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therion

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Convert SVG cave maps into GIS formats (GeoPackage, Shapefile, KML). Georeference cave surveys using GPS control points, satellite imagery overlays, and magnetic declination correction. Compatible with TopoDroid, Therion, and Survex.

  • Updated Apr 7, 2026
  • Python

Therion is a free full-version education software for Windows that allows users to create detailed topographic maps with vector drawings and contour lines. With the ability to insert images for guidance and calculate blood alcohol levels, it's an essential tool for topographers. Download the latest version free.

  • Updated Sep 17, 2026

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