Sources and limits

Check a layer’s source, date, and level of detail.

Map data can be incomplete or out of date. Slope colors, trail lines, and land boundaries help with planning, but they cannot confirm conditions on the ground.

Check the source and date

Open layers in Explore and leave the panel open to read the legend. Each visible overlay lists its source and vintage: the date or period of the original data. The elevation data behind the relief and the slope shading is credited once, in a Terrain section at the foot of the legend.

A recent publication date does not mean the underlying data is recent. A source with no stated date is labeled unverified.

For full credits, tap the Glassing logo, then Settings → About → Data Sources. Data coverage lists the areas and dates for each dataset.

Diagnostics stay on the phone too. Glassing never uploads them; Settings → Support → Delete diagnostics data erases every stored report, and the row appears only while there is one.

Read the limits

• Slope uses terrain at roughly a 10 m scale. Angle shows steepness; Aspect shows which direction a hillside faces. Smaller features may not appear in either. See Maps and layers.
• Trails can be missing or outdated. A line on the map does not confirm that a trail is passable.
• Ownership uses published land records. Parcel lines are not surveyed boundaries, and missing data does not establish public access.
• Cell Coverage shows carriers’ reported outdoor service, not a live signal reading. Shading does not guarantee a connection. See Cell Coverage.
• Imagery shows the ground when it was photographed. Check its date before using it to assess conditions.

Use the map alongside signs, current local information, and what you can see on the ground.

Need help? Email support.