I've just invested in a couple of new OS Explorer maps for the South Pennines and the Forest of Bowland with the new CROW information.
Just looked at the South Pennines map and noticed that the contour interval is 5m compared to 10m for every other map I seem too own (Explorer, Outdoor Leisure and Landranger).
I though the OS would have a standard interval for contours over the series but it seems not.
Is this just an isolated case or do people know of other maps with different intervals.
Andy Laycock wrote on Sat, 9 Oct 2004 22:40:17 +0100....
Quoted message said:
I've just invested in a couple of new OS Explorer maps for the South Pennines and the Forest of Bowland with the new CROW information.
Just looked at the South Pennines map and noticed that the contour interval is 5m compared to 10m for every other map I seem too own (Explorer, Outdoor Leisure and Landranger).
I though the OS would have a standard interval for contours over the series but it seems not.
Is this just an isolated case or do people know of other maps with different intervals.
I have a 1984 OL21 (South Pennines) and a 1994 OL24 (White Peak) which both have a 5m contour interval.
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Quite normal.. 1:25000 mapping has a 5m contour interval. However to cut the dear old OS's brown ink bill the interval is 10m in hilly areas. What constitutes a hilly area is up to them, but I think its a sensible comprimise.. Better than the 50m interval that arbitarialy appears on hills on the 1:50k maps. The origins of this are in the original 1:10k maps (5*5km squares)
Sometimes hills get through at 5m. The Ochils being a good example. They look mental on a 1:25k map
Wether Hill, south of Edinburgh appears on two sheets of the explorer series at both intervals, makes an interesting comparison.
As long as the contours are visible, not replaced by purple [censored], I dont mind.. Looks like they have done a reasonable job in marking the nogo areas on the current maps.
