I've been taking advantage of some enforced 'chill time' to add some detail around the Lunesdale and 'Wenningdale' area. Mostly in the form of transferring streams from NPE, but also marking and naming some crags and woodland I know of, and also adding riverbanks to the more significant rivers in the area.
I really do wish we had some detailed imagery of this area, instead of just the smallest zoom yahoo stuff; it would be so nice to add some up to date accurate features, like other areas of woodland, water, etc.

A word of warning to anyone mapping out in the sticks; if adding detail from NPE, be very CAUTIOUS about the reliability of the rectification of the maps. There is lots of advice elsewhere about how varied rectification is, some talking of accuracy only being within 2-4km of a given point; around here I'm lucky if NPE data is rectified for 2-400 metres! Try to make use of GPS data as a calibration for NPE data. Using potlatch, pressing G will give you all GPS tracks in the area being mapped; that helps to average out positional errors from just your own GPX tracings too.

I'm also pretty convinced that some of the rectification issues aren't just from when the original NPE maps were copied. Some of the 'errors' look to have occurred when the data was originally being recorded by OS - I guess, as in all other things, there were good and bad surveyors!

I've been mapping around Ingleton and Bentham in North Yorkshire, and have come across a nice little conundrum.

Two rivers run into Ingleton form the North and the NorthEast. On the NPE, the northernmost one is Kingsdale Beck; the northeastern one is shown as the Greta. After they join, both are called the Greta - no problem.

I map the area, and plot the rivers, including, from my local knowledge and various local sources, the present names of the rivers - the northern one now known as the Twiss, and the northeastern one the Doe (also marked as such on the current OS); once again, after they join, both are called the Greta - no problem again. If I'd left it there, it would be done, finito. BUT...

I carry on digging into local sources, just getting caught up in the local history thing, and today I have found compelling evidence that the names are all mixed up! According to a local historian, John Bentley, who cites some impressive references, including the local angling clubs and narratives of ancient boundary marking, the northern river is the Doe, and also known as Kingsdale Beck when it is in that dale, and the northeastern is the Twiss - another compelling piece of 'evidence' being that this river (keep up now- currently known by most as the Doe)flows through an area having Twisleton Scars, Twisleton Dale House - well, you get the picture.

The problem now is: do I map it as it apparently should be, or do I help perpetuate the mistake which even 'knowledgable' locals have made?

Answers on a postcard...

Phil
Tali'sman