Garmin USA Topo, BlueChart, Magellan Topo USA, and USGS DRG Maps in Glacier Bay, Alaska
Garmin maps are derived from vectorized USGS 1:100,000 topo maps.
Magellan maps are derived from the USGS DEM (Digital Elevation Model) points on a 90-meter grid.


Garmin USA Topo


Magellan Topo USA


USGS 1:96,000 Scale


Garmin BlueChart


Garmin WorldMap

1:24,000 Maps

Garmin USA Topo


Magellan Topo USA


USGS 1:24,000 (original) Scale


Garmin BlueChart

Note that the glacier at the GROUP-PHOTO has receded farther in the USGS map than the BlueChart

Jack Yeazel