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Grid size comparisons, Data zoom level/scale bar translation – DeLorme Topo North America 9.0 User Manual

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DeLorme Topo North America 9.0 User Guide

206

Grid Size Comparisons

When you use the Handheld Export tab to export maps, you can choose a grid size. A grid

of the same size gets progressively larger in coverage (square area) the closer it is to the

equator. This is because the grid system is based on the latitude/longitude coordinate

system.

60 seconds = 1 minute
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 DeLorme Topo North America, 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.