Category: NZTekonverse -> Gimp
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NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [1]: Introduction
OK so here is another post in the NZ Rail Maps category and this post will explain how I carry out the georeferencing of the historical Retrolens aerial photos to produce the maps for the NZ Rail Maps project. This is a very rewarding aspect of the project but it does take a lot of…
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New “Readjust” feature in Gimp Unified Transform (NZRM Aerial Mosaics)
Unified Transform is a very useful capability in Gimp since about 2.10 that combines a number of transformation tools together, such as Scale, Rotate and Shear. I have used this tool extensively when creating aerial map mosaics for the NZ Rail Maps project. To create an aerial map mosaic, I start with downloading the current…
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NZ Rail Maps Technical Review 2020-04-18
So we are now at Qgis version 3.10.4 for the NZ Rail Maps map production task. Back a way we had a lot of trouble with Qgis with WMTS layers which were unusable at that time. Since then however we haven’t been able to replicate the problem but we suspect that their code has bugs…
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Rolling back a Flatpak application to a previous version
Today on my main graphics editing PC, I decided to update Gimp from 2.10.16 to 2.10.18. Which should have been OK. Except that it wasn’t. I have spent all day dealing with Gimp crashing during saves and trying to work around with ever smaller files to be saved. It did crash last night as well…
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NZ Rail Maps: Large Area Raster Tiles At Reduced Quality Setting
Using Qgis to draw the maps, we’ve run against a few times some sort of limitation on the number of raster layers that it seems to have, which runs out a long time before hitting the actual resource limits of the computer it’s running on. This in turn limits the number of raster layers that…