Changes between Version 53 and Version 54 of WKTRaster/Documentation01


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Timestamp:
Dec 10, 2009, 11:00:17 AM (14 years ago)
Author:
pracine
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  • WKTRaster/Documentation01

    v53 v54  
    271271 f) '''a raster object coverage resulting from the rasterization of a vector coverage.''' Each vector feature becomes a small raster with the same extent as the original vector feature. This type of coverage is not necessarily complete, nor rectangular; tiles should be of different sizes and might overlap. It all depends on the characteristics of the vector layer being rasterized. An exhaustive (or continuous) layer of mutually exclusive geometries (without gaps or holes like a forest cover) would result in a raster object coverage in which significant pixels (withdata values) would not overlap, but non-significant pixels (nodata values) would. On the other end of the spectrum, a discontinuous layer of mutually exclusive geometries (like a lake or building layer) would result in a coverage of mostly disjoint raster objects.
    272272
    273 '''''Table 1 - Characteristics of possible different raster table arrangements in PostGIS WKT Raster'''''
     273'''''Table 1 - Characteristics of different possible raster table arrangements in PostGIS WKT Raster'''''
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    275275|| '''Arrangement''' || '''Global shape of[[BR]]composing raster''' || '''Missing tiles[[BR]]possible''' || '''Same size[[BR]]tiles''' || '''Tile overlap[[BR]]possible''' || '''Form a[[BR]]coverage?''' ||