Hi,
On 01.02.2012 18:05, Frederik Ramm wrote:
Finally, I am looking at ways to visualize relations on the OSMI view.
If you have any ideas about that, feel free to suggest something.
I've been thinking about this and I believe that visualizing relations
in terms of making them actually visible on a map is a really
challenging task. What I've seen so far is Merkaartor's way of drawing
bounding boxes around a relation's members, and JOSM's highlighting with
some colour (also seen on various maps showing routes). The former,
however, clutters the map on small scales, and the latter in principle
works for a very limited number of relations only. So basically you want
to make sure that
- relation symbols are placed at representative locations,
- relation symbols don't occlude neither nodes or ways nor each other,
- the set of visible relations meaningfully relates to the map scale,
- the view doesn't get cluttered.
I have some immature ideas about how to go about it, but for the purpose
of OSMI I think you should prefer the quick and dirty way ;)
Display a list of relation IDs as plain text (or name tag instead, if
given) coloured according to the licence status. In order to keep the
list short, define upper and lower bounds for the maximum Euclidean
distance between two relation members in each zoom level. For ways
simply use the coordinates of the first node, for relations use those of
the first member.
cheers
ant
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