June 2017
Beginner
428 pages
10h 2m
English
Content preview from Practical GIS
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Rasters are boring
To put it simply--absolutely not. Well, maybe in QGIS a little bit, but rasters have potential far beyond the needs of an average GIS analysis. First of all, rasters do not need to be in two-dimensional space. There are 3D rasters called voxels, which can be analyzed in their volume or cut to slices, visualized in a whole, in slices, or as isosurfaces for various values (Appendix 1.1).
Furthermore, cells don't have to be squares. It is common practice to have different resolutions in different dimensions. Rasters with rectangular cells are supported by QGIS, and many other open source GIS clients. Rasters don't even need to have four sides. The distortions (we can call it sampling bias in some cases, mostly in statistics) ...
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