Category: NZTekonverse -> Qgis
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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…