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Fields & Hedges

jpsa님이 English로 2012년 9월 18일에 게시함.

Many surrounding areas have been getting fields filled in, so I thought I’d better do Teversham before it started looking like an embarrassingly empty gap in the map. This turned out to be a more complicated exercise than I’d expected!

There are several kinds of field boundary round here: tracks, roads, hedges & fences, drainage ditches, sometimes a change in ground level, or sometimes no boundary at all. Sometimes it’s ambiguous and I’ve had to make judgement calls: often a fence will have become sufficiently overgrown to constitute an effective hedge for some of its length. Ditches, too, often have bushy stuff growing, more or less impenetrably, along at least one side.

Sometimes, too, I can’t get close enough to a field boundary to be sure what it consists of, and nor is it clear from the aerial photgraphy. Mostly I’ve settled on a likely guess, but occasionally I’ve just had to leave the barrier out (but leave a gap between the fields).

Then there’s the question of whether the field areas should share nodes with the barriers which surround them. After a bit of experimentation, I’ve settled on generally sharing nodes with hedges and fences, but to offset from ditches, roads & tracks. This reflects the reality that farmers generally seem to plough pretty much right up to hedges and fences, but not to ditches, roads or tracks. It also renders reasonably attractively.

위치: Teversham, South Cambridgeshire, Cambridgeshire, Cambridgeshire and Peterborough, England, United Kingdom
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토론

2012년 9월 18일 12:46Sanderd17님의 의견

Regarding the connection of nodes between fiels, I do agree with your views.

Streets and streams have a certain width, big enough to mention. So the ways representing them should represent the middle line, while the field already stop at the border of the way, not on the middle line.

For fences and hedges, it’s different, as they normally have a very small width, they exactly represent the boundary of the field, so they can be mapped on the end nodes.

2012년 9월 18일 14:54dcp님의 의견

I too agree with your thoughts. I, however, do not know how to tag certain barriers like a line of trees: In fact it may not even be a barrier as you can go through the line. Another tag I can’t find is one to map a grass verge, i.e. that area that may separate a field from a hedge, road, etc. I suppose landuse=grass will do the job well enough. But what do you do when a verge has been planted with bushes? natural=scrub does the job but it is not natural, is it?

2012년 9월 21일 00:06robert님의 의견

“natural=scrub does the job but it is not natural, is it?”

But then again nothing is in England. It was almost all thick forest until humans came along.

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