[GRASS-user] Exporting RGB Composite Images to GeoTIFF

Moritz Lennert mlennert at club.worldonline.be
Fri Jul 22 03:20:17 PDT 2016


On 22/07/16 11:33, Helmut Kudrnovsky wrote:
> Moritz Lennert wrote
>> On 21/07/16 16:27, Markus Neteler wrote:
>>> Hi,
>>>
>>>
>>> On Thu, Jul 21, 2016 at 2:53 AM, Michele Toma
>>> <
>
>> michele.toma@
>
>>  <mailto:
>
>> michele.toma@
>
>> >> wrote:
>>>
>>>     Hi everyone (again),____
>>>
>>>     __ __
>>>
>>>     I am having trouble exporting a composite RGB image into a GeoTIFF
>>>     format that I can open in Global Mapper, Photoshop, or other
>>>     programs. This is using Landsat 8 imagery. I am able to open the
>>>     composite image in QGIS, but not in Global Mapper or Photoshop. ____
>>>
>>>     __ __
>>>
>>>     Below is a list of steps that I took to get the image. I am unsure
>>>     of what settings to use when using r.out.gdal to export my image so
>>>     that it works in other programs. I am using GRASS 7.0.4.____
>>>
>>>     __ __
>>>
>>>     __1.       __Import Landsat 8 imagery____
>>>
>>>     __2.       __Convert the DN to reflectance/radiance____
>>>
>>>     __a.       __i.landsat.toar input=LC81100362016082LGN00_B
>>>     output=LC81100362016082LGN00_refl
>>>     metfile=LC81100362016082LGN00_MTL.txt____
>>>
>>>     __3.       __Perform pansharpening with i.fusion.brovey addon____
>>>
>>>     __a.       __i.fusion.brovey -l
>>>     ms1=LC81100362016082LGN00_refl2 at Osaka
>>>     ms2=LC81100362016082LGN00_refl3 at Osaka
>>>     ms3=LC81100362016082LGN00_refl4 at Osaka
>>>     pan=LC81100362016082LGN00_refl8 at Osaka output_prefix=brovey
>>>
>>>
>>> BTW: this method is superior (the addon can be installed with
>>> g.extension):
>>> https://github.com/NikosAlexandris/i.fusion.hpf
>>
>> The addon is not in the addons repository, so you cannot install it with
>> a simple g.extension i.fusion.hpf. In GRASS 7.2 / trunk you can install
>> it with g.extension by downloading the source code and pointing the url=
>> parameter of g.extension to the source code directory.
>>
>> I hope that the code will be put into the addons repository, soon.
>
> from https://grass.osgeo.org/grass72/manuals/g.extension.html
>
> Online repositories: GitHub, GitLab and Bitbucket
>
> For well known general hosting services, namely GitHub, GitLab and
> Bitbucket, g.extension supports the download of a repository as a ZIP file.
> Here the user only needs to provide a base URL to the repository web page
> (with or without the https:// part). For GitLab and Bitbucket, the latest
> source code in the default branch is downloaded, for GitHub, the latest
> source code in the master branch is downloaded. Of course, a user can still
> specify the full URL of a ZIP file and install a specific branch or release
> in this way (ZIP file mechanism will be applied).

Right. Forgot about this.

g.extension i.fusion.hpf url=https://github.com/NikosAlexandris/i.fusion.hpf

works perfectly in 7.2 and trunk, but not yet in 7.0 which is still the 
official stable release.

Thanks for the heads-up !

Moritz


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