TRANSPARENCY ON THE WATER

Sources & coverage

This is a working app preview. Lake locations and featured lake map layers come from public Maine state datasets.

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Lake locations & shorelines
Maine DEP lakes GIS. All available lake and pond shorelines are stored in the app and load when a lake is selected. A blank state type is included only when the state name or an IF&W lake survey identifies a lake or pond. Rivers, bays, and other waterway types are excluded.
Depth soundings
Maine DEP / IF&W historical depth-point data. Individual survey readings, not live depth, continuous contours, or a prediction between points. Survey dates are not supplied in the downloaded point fields.
Lake survey maps
Maine IF&W survey map directory. Original documents open separately.
Launches & buoy markers
Maine DACF boat launches and state navigational aids. Some hazards and access sites are not listed. Marker locations and conditions can change.
Shore bands & location
Calculated from mapped waterbody boundaries, including mapped island edges. Boundaries, water levels, and GPS can differ from actual conditions. These are planning estimates, not navigation charts or a legal determination.
Lake association guidance
Links to independent community organizations. Listing an organization does not imply an MWSC partnership. Their advice is separate from enforceable law.
Data snapshot
Lake and depth data downloaded September 30, 2026. Launch and buoy data downloaded September 29, 2026. Download date is not the survey or inspection date. Saved lake guides contain text and source links; they do not include offline navigation charts.
Base map
© OpenStreetMap contributors. Internet access required for base-map tiles.