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Stereo Viewer : DEM Viewer
The DEM Viewer is only available in the Softcopy package and is started in the same way as the other viewers by pressing the 'Show DEM Module' in the popup menu.
It's main function is to measure a DEM manually.
Clicking on the 'OrbitGIS Interactive' viewing panel with the right mouse button will show the next popup menu:
Select the 'Show DEM Module' to start the next DEM Viewer:
The menu functions 'View' and 'Options' are the same as described in the paragraph on Common Features in Stereo Viewers chapter.
Introduction:
The purpose of the DEM Module is the measurement of height points.
This module provides for:
- the random measurement of DEM points
- the measurement of DEM points on a predefined grid
These methods are both manual, and therefore don't add a quality factor to the measured DEM point.
Random Measurement:
Follow the next steps to measure a DEM point:
- Put the floating mark on the ground using the scroll mouse button as described in 'Moving the Floating Mark'.
- Measure the height value by pressing the
button.
The XYZ point will be added to the Project DEM set. \ A small cross will be drawn in the stereo viewer.
Follow the next steps to delete a DEM point:
- Put the floating mark in the neighborhood of the DEM point you want to delete as described in 'Moving the Floating Mark'.
- Press the
button to make the deletion effective.
Measurement on a grid:
- The grid size is defined in 'Step 1: Project Settings' of the Project wizard.
- Pressing the arrow icons moves the floating mark to the next grid point in the direction of the arrow.
- Put the floating mark on the ground using the scroll mouse button as described in 'Moving the Floating Mark'.
- measure the height value by pressing the button.
The XYZ point will be added to the Project DEM set.
A small cross will be drawn in the stereo viewer.
Save DEM:
Pressing the save button saves the project's DEM in '{Projectname}.sdp'.