Differences

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--- lovergine:geotricks [2011/04/09 10:24]
frankie
+++ lovergine:geotricks [2011/05/26 12:37] (current)
frankie
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 ===== Changing raster resolution in Grass  =====
-Just use the builtin computing region facility:
+Just use the builtin computing region facility, it will use a nearest neighbor interpolation for this purpose:
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-The same trick can be used to cut a portion of the original map, apply a mask and so on.
+A similar trick can be used to cut a portion of the original map, apply a mask, etc. A more capable module for those applications is ''r.resamp.interp'' which can be used instead of ''r.mapcalc'' to peform also bilinear and bicubic interpolation for the assigned raster grid. A nearest neighbor interpolation can also be performed by the ''r.resample'' module as well.
+===== WMS/WFS at PCN =====
+See [[WMS at PCN|here]] for details about using GRASS with national service at PCN.
+===== Precision grid =====
+[[http://lists.maptools.org/pipermail/proj/2011-April/005628.html|This]] is a very interesting thread about creating proj NTv2 precision grids starting from national precision grids in other formats, up to about 1:2000 scale and more.

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