I'm running windows xp, R 2.3.1 with maptools 0.6-6, I guess. 
When plotting from a large SpatialLinesDataFrame and using xlim & ylim to reduce the area, the plot axes automatically have the same scale size, even if xlim and ylim ranges differ.  
E.g.:
tmp <- readShapeLines(filepath)
plot(tmp,xlim=c(-126,-119),ylim=c(50,51))

The y-axis range is actually 47-54, same range as the x-axis.  What am I doing wrong?  Should I be using a different object for simple coastline & river data?
Thanks in advance!
Michael

_______________________________________________________
Michael Folkes
Salmon Stock Assessment
Canadian Dept. of Fisheries & Oceans     
Pacific Biological Station
3190 Hammond Bay Rd.
Nanaimo, B.C., Canada
V9T-6N7
Ph (250) 756-7264 Fax (250) 756-7053  folkesm@pac.dfo-mpo.gc.ca


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