To reduce size this guide is still good:
http://blog.cleverelephant.ca/2015/02/geotiff-compression-for-dummies.html
/Lars S.
Den 2021-02-04 kl. 21:00, skrev Pteroglossus via gdal-dev:
Richard, thanks you for your support, I would not have done it without you!
I tried to convert one of my files as suggested:
k@k-GS60-6QE:/media/k/Data/Data/Perso/Carto$ gdal_translate -of GTiff
SCAN50_2012.ecw SCAN50_2012.tif
Input file size is 75000, 95000
0...10...20...30...40...50...60...70...80...90...100 - done.
It turned my 2.3GB .ecw into a ...21.4GB .tif. There must be some arguments to
be added in order to reduce the size of the output file. Any ideas?
As for installing GRASS GIS, I suspected it wouldn't be as easy as a normal
apt-get install...
Thanks Markus for your input, I read the Quick_instructions for Ubuntu 20.04,
and it seems doable. One question though, I won't install GDAL as a
prerequisite as instructed because I've compiled it myself, right?
Therefore, I'm gonna need to tell the compiler to get GDAL from the folder it's
been installed in. The only reference to GDAL in the guide, apart from the
prerequisite install is:
# "configure" source code for local machine (checks for CPU type etc):
MYCFLAGS='-O2 -fPIC -fno-common -fexceptions -std=gnu99 -fstack-protector -m64'
#MYCXXFLAGS=''
MYLDFLAGS='-Wl,--no-undefined -Wl,-z,now'
LDFLAGS="$MYLDFLAGS" CFLAGS="$MYCFLAGS" CXXFLAGS="$MYCXXFLAGS" ./configure \
--with-cxx \
--enable-largefile \
--with-proj --with-proj-share=/usr/share/proj \
--with-gdal=/usr/bin/gdal-config \
I happen to have a "gdal-config" in /usr/bin/ but it must be a remnant of a
previous install because the creation date is March 29th 2020. Should I change the
argument to
"--with-gdal=/home/k/bin/gdal/gdal-3.1.4/bin/gdal-config" which is the location
of the one I compiled?
Best,
Kevin
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, February 4, 2021 6:25 AM, Markus Neteler <nete...@osgeo.org> wrote:
On Thu, Feb 4, 2021 at 9:28 AM Richard Duivenvoorde rdmaili...@duif.net wrote:
On 2/4/21 1:55 AM, pteroglos...@pm.me wrote:
Installing libproj-dev did the trick, I was able to run the config file, rename/copy the necessary
folders in the SDK, then "make"/ "make install", encountered some issues during
the process but:
k@k-GS60-6QE:~/bin/gdal/gdal-3.1.4$ gdalinfo --version
GDAL 3.1.4, released 2020/10/20
k@k-GS60-6QE:~/bin/gdal/gdal-3.1.4$ gdalinfo --formats|grep ECW
ECW -raster- (rw+): ERDAS Compressed Wavelets (SDK 5.5)
JP2ECW -raster,vector- (rw+v): ERDAS JPEG2000 (SDK 5.5)
This means it worked, doesn't it? :)
YES!!! You compile GDAL with ecw yourself! congrats!
...
Not sure if you can fool GRASS to use your own compiled GDAL (by creating some
symbolic links, OR by installing your GDAL in the normal /usr/lib), that
depends on which version GRASS is actually build against (I think...)
My guess is that you have an older distro, which does not have GDAL 3.1
(because you started of compiling GDAL 2.4.x or so) so the symbolic links will
not work (I think...).
So others? Is there a way (other then let this user also compile GRASS against
his newly compiled GDAL 3.1)?
I'd recommend to just compile also GRASS GIS locally (which is rather
easy) to avoid a dependency hell.
See (unsorted):
- Debian:
https://grasswiki.osgeo.org/wiki/Compile_and_Install#GRASS_7_on_Debian_Buster
- Ubuntu:
https://grasswiki.osgeo.org/wiki/Compile_and_Install_Ubuntu#Quick_instructions
- Fedora:
https://grasswiki.osgeo.org/wiki/Compile_and_Install#GRASS_GIS_7_on_Fedora
- Linux Mint: https://grasswiki.osgeo.org/wiki/Compile_and_Install#Linux_Mint
- Windows:https://grasswiki.osgeo.org/wiki/Compile_and_Install#MS-Windows
- MacOS: https://grasswiki.osgeo.org/wiki/Compile_and_Install#macOS
etc. on that Wiki page.
Most of them are copy-paste instructions.
HTH,
Markus
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