Previously using ESRI's ArcMap, I projected both shapefiles and rasters
into NAD27.  Now I do not have access to ESRI and am using various R
packages instead. When I read both types of files into R, the shapefile
shows, "proj4string : [+proj=aea +lat_1=34 +lat_2=40.5 +lat_0=0 +lon_0=-120
+x_0=0 +y_0=-4000000 +datum=NAD27 +units=m +no_defs +ellps=clrk66
+nadgrids=@conus,@alaska, @ntv2_0.gsb, @ntv1_can.dat]".  Likewise, the
raster files states, "coord. ref. : +proj=aea +lat_1=34 +lat_2=40.5
+lat_0=0 +lon_0=-120 +x_0=0 +y_0=-4000000 +datum=NAD27 +units=m +no_defs
+ellps=clrk66 +nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat".
<http://webpages.uncc.edu/~shaas1/index.htm>

Do you know why it appears that I have "combined" projections?  Could this
be due to the fact that I "projected" them in ArcMap at a previous time and
the previous/new information is being carried over? Is this cause for
concern?

Thank you for your time.

--Sarah <http://webpages.uncc.edu/%7Eshaas1/index.htm>

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