Changes between Version 32 and Version 33 of WKTRaster/Documentation01

Timestamp:

Dec 9, 2009, 12:46:27 PM (14 years ago)

Author:

pracine

Comment:

—

WKTRaster/Documentation01

@@ -271 +271 @@
  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.
 
+Table 1 - Characteristics of different raster table arrangements:
+
+|| '''Arrangement''' || '''Global shape of composing raster''' || '''Missing tiles possible''' || '''Same size tiles''' || '''Tile overlap possible''' || '''Form a coverage?''' ||
+||a) image warehouse of untiled and unrelated images|| any || no tiles || no tile || yes || No ||
+||b) irregularly tiled raster coverage || any || yes || no || no || yes ||
+||c) regularly tiled raster coverage || any || yes || yes || no || yes ||
+||d) rectangular regularly tiled raster coverage || strictly rectangular || no || yes || no || yes ||
+||e) tiled image || strictly rectangular || no || yes || no || not as a single table ||
+||f) raster object coverage || any || no real tiles || no real tiles || yes || yes ||
+
+