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Echo sounder data

Help refine the 3D models of reservoir and river beds. Upload a log from your echo sounder and we will merge it with measurements from other anglers.

  • We never publish tracks or points
  • Files are read in your browser
  1. Choose files

    Your browser reads them on your computer or phone and shows the track and depths. Only what we need is sent to the server.

  2. Check and send

    Choose the fishing ground, enter the transducer depth below the surface and confirm that these are your own measurements.

  3. We refine the bottom model

    We convert the measurements to the water level on the day they were taken and merge them with the others. The bottom model is refined at the next recalculation.

Formats we can read

  • CSV and XYZDeeper (app export), your own tables with latitude, longitude and depth, CSB format
  • GPXTrack with depth in its points (for example Garmin, OpenCPN, phone apps)
  • NMEA 0183Log from a chartplotter or data bus: depth (DBT, DPT, DBS) and position (GGA, RMC)
  • GeoJSONPoints with depth in the properties or as the third coordinate
  • Lowrance SL2 and SL3Sonar logs from Lowrance, Simrad and B&G units
  • Humminbird.DAT file together with the folder of .SON files (choose the whole folder)
  • Garmin RSD, Lowrance SLG and othersWe store the whole file and process it once we add support for the format

A phone's lidar can't see under water – water absorbs infrared light. If you have an echo sounder log in another format, upload it too; we'll store it and get back to you.

Frequently asked questions

Will anyone see my fishing spots?

No. We never publish tracks or individual points anywhere. Measurements are merged with others into the bottom model grid, from which neither the track nor the boat's position can be read.

Why do you need the measurement date?

Reservoir levels vary by as much as several metres. That is why we convert depths to the water level on the day of measurement; otherwise measurements from different days could not be combined.

Can I delete my measurements?

Yes, any time in the My measurements list. Closing your account deletes all of them.

Can I upload a chart from Navionics or C-MAP?

No. Those charts are protected by licence. Only upload what you measured yourself with your own echo sounder.