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An Example of Survey Planning in DelphNav Using Delph Nav

54 CHAPTER 1: Using DelphNav™ (Survey Control Panel) 2004.06.28

6. Because this DXF file in our worked example is the coastline around Portland, Maine,

and because the coastline’s coordinates are UTM with NAD27 datum, select

Universal Transverse Mercator; then click Next.

At this point you need some idea of where Portland, Maine, is in terms of its naviga-

tion coordinates. It turns out the longitude of Portland, Maine, is around 70 degrees

West, and it is in the Northern Hemisphere.

7. Select

Zone 19 (66W to 72W) and check the North Hemisphere radio button; click

Next and select North American Datum (1927); click Finish.

After a short pause the Projection Settings box re-appears and the system displays the

data relevant to your input projection settings (Figure 32).

FIGURE 32. Projection Settings box with input projection info

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Triton TritonNav Bedienungsanleitung Seite 60