Topo USA User Guide
198
60 minutes = 1 degree
A 1.5 degree grid = 9 30 minute grids, 324 5 minute grids, 8,100 1 minute grids, or
202,500 12 second grids.
A 30 minute grid = 36 5 minute grids, 900 1 minute grids, or 22,500 12 second
grids.
A 5 minute grid = 25 1 minute grids or 625 12 second grids.
A 1 minute grid = 25 12 second grids.
Grid
Size
Factor #
of
Grids
# of
Grids
# of
Grids
# of
Grids
Display Range
1.5
degree
9 x 30
minute
1
N/A N/A N/A 4-20
30
minute
36 x 5
minute
9
1
N/A N/A 6-20
5
minute
25 x 1
minute
324 36 1 N/A
8-20
1
minute
25 x
12
second
8,100 900 25 1 11-20
12
second
N/A 202,500
22,500
625
25 13-20
Data Zoom Level/Scale Bar Translation
Your DeLorme application and your Earthmate PN-Series GPS device use different
methods for representing the map's scale. In Topo USA, scale is represented as a
data zoom level (1-17). The Earthmate PN-Series GPS device uses a scale bar, based
on the measurement units chosen in Device Setup.
The following table describes the correlation between data zoom levels in your
DeLorme application and the scale bars on the device.
Scale Bar Label
Data
Zoom
Level
km/m mi/ft NM/ft NM/m
1 1000km
500mi
500NM
500NM
2 500km
250mi
250NM
250NM
3 250km
125mi
125NM
125NM
4 125km
64mi
64NM
64NM
5 64km
32mi
32NM
32NM
6 32km
16mi
16NM
16NM
Содержание Topo USA 8.0
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Страница 280: ...Topo USA User Guide 270 Z ZIP Postal Codes 36 Zone 234 Zoom Tools 10 20 Zooming In and Out 10 ...