GeoReference

Georeferencing Tool

Align scanned maps, aerial photos, and site plans to real-world coordinates. Everything runs in your browser — your imagery never leaves your device.

An aerial photograph of the Agora in Athens: the kind of image you georeference to lay it over today’s map.
An aerial photograph of the Agora in Athens: the kind of image you georeference to lay it over today’s map. Photo: Carole Raddato from FRANKFURT, Germany · CC BY-SA 2.0 · Wikimedia Commons
1Upload an image — a scanned map, aerial photo, or site plan (PNG, JPEG, GIF, WebP, or TIFF).
2Add control points — click a recognizable spot on the image, then click the same spot on the map. Repeat for at least 3 points spread across the image.
3Check & export — review the live overlay and residuals, then download a GeoTIFF, world file, or KMZ.

imageImagedrag & zoom · click to place a point

upload_file
Drop an image here or click to browse
PNG · JPEG · GIF · WebP · TIFF — processed locally, nothing is uploaded
ads_click Point placed on the image — now click the same location on the map.

publicMapclick to match the image point

opacity

pin_dropGround Control Points

#Image XImage YLongitudeLatitudeResidual
No control points yet. Click a recognizable spot on the image to start — road intersections, building corners, and landmarks work best.

downloadExport

GeoTIFF: rectified (warped) raster in Web Mercator, ready for QGIS/ArcGIS.
World file: your original untouched image + sidecar .wld/.prj georeference.
KMZ: ground overlay for Google Earth.

lockAll processing happens locally in your browser. Images and coordinates are never uploaded to a server.

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