How to open a .GSI file online
From file to map in seconds.
Open your .GSI file
Drag it onto the box or click to choose it from your device. It opens on your computer.
See it on the map
Points, lines and areas from your .GSI file appear on an interactive map. Click any feature to read its details.
Read the stats
Check distance, elevation gain and loss, the bounding box and a height profile linked to the map.
What is a .GSI file?
The common language of GPS devices.
A .gsi file is a Golden Software Interchange Format file, a proprietary binary format for exchanging map, vector, and GIS data between Golden Software products. Open it with Golden Software Surfer (Windows). There is no free reader. To use the data in ArcGIS or QGIS, convert it to SHP or KML inside Surfer first.
Programs that open .GSI files
| Full name | Golden Software Interchange Format |
|---|---|
| Developer | Golden Software, LLC (formerly Golden Software, Inc.) |
| First released | circa 1990s (with early Surfer/MapViewer releases by Golden Software) |
| Category | Maps & GIS |
| MIME type | application/octet-stream |
Related viewers
More free tools for your files.
Is my .GSI file uploaded anywhere?
No. Your .GSI file is read by your browser and never sent to us. Only the background map tiles are loaded from OpenStreetMap, which sees which map area you're looking at, not your data.
How is the elevation gain calculated?
We add up every climb between track points, ignoring tiny wiggles of less than 3 metres that come from GPS noise. That's close to what Strava and Garmin report; barometric devices may differ slightly.
How do I open a Shapefile?
A Shapefile is several files. Drop the whole .zip, or select the .shp, .dbf and .prj files together. With only the .shp you'll see the shapes but no attributes.
Can I convert GPX to KML or GeoJSON?
Use Export GeoJSON to save everything you see. GPX ↔ KML conversion is part of our upcoming converter.
My CSV has coordinates. Will it work?
Yes, if it has columns named like lat/latitude/y and lon/lng/longitude/x. Every row becomes a point with the other columns as properties.
Was this tool helpful?
Your rating helps us decide which tools to improve next.