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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: [gislist] Software for images resampling |
| Date: |
02/01/2006 07:15:01 AM |
| From: |
Frank Warmerdam |
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On 2/1/06, Calin Nitu <calin.nitu@teleatlas.com> wrote:
> Dear List members,
>
> I am looking for a simple software (freeware/low cost) able to resample (over sample) an image.
> By image I mean satellite or aerial pictures but also DEMs (signed integer - 16 bits) in GEOTIFF.
> The output shoud be also GEOTIFF.
>
> I tried IDRISI and BEST Software (ESA). Any others ....?
Calin,
You can use the free gdalwarp utility to oversample an image.
It offers nearest neighbour, bilinear and bicubic resampling
kernels. It is part of the GDAL package, but is possibly most
easily used from the FWTools suite.
http://www.gdal.org/
http://fwtools.maptools.org/
An example of resampling a satellite image to a 2m pixel size
with a bilinear resampling kernel might look like:
gdalwarp -tr 2 2 -rb in.tif out.tif
Gdalwarp can also reproject and mosaic images.
http://www.gdal.org/gdalwarp.html
By the way, you didn't indicate if/when IDRISI and Best
Software's offerings might be inadequate to your needs.
Without knowing that it may be hard for people to suggest
better options.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
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