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| | Collection
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Creating a map
Aerial Photography images are viewed
in our stereoplotters. The image of a "floating-point cursor"
appears in the optical train of the stereo model (55% overlap). The
overlapping imagery of two separate photos when viewed in our stereoplotter
equipment appears to be three dimensional (3-D). The stereomodel is set by
tipping, tilting, and rotating to level the stereo image to the known actual
ground (photo-points) measurements (Northing (x), Easting (y), and
Elevation (z)). An operator (compiler) then collects (traces) features
individually in a
series of steps. This display shows the steps of collection by an operator
viewed in a stereoplotter.
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|
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1. Roads, Buildings, Driveways. |
| 2.Utilities,
Objects.. |
| 3.
Vegetation, Wetlands. |
| 4.
Breaklines and spots. |
| 5.
Generating a TIN. |
| 6.
Created contours from TIN and placed Spot elevations. |
| 7.
Final edited map. |
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