[R] Rgdal package - get information

[Michael Sumner]

There is a mailing list R-Sig-Geo which is more appropriate for
questions about the rgdal and related packages.

If by "read the information GDType" you mean to get that "Int16"
description you can get it by delving into the attributes of the
GDALinfo return value, for example:

f <- system.file("pictures/erdas_spnad83.tif", package = "rgdal")[1]
attr(GDALinfo(f), "df")["GDType"]
  GDType
1   Byte

In your case that would be

attr(GDALinfo("MOD13Q1.A2001049.h13v11.005.2007002215512.250m_16_days_EVI.tif"),
"df")["GDType"]

If you just mean to read the data into R, then use readGDAL from the
rgdal package.  Extensions to this support that simplify some matters
are available in the raster package.

Cheers, Mike.

On Wed, Mar 28, 2012 at 3:40 AM, julio cesar oliveira <oliveirajc at ufv.br> wrote:
>>
>> Hi,
>>
>> I used
>> GDALinfo("MOD13Q1.A2001049.h13v11.005.2007002215512.250m_16_days_EVI.tif")  and
>> got the results:
>>
>> rows        10
>> columns     11
>> bands       1
>> origin.x        150701.4
>> origin.y        7744897
>> res.x       250
>> res.y       250
>> ysign       -1
>> oblique.x   0
>> oblique.y   0
>> driver      GTiff
>> projection  +proj=utm +zone=23 +south +datum=WGS84 +units=m +no_defs
>> file
>>  /MOD13Q1.A2001049.h13v11.005.2007002215512.250m_16_days_EVI.tif
>> apparent band summary:
>>   *GDType*   Bmin  Bmax Bmean Bsd hasNoDataValue NoDataValue
>> 1  *Int16* -32768 32767     0   0          FALSE           0
>> Metadata:
>> AREA_OR_POINT=Point
>> TIFFTAG_SOFTWARE=MODIS Reprojection Tool  v4.1 March 2009
>>
>>
>>
>> *How to read the information GDType?*
>>
>
> Thanks,
>
> julio
>
>        [[alternative HTML version deleted]]
>
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-- 
Michael Sumner
Institute for Marine and Antarctic Studies, University of Tasmania
Hobart, Australia
e-mail: mdsumner at gmail.com