My comment about imperfect aerial imagery is further reinforced by the pictures of Slovens Creek viaduct that is twisted like there was a big earthquake at its base, lol. This is one of the issues which can happen with aerial photography when the ground height modelling that they use miss an object that is above…

19 km on the Midland Line, west of Kirwee. Shall we say that is not an actual “bend” in the track, and is probably a mistake in the orthorectification process applied to this Linz imagery.

So we have shifted some of our focus to the Midland Line whilst continuing to work on the Christchurch area maps. We now have the full set of aerial photography we need to cover all of the Midland Line from Rolleston to Ross, as well as historical tiles of four stations in Canterbury: Darfield, Springfield,…

So here we are at Arthurs Pass with a selection of historic aerial photos dating from 1943, 1966 and 1971, the last of which being the NZR station surveys. We could also have made use of the NZR corridor survey of the early 1980s that we used for Otira. However, there would have been very…

The Midland Line has/had a number of branches, starting with Whitecliffs Branch and Oxford Branch in Canterbury, and progressing through to several on the West Coast. The longest of its branches has been the one from Greymouth to Ross, a total distance of just over 60 km. The history of railways in the Grey District…

This week the main focus is on the Midland Line because I need to update some maps of Otira for a requested requirement there. This means setting up a Volume 9 project in Qgis (it hasn’t been done yet, like several of the other volumes) and getting together all the base aerial photography for the…

I just did an evaluation of aerial photography availability for everything west of Otira. The answer is that there is no suitable historical aerial photography to do maps with west of Otira. The net outcome is there will not be detailed historical maps for the Midland Line beyond Otira, or the SNL in the near…

Last year I did some posts on the Midland and SNL, unfortunately most of the images from older posts have disappeared because of the change in my Google account. However this is only the second post on the Midland Line, so not much is actually missing. I am not planning to do a series of…