I have a pretty simple code to extract cell values from a habitat map
(RasterLayer) based on xy coordinates.  I recently updated habitat
information with a new raster image but for some reason now when I read in
the values it's as though they are no longer being interpreted as discrete
values, so instead of select, discrete classes I am getting new arbitrary
groupings that I didn't create.  The input file is a standard
ArcGIS-configured GRID raster layer.  The attribute table in ArcCatalogue
displays the data as expected, and I've ensured the raster has been classed
as containing discrete values prior to opening it in R.

Perhaps something in the packages have changed since I ran this last?  I'm
currently trying to assess in the raster documentation what kind of
additional arguments I might have at my disposal in order to clarify how I
want the data to be read....

Tyler

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