What is a .JGW file?
JGW is a world file that georeferences a JPEG image.
- Did you know
- JGW places a JPEG aerial photo correctly on the map.
- The odd name follows the world-file rule of taking the first and last letters of the image extension plus “w”, so jpg becomes jgw.
- A JGW holds six numbers giving pixel size, rotation and the map coordinate of the top-left pixel, with the y-scale usually negative.
- What Analyser reads
- Inspect geospatial and GIS files without a map: TopoJSON, OpenStreetMap XML, Esri Shapefile siblings (SHP/SHX/DBF/PRJ/CPG), world files, GML, NMEA GPS logs, IGC flight logs, MapInfo TAB/MIF, GDAL VRT, PMTiles, DTED terrain, Esri ASCII grids and SRTM .hgt - surfacing CRS/EPSG, feature/record counts, bounding boxes and elevation ranges. GRIB/NetCDF/GeoPackage/MBTiles/MrSID/ECW identified.
- Depth of analysis
- .JGW is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .JGW file
- Drag a .JGW file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.