.shp`) does not include the EPSG code directly. Instead, the projection is described as a WKT (Well-Known Text) string in a companion `.prj` file. Our tool first parses this WKT string and then queries epsg.io to resolve the most likely matching EPSG code.
Keywords: detect map projection, find EPSG code, identify coordinate reference system, projection detector GIS, CRS finder, shapefile projection checker, geotiff CRS metadata.
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Frequently Asked Questions
Q:Is Find Projection free to use?
Yes, detecting CRS metadata is fully free.
Q:Does Find Projection upload my files to a server?
No, the file header analysis is local with no upload required.
Q:What file formats does Find Projection support?
Supports Shapefile (.prj), GeoJSON, KML, and GeoTIFF files.
Q:Does it provide the WKT string?
Yes, it displays the full WKT and Proj4 strings for the detected projection.