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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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An attribute always has a name. They are also called field data as they are saved as field data in a vtk dataset. A similar list will be produced by Table View that is found on the right click menu for every dataset in the project.
Scalars
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A special attribute type in Geocap is called scalars. When a structure is mapped, the colors of the map are according to the scalars. The scalar values can be the geometry itself. The map colors will then show the geometry. Otherwise the map will have colors from the scalar attribute.
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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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2d grid to the left and 3d grid to left
Undefined values in grid
A grid may have regions that is not part of the grid surface (or cube body for 3d grids). Geocap uses a value called undef to indicate those grid nodes. They play an important part in the grid definition and layout. A Table View listing of a grid will list the undefined values as void.
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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.
The Amazon rainforest (NASA)