Calculating variograms directly from data in a grid map now works again. Especially for dense grids (e.g. images), this should be much faster than calculation from data in ascii tables, as gstat precalculates distances for all grid index pairs.
It turned out that the problem was only related to PCRaster maps that have a projection type where the y-coordinate increases from top to bottom. For other maps it worked and still works. >From gstat 2.3.6 on, I completely dropped support for this kind of maps, as they lead to problems in more than one area. Any objections? -- Edzer
