Jais Pedersen wrote:
@Lester: Did you try the merge layer feature in JOSM or did I misunderstand your
problem?
There may well be a a tool that does what I'm looking at ;)
I have several 'layers' of boundary data, and SOME of the lower level 'ways' are
used to define the same boundaries above, so in order to make a single layer,
each shape needs to be broken down into a set of ways so we have a unique set of
ways and a set of relations that select a 'closed loop' from the available set
of ways for each of the original shapes. Building a database of the nine layers
of shapes is the easy bit, as I already have that in another application anyway.
It IS merging the ways from each layer and working out where to break the
original shapes from each layer so they can be recreated simply be selecting the
correct combination of way segments. Some segments are used on all 'boundary
layers' while others only fill the gaps on perhaps on or two. In my naive way of
working, it's looks like just identifying every node that matches from layer to
layer and ending up with the biggest set of nodes that match. Merging onto the
base OSM map should just be a version of the same process since a small subset
of the ways have already been merged, or features already on the map may be
usable in the matching process. Where it falls over is where in my case the OS
borderline data has a large number of nodes which have been 'stylised' on the
map already so do we throw away the more complex import data or keep the
simplified view? Manual intervention on the merge process.
BUT it does make more sense to me to keep the bulk of this imagery ON a separate
database since displaying it or not should be optional at the viewer?
--
Lester Caine - G8HFL
-----------------------------
Contact - http://lsces.co.uk/wiki/?page=contact
L.S.Caine Electronic Services - http://lsces.co.uk
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Model Engineers Digital Workshop - http://medw.co.uk
Rainbow Digital Media - http://rainbowdigitalmedia.co.uk
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