[R-sig-Geo] Import .gz-File

[Kenneth Takagi]

Rosi,
I forgot to add that you need to install package "GEOquery" first to 
access gunzip function.

-Ken

On 6/14/2010 12:30 PM, Kenneth Takagi wrote:
> Rosi,
>
> Try this:
> #unzip "temp.gz" files and save file as "temp.txt":
> gunzip(filename = "temp.gz", remove = T, overwrite = T, destname =
> "temp.txt")
> #now read in "temp.txt" as SpatialGridDataFrame
> SGDF = read.asciigrid("temp1.txt", proj4string = CRS("+init=epsg:4322"))
>
> This assumes that "temp.txt" is a ascii grid file.
> HTH,
> Ken
> On 6/14/2010 11:27 AM, Roger Bivand wrote:
>> On Mon, 14 Jun 2010, Siber Rosi wrote:
>>
>>> Dear all, Is it possible to import Esri ascii files which are
>>> compressed in a .gz file direct to R? My example : 111212.asc in an
>>> .gz File I thought there might be a similar command as the
>>> "zip.file.extract"- command. I tried the "gzfile" command, but it did
>>> not work. Do you have any suggestions?
>>
>> The readGDAL command in rgdal needs a file, I believe, as also does
>> readAsciiGrid() in maptools. The header is part of the same file, so it
>> needs to be read in different ways, first to get the metadata, then to
>> read the data.
>>
>> Roger
>>
>>> Thank you very much in advance.
>>> Best wishes, Rosi
>>>
>>>
>>> ???
>>> Rosi Siber
>>> Swiss Federal Institute of Aquatic Science and Technology (Eawag)
>>> Siam
>>> Ueberlandstrasse 133
>>> 8600 Duebendorf
>>> Switzerland
>>> Phone: +41 (0)44 823 5566
>>> Fax: +41 (0)44 823 5375
>>> rosi.siber at eawag.ch
>>> http://www.eawag.ch/~siberros
>>>
>>>
>>>
>>>
>>>
>>>
>>> [[alternative HTML version deleted]]
>>>
>>>
>>
>
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