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JONON
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Re: how to extract values from a raster according to Lat and long of the values?

Pascal Oettli-2
?extract

HTH
Pascal


Le 27/01/2013 22:53, Jonsson a écrit :

> having 12 files with 12 hdrs for one year:    these files are raster
> (projected  WGS84,lat
> long):https://echange-fichiers.inra.fr/get?k=rLSyoavrnifGyH5XrlO
>
>                samples = 1440
>                 lines   = 720
>                 bands   = 1
>                 header offset = 0
>                 file type = ENVI Standard
>                 data type = 4
>                 interleave = bsq
>                  byte order = 0
>            map info = {  Geographic Lat/Lon, 1, 1, -180, 90, 0.25,
> 0.25,WGS-84}
>              coordinate system string =
> GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",
>                       SPHEROID["WGS_1984",6378137,298.257223563]]
>             ,PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]
>                       }
> These lines will open the files as a list:
>
>            a<-list.files("D:\\ECV\\2010", "*.envi", full.names = TRUE)
>                 for(i in 1:length(a)){
>                  d <- raster(a[i]}
>
> I would like to extract the values correspond to  44.8386° N, 0.5783° W from
> all files as txt file
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/how-to-extract-values-from-a-raster-according-to-Lat-and-long-of-the-values-tp4656767.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> [hidden email] mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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Re: how to extract values from a raster according to Lat and long of the values?

jholtman
How do you get those values from the example header file that you included?

On Sun, Jan 27, 2013 at 9:15 PM, Pascal Oettli <[hidden email]> wrote:

> ?extract
>
> HTH
> Pascal
>
>
> Le 27/01/2013 22:53, Jonsson a écrit :
>>
>> having 12 files with 12 hdrs for one year:    these files are raster
>> (projected  WGS84,lat
>> long):https://echange-fichiers.inra.fr/get?k=rLSyoavrnifGyH5XrlO
>>
>>                samples = 1440
>>                 lines   = 720
>>                 bands   = 1
>>                 header offset = 0
>>                 file type = ENVI Standard
>>                 data type = 4
>>                 interleave = bsq
>>                  byte order = 0
>>            map info = {  Geographic Lat/Lon, 1, 1, -180, 90, 0.25,
>> 0.25,WGS-84}
>>              coordinate system string =
>> GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",
>>                       SPHEROID["WGS_1984",6378137,298.257223563]]
>>             ,PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]
>>                       }
>> These lines will open the files as a list:
>>
>>            a<-list.files("D:\\ECV\\2010", "*.envi", full.names = TRUE)
>>                 for(i in 1:length(a)){
>>                  d <- raster(a[i]}
>>
>> I would like to extract the values correspond to  44.8386° N, 0.5783° W
>> from
>> all files as txt file
>>
>>
>>
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/how-to-extract-values-from-a-raster-according-to-Lat-and-long-of-the-values-tp4656767.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> [hidden email] mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> ______________________________________________
> [hidden email] mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.



--
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

______________________________________________
[hidden email] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.