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DeLorme Topo North America Help
205
o USGS Quads (3DTQ) — 12-14
Color contour topographic maps produced by the United States Geological Survey.
Downloaded using the NetLink tab.
o Aerial Imagery (DOQQ) — 15-16
Black and white 1-meter resolution digital aerial photography. Downloaded using
the NetLink tab.
o Color Aerial Imagery (DOQQ) — 13-17
True-color 1-meter resolution digital aerial photography. Downloaded using the
NetLink tab.
o 1:50K Canada Topographic Map Sheets — 10-15
Coverage for most of Canada. Can overlay other maps. These maps are made
from original Canadian map sheets and are a combination of Toporama maps,
photomaps, and scanned maps. They include not only topographic contour lines
and water but also significant buildings, historic sites, and other man-made
features in urban areas. Downloaded using the NetLink tab.
o NOAA Nautical Charts (varies)
Color bathymetric nautical charts produced by the National Oceanic and
Atmospheric Administration (NOAA). Downloaded using the NetLink tab.
o USGS Hi-resolution 133 City Imagery — 13-17
Color aerial imagery over the country's largest metropolitan areas with a
resolution of approximately 1/3 meter (or about 1 foot).
• Click Use Defaults to return the slider controls to their default minimum and
maximum values.
• Raster imagery (such as USGS Quads, aerial imagery, NOAA nautical charts, and
satellite imagery) includes color-coded data zoom level suggestions under Zoom
Range.
• Green indicates the data zoom levels at which the data is best viewed on the
device. The default values are set to only export data zoom levels that are in the
green area.
• Red indicates zoom levels at which the data is available but not necessarily the
best viewed.
• Maps with multiple data types have large file sizes. To decrease the file size when
exporting multiple map data types, try exporting raster data with small data zoom
level ranges.
• For information on how data zoom levels display on Earthmate PN-Series GPS
devices, see Data Zoom Level/Scale Bar Translation.