[R-sig-Geo] intersecting two polygons

2008-06-09 Thread milton ruser
Dear ALL, I need to intersect two polygons and generate a thirth object with the intersect area/polygon). The sample bellow ilustrate part of the task (Thanks Roger!). At the end I plot my two sample polygons, highlighting the output that I am looking for (the red region). I know that I can use Ar

[R-sig-Geo] Semivariogram Plot

2008-06-09 Thread PUJAN RAJ REGMI
Dear list, I am trying to use semivariogram for texture classification for RS imagery. For this I am using the techniques of minimum distance algorithm to classy the image. To calculate minimum distance which is actually based on the gamma value of training site for each lag and those of pixel

[R-sig-Geo] geoinformatics innovation price

2008-06-09 Thread Edzer Pebesma
52north, a spin-off with strong links to our department, has written out a contest for the innovation price in geoinformatics, see http://52north.org/index.php?option=com_content&task=view&id=213&Itemid=148 Needless to say that I'd be more than happy to see submissions on the geoinformatics-R