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| IntroductionThis chapter describes the Visualization Toolkit (VTK) data format developed by Kitware. VTK is an open source software system for 3D computer graphics, image processing and visualization. The VTK data format is the primary data structure used internally in Geocap for algorithms and visualization. |
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Datasets
Datasets are usually geometrical representations of surface and body shapes in 3D space. In additon datasets may represent velocity fields, petrophysical parameters, seismic images and virtually any kind of recorded data.
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POINT X Y Z scalars TEMPERATURE PRESSURE
0 3.4 234.3 45.12 45.12 0.43 45.6
1 5.6 290.5 55.63 55.63 0.44 45.5
2 6.67 300.3 78.00 78.00 0.45 45.3
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POINT i j HEIGHT
0 0 0 34.3
1 1 0 34.4
2 2 0 34.5
3 0 1 34.2
4 1 1 34.3
5 2 1 34.6
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POINT I J RED GREEN BLUE
0 0 0 120 210 77
1 1 0 73 56 27
2 2 0 15 110 99
3 0 1 84 57 51
4 1 1 51 72 11
5 2 1 67 11 87
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An image consisting of a rectangular array of pixels is an example of raster graphics, as opposed to the vector graphics created by polydata.
Image Modified
The Amazon rainforest (NASA)