Month: October 2018
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Computing resources optimisation [2A]
So after a couple of months ago when I did some resource optimisation with my existing computers, it’s time to look at the next stage. That stage will be upgrades to enable all four computers to be used for the most stuff they can. The plan I am considering at the moment (subject to resourcing)…
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Graphics issues with map mosaics [3]
Continuing from the previous post in this series. Once you have made up some mosaic tiles you need to know how to edit the sidecar files. In this case with the map tiles that come from LDS there are three sidecar files alongside the actual image. We only need to concern ourselves here with the…
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Graphics issues with map mosaics [2]
As I wrote in my last post there are problems when you have to scale down imagery significantly. So I am working on a new map mosaic experiment to see what I can do with it. Starting from four tiles at 0.4 metre resolution i.e. 1 pixel measures 0.4 metres on one side, I am…
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Graphics issues with map mosaics [1]
Well this is a tricky little number for people like me who are doing things with high resolution images. I am frequently combining high resolution scanned Retrolens stuff with other aerial images and running into some scaling issues. Basically if I have got a Retrolens image at a certain resolution and I have the aerial…
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Limits.conf settings to allow a lot of file handles
One of the things I always have to remember to do for Qgis is for each time I install a computer or VM is to change the default settings in /etc/security/limits.conf to allow a larger number of file handles. Otherwise Qgis can’t open a lot of layers at once. Open this file and put the…
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Setting a custom content width on Blogger’s Simple template
Most of my Blogger blogs use the Simple template; I haven’t got much time or inclination to scroll through masses of templates and experiment. You can use the theme designer or you can directly edit the HTML to change some settings. On some of my blogs I have directly edited the HTML to set a…
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Apps, apps, apps
I don’t write much about mobile so it’s time to fill in this gap by blogging about some of the apps I have on my various phones. The main phone I have is a Nexus 5X, and I have a second phone, a Galaxy J2, which has a tablet share SIM (off the Nexus’ account)…
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HOWTO: Enable root login in KDE / Debian
UPDATE: Since I discovered Ctrl-Alt-F1 and found I could root login there and have no problems, I have not bothered modifying any KDE computer to enable the root login. Last time I wrote that I needed to try a new user profile on serverpc because of issues resuming from hibernation. This has proved to be…