On 10/31/10 6:16 AM, Andrea Pogliaghi wrote:
Hi everybody,
I am having a problem in displaying an OSM layer with openlayers.
Basically I want to cover a certain region and I want to limit the zoom
between two levels (let's say 10 and 17). I investigated a bit in the
matter but it seems OSM layer doesn't take into account the "minLevel"
parameter, it only lets you set the overall max number of levels, but it
always start from level 0.
You start at an arbitrary zoom level by supplying the zoomOffset
property to the layer configuration.
http://dev.openlayers.org/apidocs/files/OpenLayers/Layer/XYZ-js.html#OpenLayers.Layer.XYZ.zoomOffset
If you are explicit in setting map related properties, you can get what
you want by configuring the layer with a zoomOffset (this indicates the
difference between map zoom level 0 and tile source zoom level 0).
http://openlayers.org/dev/examples/xyz-offset.html
This example demonstrates pulling tiles from a subset of an ArcGIS
cache. The same can be done for an OSM tile cache.
Tim
I did some research and I found this:
http://trac.osgeo.org/openlayers/ticket/2189.
I applied the patch on my version of openlayers and now it seems working.
I am wondering if there is a reason why the patch hasn't been applied in
the codebase? Does the patch fix the issue but breaks something else?
thanks
andrea
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Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.
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