Category Archives: small things

More structural detail in hillshading with this one weird trick

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I wanted to have more structural detail in my QGIS live hillshading so I blended a duplicate layer with the sun angle set to directly overhead (90°) and the blending mode as darken.

It seems to make steep structures more prominent.

z/x/y.ext tiles to mbtiles/gpkg

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I just had some trouble converting a set of tiles I scraped into a nice package. I tried both mb-util and tiles2gpkg_parallel.py. Both seemed to work but QGIS did not display anything. The “solution” was to convert the tiles from 512×512 pixels to 256×256. WTF?

tiles2gpkg_parallel.py also crashed at joining its intermediate files if used in Python 3.6. It needs “-tileorigin ul” for OSM-like tile names.

Initial setup failed. Cannot continue. Error: Couldn’t run mojosetup

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If you are trying to install a game downloaded from gog.com but you get something like

$ ./gog_shadow_tactics_blades_of_the_shogun_2.2.0.3.sh
Verifying archive integrity… All good.
Uncompressing Shadow Tactics: Blades of the Shogun (GOG.com) 100%
Collecting info for this system…
Operating system: linux
CPU Arch: x86_64
trying mojosetup in bin/linux/x86_64
USING en_US

PANIC
Initial setup failed. Cannot continue.

Error: Couldn’t run mojosetup

then your file is corrupted or incomplete. You will have to re-download it. Ignore the “bin/linux/x86_64” path, that references something inside the installer, not something on your system.

Petition GOG to add checksums to their download pages or better yet, have reasonable download options that support resuming and HTTPS and what not…

e-foto (free GNU/GPL educational digital photogrammetric workstation) on Archlinux

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I wrote this a year ago and meant to write more. Turns out I did not but it still works. You might need to figure out dependencies yourself. Here you go:

e-foto is a free GNU/GPL educational digital photogrammetric workstation in active development.

svn checkout https://svn.code.sf.net/p/e-foto/code/trunk e-foto-code
cd e-foto-code/c
wget http://download.osgeo.org/shapelib/shapelib-1.3.0.tar.gz
tar xfv shapelib-1.3.0.tar.gz
mv shapelib-1.3.0 shapelib
cd ..
mkdir build
cd build
qmake-qt4 ../e-foto.pro 
make

Ready to run in

../bin/e-foto

A simple and hacky column chart in HTML & CSS

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This is a draft from two years ago, I just thought I would publish it in case it is useful for anyone. I don’t remember anything about it, not even what it was for. Feel free to use it in any way you like.

It looks like this:

htmlcsscolumnchart

#histogramcontainer {
height: 20%;
width: 10%;
background-color:#deebf7;
position:relative; /* To make the children's percentages relative */
 
/* setting position="absolute" bottom="0" on the histodivs makes them all overlay each other horizontally */
 
/* http://stackoverflow.com/questions/2147303/how-can-i-send-an-inner-div-to-the-bottom-of-its-parent-div */
-moz-transform:rotate(180deg);-webkit-transform:rotate(180deg); -ms-transform:rotate(180deg);
 
}
 
div.histogrambar {
float:left;
width:19%;
background-color:#3182bd;
}
 
div#histogrambar_a {height: 20%; margin-left: 1%;}
div#histogrambar_b {height: 10%; margin-left: 1%;}
div#histogrambar_c {height: 40%; margin-left: 1%;}
div#histogrambar_d {height: 100%; margin-left: 1%;}
div#histogrambar_e {height: 30%;}
<div id="histogramcontainer">
<div class="histogrambar" id="histogrambar_e"></div>
<div class="histogrambar" id="histogrambar_d"></div>
<div class="histogrambar" id="histogrambar_c"></div>
<div class="histogrambar" id="histogrambar_b"></div>
<div class="histogrambar" id="histogrambar_a"></div>
</div>