[OpenLayers-Users] stitch together multiple maps?

[Eric Lemoine]

On Thu, May 15, 2008 at 7:33 PM, Wendell Turner <wendell at enflight.com> wrote:
> I have several GeoTIFF images and each shows up just fine
> (by itself, using gdal2tile to break them up).
>
> How do I use OpenLayers to show a patchwork of maps?  That
> is, the left edge of one is the right edge of the other; the
> bottom of one is the top of yet another, etc.  In fact, I
> have lots of these that form a mosaic of a given area.
>
> Should I use gdalxxx to put them together to form one (very
> large) map and then use gdal2tile to break it up, or craft
> OpenLayers.Layer.TMS.prototype.getURL to determine which
> patch to get?  If the latter, how do I reference everything
> in lat/lon degrees instead of pixels?
>
> Is there an example of this in the openlayers example
> section?  I looked, but since I'm new to OpenLayers, I'm not
> sure what I was seeing, or what I should be looking for.

You can use gdal2tiles to generate tiles in a TMS structure and use
OpenLayers.Layer.TMS to access these tiles. See
<http://www.gdal.org/gdal2tiles.html> and
<http://www.openlayers.org/dev/examples/tms.html>.


Cheers,

--
Eric