Category: NZTekonverse -> Graphics
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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…
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![NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [5]: Overlaying Multiple Layers](https://patrickdunford.nz/wp-content/uploads/2020/05/Screenshot_2020-05-24_13-48-54.png)
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…
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![NZ Rail Maps: Using Gimp To Georeference Retrolens Aerial Photos [4]: Getting Started With Overlaying](https://patrickdunford.nz/wp-content/uploads/2020/05/Screenshot_2020-05-24_01-08-27.png)
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…
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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,…
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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…