[OSM-dev] Clickable POIs - use marker/pushpin layer?
richard at systemeD.net
Tue Jan 8 11:53:35 GMT 2008
John McKerrell wrote:
> An advantage of using markers is the ability to give instant
> feedback, changing the mouse cursor to indicate that this is
> something you can actually interact with. It's possibly to do this
> without markers too but they are the simplest way.
It's hacky, but the Sustrans map has exactly the right approach on
_But_ I suspect this would boggle our servers too much (it certainly
does theirs ;) ) , so it would almost certainly have to be cached per
tile and then aggregated within OL, and good luck coding that.
(Seriously, good luck. I'd love to see it.)
But again, please, please don't ruin the cartography by putting a
whole load of markers all over it. To do this without the map looking
like a bollocks, you'd have to code automatic placement routines to
stop two markers appearing at the same place; and even then, they'd
overlay the road/place names so carefully placed there by
If you do want to go the marker route, then it absolutely needs to be
a separate layer which is not on by default. This might save server
Apologies for sounding like a cartofascist/palaeoStalinist. :)
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