Category: NZTekonverse -> Graphics

Escaping The Skylake 14nm Intel Architecture Circus

Once upon a time, there was the Intel Skylake CPU architecture. Skylake was introduced in 2015 for the sixth generation of the Intel Core CPU. Using the Intel tick-tock cycle, it was the tock component, the tick being its predecessor Broadwell. Broadwell introduced the 14nm process node to the Core architecture and after Skylake, there…

2023-09-03
Flatpak rollback to previous version of Gimp Beta

I did blog this before, but I have this time around had a successful instance of using this, because in this instance the application concerned did have sufficient commits available to roll back a point release. This example is the beta edition of Gimp, which I have been testing on a computer for some months.…

2022-03-26
Using Qgis Python Scripting in the NZ Rail Maps Project: 2 – Volumes Creation

The second and third aspects of Qgis scripting used in the NZ Rail Maps Project are connected with Volume maps creation. In the Volumes website, static map images are used. Each static image is manually composed, by positioning the map in the composer layout window, and combining the selection of different layers, rotation and zoom…

2021-08-05
PDF Editors For Linux

This post is brought to you by the new Blogger interface Google has forced on everyone! Which is dreadful! The only way I keep my sanity editing posts on Blogger is to create the post in a separate editor (LibreOffice Writer in this case) and then paste the completed article into Blogger. There is much…

2020-08-06
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [7]: Extracting Mosaic Tiles

So I have been trialling the alternative overlay method with more files and have decided to redo all the mosaics for Auckland so far. This is a few days’ work but as there are already some issues with accuracy in some of the more hilly areas or where the embankment is raised, it is going…

2020-06-02
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [6]: Alternate Overlaying Technique

Today I am going to look at an alternative way of stitching together the source layers. I have to do a set of mosaics for the station of Kamo, which is the northernmost part of Whangarei. From a rail perspective there were two stations there. Just a little south of Kamo there was a coal…

2020-05-25
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [5]: Overlaying Multiple Layers

So in my last post I showed how to get started in georeferencing with the first overlay. In that post I put the second layer in to show how it would join onto the first layer. The aim of this part is to show how to add additional overlays and how to deal with the…

2020-05-24
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [4]: Getting Started With Overlaying

So now we can look at how we actually do the georeferencing. This happens as a multi part process, and explaining the steps gives you an understanding of how it all works. The basic of georeferencing a historic aerial photo, is that by aligning it to a current aerial photo, of which we know the…

2020-05-24
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [3]: Getting Imagery Into Gimp

So let’s get this rolling. First thing I need is to download the layers from Linz Data Service. Which in this case is at the following URL: https://data.linz.govt.nz/layer/53399-northland-01m-urban-aerial-photos-2014-2015/ The layer is called Northland 0.1m Urban Aerial Photos (2014-2015) and covers the stations of Whangarei, Portland and Kamo. It also covers the port area of Whangarei,…

2020-05-23
NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [2]: Preliminary Considerations

So I aim to write one post every day about this topic (this post was supposed to be finished last evening but has stretched through until this morning) until all the parts are completed, there are probably three or four parts. This is easy because I am doing georeferencing at the moment on a particular…

2020-05-23