[R-sig-Geo] Same mask for two rasters, but obtaining different extents in R

[Vijay Ramesh]

I loaded a shapefile in R, and cropped and masked it with the same mask,
but I get different extents. Any suggestions?

Code below:

    library(raster)
    library(rgdal)
    library(GISTools)
    library(sp)
    library(maptools)

    ##Loading the first mask
    Mask <- readOGR("C:\\Users\\rameshv\\Downloads\\Climate
Stability\\SPV_Mask\\mask.shp")
    proj4string(Mask) <- CRS("+init=epsg:4326")

    #Loading the Rasters For Present and LGM and clipping them to the right
extent
    bio5 <- raster("C:\\Users\\rameshv\\Downloads\\Climate
Stability\\Data_LGM_Present\\Present\\1_RawData\\bio_5")
    proj4string(bio5) <- CRS("+init=epsg:4326")
    lg5 <- raster("C:\\Users\\rameshv\\Downloads\\Climate
Stability\\Data_LGM_Present\\LGM\\1_RawData\\cclgmbi5.tif")
    proj4string(lg5) <- CRS("+init=epsg:4326")

    ##Cropping by using the Crop and Mask functions
    cr<- crop(bio5, extent(Mask))
    bio5 <- mask(cr, Mask)

    cr2<- crop(lg5, extent(Mask))
    lg5<- mask(cr2, Mask)

    > bio5
     class       : RasterLayer
     dimensions  : 339, 246, 83394  (nrow, ncol, ncell)
     resolution  : 0.04166667, 0.04166667  (x, y)
     extent      : 72.45835, 82.70835, 8.083337, 22.20834  (xmin, xmax,
ymin, ymax)
     coord. ref. : +init=epsg:4326 +proj=longlat +datum=WGS84 +no_defs
+ellps=WGS84 +towgs84=0,0,0
     data source : in memory
     names       : bio_5
     values      : 207, 432  (min, max)
     attributes  :
        ID COUNT
     from: -86     1
     to  : 489    38

     > lg5
     class       : RasterLayer
     dimensions  : 339, 246, 83394  (nrow, ncol, ncell)
     resolution  : 0.04166667, 0.04166667  (x, y)
     extent      : 72.45833, 82.70833, 8.083333, 22.20833  (xmin, xmax,
ymin, ymax)
     coord. ref. : +init=epsg:4326 +proj=longlat +datum=WGS84 +no_defs
+ellps=WGS84 +towgs84=0,0,0
     data source : in memory
     names       : cclgmbi5
     values      : 187, 392  (min, max)


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