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MP2K Asks Microsoft
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How does zoom work
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August 2, 2002
Hi,
How does the zoom functionality work on MapPoint? Does it hit the database everytime or does it just toggle the finer details visible/invisible?
TIA
Craig
Answers:
August 5, 2002
I would imagine it hits the database every time if I am understanding you correctly. Imagine, at the U.S. zoom level, if it pre-loaded _all_ the data including layers invisible at that scale, it would be reading something like 1 GB of data. For the speed at which it draws the U.S.-level map, I can't imagine that's the case. - Eric
September 20, 2002
Every time you zoom, a new RenderService is Called from the Mappint Service, with the New Zoom Parameter set on the MapOptions Object e.g
Dim myMapOptions As New MapOptions()
myMapOptions.Zoom = myZoom
'The New Map is therefore Called
myMapImages = myRenderService.GetMap(myMapViews, myMapOptions, myPushPins)
Cheers
Kevo
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