APPENDIX
1
How
to Create Contour Lines with MicroDEM
1.
Create a subset of the DEM data
In MicroDEM, go to data manipulation (in/out button)
Select "Subset" -> DEM rectangular ->
graphical
Click and drag from the NW corner to the SE corner of the
necessary area
MicroDEM will prompt you for a filename
Close all DEMs
2.
Convert DEM to DXF format
Click the "in/out" button again
Select "Export -> DXF contours -> UTM"
Program will prompt you for a filename
Select the filename from above and wait. (see
"necessary" above?)
MicroDEM will create possibly several DXF files
3.
Import the contours into OCAD
In OCAD, create a new map
Go to "file -> import ..."
Select the DXF filename from above
Select the following options:
"Existing offset and angle"
"GIS"
"new offset"
If there are multiple DXF files, the other files should be
read using the "import coordinates" option. Your
coordinate system in OCAD is now set to real world UTM.
Select one of the gray contour lines. Select the contour symbol icon.
Click "extras -> change symbol -> OK"
(layer should be selected)
The gray lines should change to contour symbols.
