Isobaths (underwater contour lines) generated for all Vermont lakes and ponds with available bathymetric data. Currently that’s a small fraction of the actual lakes and ponds in Vermont. Generated for use on the Catamount Hardware Ice Atlas.

Processed files
- Lake Champlain isobaths as GeoJSON
- Vermont (non-Champlain) lake and pond isobaths as GeoJSON
- Combined bathymetry as PMTiles
View the combined bathymetry on Felt or via the PMTiles Viewer.
Sources
Lake Champlain
Lake Champlain Bathymetry points for general mapping purposes only.
The ElevationDEM_LKCHDEM data layer includes bathymetric data derived from NOAA nautical charts. All points were digitized from the RF 40,000 scale NOAA charts for Lake Champlain.
Vermont (non-Champlain) lakes and ponds
Bathymetric Data showing depth (ft) and location for various lakes and ponds in Vermont. Water depth is relative to pool elevation at the time of collection.
See also
Catamount Hardware Ice Atlas
Interactive map of Vermont ice conditions, including lake and pond depths.
Felt
Collaborative mapping platform used to visualize the bathymetry data.
PMTiles
Single-file tile archive format for efficient web map serving.
QGIS Contour Plugin
My fork of the QGIS plugin used to generate the isobaths.