Now that I have figured out how to load and unload image layers on
zoom change, I am trying to wrap my head around mapping coordinates to
pixels. The aim is to pre-create a bunch of images that are loaded
one-to-one to give the sharpest image no matter the zoom level. I have
the following coords
map:
# map image in pixels
width : 800;
height: 360;
# world coordinates in spherical mercator
xmin : -20037508.34
ymin : -20037508.34
xmax : 20037508.34
ymax : 20037508.34
maxres: 156543.03
start_zoom: 8
aoi:
# aoi image in pixels
width : ? # 244
height: ? # 184
# aoi world coordinates
xmin : -10179111.60
ymin : 5638990.53
xmax : -9829162.44
ymax : 5903962.12
In other words, I want to figure out what the size of my image should
be at the default zoom level 8 so it shows up as is, without any
stretching or shrinking. And, I want to figure out the same at other
zoom levels from 1 through 10.
Nudge me in the right direction, por favor.
--
Puneet Kishor
_______________________________________________
Users mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/openlayers-users
