Re: [GRASS-user] Retrieve pixel resolution using Python, Script
Thanks Eloi but this only gives me the number of pixels (number of lines and columns) not the pixel resolution. Is there a retrieve this information in a Python script (e.g. using python GDAL)? Thanks Antonio __ Information from ESET NOD32 Antivirus, version of virus signature database 5236 (20100629) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Retrieve pixel resolution using Python Script
Hello Mark I know that I can retrieve that information with gdalinfo. But I need to have it on a variable and get/use it in a Python Script. Mark Seibel wrote: If you use gdalinfo on an image, it will output the "Pixel Size". Hope that helps. Mark 2010/6/28 António Rocha : Greetings I'm trying to retrieve an image (not yet imported to GRASS) pixel resolution through a Python Script but so far i was unable to figure out a method to do this. Is this possible? I have used g.proj to retrieve its projection and datum but not the Pixel resolution. THanks for your help Best regards, Antonio R. __ Information from ESET NOD32 Antivirus, version of virus signature database 5234 (20100628) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user __ Information from ESET NOD32 Antivirus, version of virus signature database 5234 (20100628) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 5235 (20100628) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Retrieve pixel resolution using Python Script
Olá António Rocha,
This works for me, give it a try:
###
import os
try:
from osgeo import gdal
from osgeo import osr
except:
import gdal
import osr
def gdalinfo(pasta):
'''Le metadados com GDAL'''
ficheiros = os.listdir(pasta)
for ficheiro in ficheiros:
if ficheiro[-3:].lower() == 'tif':
# abrir imagem
filename = pasta+ficheiro
dataset = gdal.Open(filename, gdal.GA_ReadOnly)
if dataset is None:
print 'Nao foi possivel abrir a imagem %s!' % ficheiro
RasterXSize = dataset.RasterXSize
RasterYSize = dataset.RasterYSize
print RasterXSize,RasterYSize
print '\nfim'
return
gdalinfo('/home/eloi/Geo/raster/20790/')
###
2010/6/28 Mark Seibel
> If you use gdalinfo on an image, it will output the "Pixel Size".
>
> Hope that helps.
> Mark
>
> 2010/6/28 António Rocha :
> > Greetings
> >
> > I'm trying to retrieve an image (not yet imported to GRASS) pixel
> resolution
> > through a Python Script but so far i was unable to figure out a method to
> do
> > this. Is this possible? I have used g.proj to retrieve its projection and
> > datum but not the Pixel resolution.
> > THanks for your help
> >
> > Best regards,
> > Antonio R.
> >
> >
> > __ Information from ESET NOD32 Antivirus, version of virus
> signature
> > database 5234 (20100628) __
> >
> > The message was checked by ESET NOD32 Antivirus.
> >
> > http://www.eset.com
> >
> >
> > ___
> > grass-user mailing list
> > grass-user@lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/grass-user
> >
> ___
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
--
Eloi Ribeiro
GIS Analyst
39,45º -4,40º
http://eloiribeiro.wordpress.com
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Re: [GRASS-user] Retrieve pixel resolution using Python Script
If you use gdalinfo on an image, it will output the "Pixel Size". Hope that helps. Mark 2010/6/28 António Rocha : > Greetings > > I'm trying to retrieve an image (not yet imported to GRASS) pixel resolution > through a Python Script but so far i was unable to figure out a method to do > this. Is this possible? I have used g.proj to retrieve its projection and > datum but not the Pixel resolution. > THanks for your help > > Best regards, > Antonio R. > > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 5234 (20100628) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Retrieve pixel resolution using Python Script
Greetings I'm trying to retrieve an image (not yet imported to GRASS) pixel resolution through a Python Script but so far i was unable to figure out a method to do this. Is this possible? I have used g.proj to retrieve its projection and datum but not the Pixel resolution. THanks for your help Best regards, Antonio R. __ Information from ESET NOD32 Antivirus, version of virus signature database 5234 (20100628) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
