I am trying to export a SpatialPixelsDataFrame object with floating
point values to an ASCII grid file and want to specify a nodata value. I
tried write.asciigrid from the sp package and I couldn't figure out how
to output float values. The pixel values exported as integers.
For now I am using the following writeGDAL statement:
--
writeGDAL(sp_hsm_pard, out_pard, drivername="AAIGrid", type="Float32",
options="DECIMAL_PRECISION=3", "NODATA=-9999")
--
This appears to output the image okay but it is not assigning the proper
values to NODATA_value. The NODATA_value in the exported file is "1"
instead of "-9999".
Can someone let me know how to output floating point data to an ESRI
ASCII grid file and specify a nodata value.
Thanks,
Ned
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