Triton TritonNav User Manual
Page 57
2004.06.28
CHAPTER 1: Using DelphNav™ (Survey Control Panel)
51
Using Delph Nav
An Example of Survey Planning in DelphNav
The data in this sample exercise is as follows:
• a DXF coastline file from Portland Maine (portland.dxf), which has metric coor-
dinate information based on the UTM projection and the NAD27 datum
• a number of lines in an ASCII file based on UTM projection and the WGS1984 datum
(portland_lines.txt), with the coordinates in meters
We will assume that the navigation input will be from a GPS receiver with an output in lat-
itude and longitude using the WGS84 datum. And that the final project requirement is for
a UTM projection in meters.
Importing a DXF file with Coast line (or Other) Data
Any information — such as coastlines, pipeline routes, or cable routes that could be
represented as line (vector) data — can be imported and displayed in DelphNav as a DXF
file.
To import a coastline data (or other data) as a DXF file
Important: DelphNav at this time only imports ASCII DXF files in the AutoCAD R12 for-
mat.
1.
Click
Project
→
Insert Layers
and use the pull-down arrow to select
ASCII AutoCAD
files (*.DXF)
.
The system displays an Open dialog box (Figure 29).