Andres Toussaint wrote:
Do you want to keep track (i.e. store it) of your overlay information? or will it be volatile, on a per session basis?Volatile, I Don't see any reason to embed them in the SVG and/or let it be "saveable". But if the option can be kept open relatively easy, it would of course be better. But primarily I want to be able to update the display often without any slow renders.
You want to have the position-indicator to remain the same size (on screen), regardless of the zoom level of your map, right?
Undecided. I'd like the coordinate-mapping between the overlay and the map to stay the same if possible. But I guess a constant-sized indicator will look better. The problem is, we might have to indicate areas of the map, if our positioning engine is not precise enough, in that case, the tranparent circle, rectangle, whatever, will have to scale with the map
You want to indicate access routes, elevator position, etc. Right?
Not sure I know what you mean by this. But I could imagine indicating exits, stairs and such with a highlighted area. But I guess that could be done in the SVG, but having it in the overlay would of course allow for switching it on and off. And that would be a nice feature.
Not sure what you mean here either. The new positions will arrive as UDP datagrams from the positioning backend/engine and when they do, the indicator should move. When it gets closer to the edge of the zoom, the map should pan. So both I guess. But if one option is terribly complex, then the simpler might have to do.
How are the new positions will be calculated? By moving the indicators, or by modifing the Zoom-pan of the map?
Lasse Riis
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