[R-sig-Geo] using readGDAL() for ESRI raster file
karl.sommer at dpi.vic.gov.au
karl.sommer at dpi.vic.gov.au
Thu Jun 1 06:28:32 CEST 2006
Hello list
thanks to the helpful advice given by list members I have been able to read
and re-project vector based shape files and attributes data using readOGR()
under rgdal for further analysis (kriging, k-means clustering) and
plotting.
Using the sp.layout under spplot allowed me to precisely overlay different
data layers.
Yesterday I was attempting to use the function readGDAL() to read an ESRI
*.bil raster file of remote sensing spectral data.
Using GDALinfo under DOS within the data directory where the file is
located gave me the following information
gdalinfo -nomd inputfile.bil
Driver: EHdr/ESRI .hdr Labelled
Size is 813, 516
Coordinate System is `'
Origin = (617405.000000,6190325.500000)
Pixel Size = (0.50000000,-0.50000000)
Corner Coordinates:
Upper Left ( 617405.000, 6190325.500)
Lower Left ( 617405.000, 6190067.500)
Upper Right ( 617811.500, 6190325.500)
Lower Right ( 617811.500, 6190067.500)
Center ( 617608.250, 6190196.500)
Band 1 Block=813x1 Type=Int16, ColorInterp=Undefined
Band 2 Block=813x1 Type=Int16, ColorInterp=Undefined
Band 3 Block=813x1 Type=Int16, ColorInterp=Undefined
Band 4 Block=813x1 Type=Int16, ColorInterp=Undefined
Band 5 Block=813x1 Type=Int16, ColorInterp=Undefined
Band 6 Block=813x1 Type=Int16, ColorInterp=Undefined
when I am trying to read the same file using readGDAL() in R I get the
following error and so far have not been able to make sense of it.
test <- readGDAL("inputfile.bil", package="gdal")
inputfile.bil has GDAL driver EHdr
and has 516 rows and 813 columns
Error in getRasterData(x, offset = offset, region.dim = region.dim, ...) :
unused argument(s) (package ...)
Any pointers would be gratefully accepted
Regards
Karl J Sommer
Scientist
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