Yes, thanks, i have just read up on Mercator, and its distortions (greenland teh size of africa), idealy I would like an equal area projection, but failed to find one, however since I don't have to be that accurate the Marcator one will do (might chop of the poles, as they are not really important to me).
I am having a challenge with Mercator, b\and a 3D map but will add that as a seperate thread. thanks ben On Jan 7, 10:09 am, Jonathan Wagner <[email protected]> wrote: > Ok, I thought that's what you might be trying to do. What I would > recommend is that you redraw the grid every time the view is changed > or rendered only for the viewport. Though I would suggest as you zoom > out you block off bigger areas, because a 100km grid when you're > zoomed all the way out would be something like 4000 lines. However > before you dive into this there is something you should be aware of, > your grid will not look like a grid, because of the Mercator > projection the squares will actually distort as you approach the north > and south pole. > > Jonathan > Scribblemaps.com > > On Jan 6, 4:13 pm, BenP <[email protected]> wrote: > > > thanks for the reply, but I don't think Tile Overlays will work, I > > want the overlay to remain constant land area, not screen area. > > I am looking to draw a grid with a fixed, real world size, lets say > > 100 km square, that remains at a constant 100km-sq regardless of map > > zoom. > > > I could draw a huge overlay for the whole globe, but this has to be > > very high rez to look any good, and seems wasteful given I am using a > > repeating grid pattern. > > > Obvioulsy the real world area of a tile changes drastically with zoom, > > as they are reative to screen space. > > > Thansk Ben > > > On Jan 7, 7:54 am, Jonathan Wagner <[email protected]> wrote: > > > > TileOverlays should work for you, it depends on how you want the grid > > > to be. For instance if you create a tile overlay that draws a red > > > outline box the size of 256x256 and overlay it on the map, you will > > > see red boxes around each of the tiles. Tile overlays only temporarily > > > scale if you have continuous zoom enabled on the map. > > > > Jonathan > > > Scribblemaps.com > > > > On Jan 6, 4:18 am, BenP <[email protected]> wrote: > > > > > New to the API so this may be a stupid question, but is it possible to > > > > create an overlay that tiles? I have looked at tile overlays, but > > > > these scale with zooming which beraks the result, I want a tiling full > > > > map overlay, so i can place my own grid upon it. > > > > > thanks > > > > Ben
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