Search Archives
Search tips
from:Name
Search by author name, e.g. from:Duncan Murdoch
"exact phrase"
Match an exact phrase
word1 word2
Match messages containing both words
Date range
Use the date pickers to filter results to a time period
Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.
Hi, trying to extract by mask using sp package. Was surprised that I couldn't find 'overlay(x = "SpatialPixelsDataFrame", y = "SpatialPolygon")' to extract pixels within a polygon. So instead I'm using ascPoints <- SpatialPoints(coordinates(asc)) ascPointsHR <- ascPoints[!is.na...
On Thu, Jan 15, 2009 at 12:07, Edzer Pebesma <edzer.pebesma at uni-muenster.de> wrote: > > > David Wahlund wrote: >> >> Hi, >> trying to extract by mask using sp package. >> Was surprised that I couldn't find 'overlay(x = >> "SpatialPixelsDataFrame", y...
Hi I got the same error trying to do something similar. For me the problem was with the polygon data. One of the shapes was corrupted. My tip is to try and identify what polygon renders the error and confirm...
Can't find what you're looking for? Try searching with Google .