|Cassini Support in geo_helper.py
||[Dec. 12th, 2006|06:21 pm]
old maps, we've come across quite a few pre-National Grid maps. These are mainly of Scotland, and as we do have a few of these for places needing coverage, we're going to need to work with them.With our work on |
These maps are projected with a Cassini-Soldner projection, which was quite popular in the 19th century. It's apparently easier to work with than the more modern grid systems (eg Mercator), but is only suitable for areas with a larger north-south distance than an east-west one (handily like the UK).
In other news, we've been busy adding a few more bits of Scotland to npemap. If you look on the front page, you'll see we now have coverage of a fair bit of the mid-east coast. Quite a bit more to go though....