import - R - raster function NAs values lower than -9999 in ASCII file -

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i have been having problems importing ascii raster has values go min. :-69826220 max. :167780500. problem encountering when use raster function import ascii file every value smaller -9999 reported na , minimum value -9458.

is bug of function , there workaround? when import same ascii file data frame fine , whole range of values. using same procedure import other ascii rasters , don't have problem.

here link ascii file https://dl.dropboxusercontent.com/u/24234831/ps0011yme.asc

here session info, opened new session in case.

sessioninfo() r version 3.0.0 (2013-04-03) platform: x86_64-w64-mingw32/x64 (64-bit)

locale: [1] lc_collate=english_united states.1252 [2] lc_ctype=english_united states.1252
[3] lc_monetary=english_united states.1252 [4] lc_numeric=c
[5] lc_time=english_united states.1252

attached base packages: [1] stats graphics grdevices utils datasets methods base

other attached packages: [1] raster_2.1-16 sp_1.0-8

loaded via namespace (and not attached): [1] grid_3.0.0 lattice_0.20-15

any appreciated

you can try use setminmax() on raster file try , work out min , max values , store them in returned raster* object. try so:

r <- setminmax( raster("path/to/myraster.asc") )

i not sure happening because if downlaod data , do:

r1 <- raster( "~/downloads/test.asc") summary(values(r1))      min.   1st qu.    median      mean   3rd qu.      max.      na's  -69830000  -4789000    737300  16950000  13880000 167800000     71468

please add output of sessioninfo() into question , i.e. not comment.

the errors in case being caused not having rgdal installed, bindings geospatial data abstraction library , important importing/exporting raster , shapefile data.


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