[OpenLayers-Dev] two newbie questions
alan.borden at gmail.com
Mon Oct 30 18:21:27 EST 2006
I wasn't sure if maybe the dev list was a better place for the questions, so
I'm reposting with some more details.
I did attempt to solve this on my own through some google searching and
found a thread with several of the openlayers developers discussing tiling
One of the options mentioned was IIPImage which also seems geared toward
just photos, similar to gsiv, but there was no indication that it would
work with openlayers - and my understanding was that ka-map produces tiles
via a php script, but only for mapserver.
Looking at the settings available in openlayers, I assume it's the
projection parameter in openlayers I should be concerned with (?). I have
very little familiarity with cartographic semantics, so I just need to know
if I am on the right track. So is there a way to set a simple cartesian
coordinate system projection and feed in 256x256 tiles that are in a
directory with filenames like this:
This tile structure is what I currently get out of gsiv, but I'm happy to
use any tiling script that would make getting started with openlayers
painless. I don't care about caching, etc. yet, but I would like to use the
I'd like to use this as a tool in my MSc. project in wildlife biology, but
I'm running out of time to submit my proposal. I've found a few other tools,
but openlayers seems to have the nicest client.
On 10/26/06, Alan Borden <alan.borden at gmail.com> wrote:
> 1. I previously played with gsiv<http://www.mojavelinux.com/projects/gsiv/>and their python
> tiling script<http://panojs.googlecode.com/svn/trunk/scripts/tilemaker.py>,
> but it was missing many of the features that openlayers has. Can I take the
> tiles generated by this script and use them in openlayers? Or, is there
> another simple tiling solution I should consider for use with openlayers?
> I don't have map data just very large images - like the mars rover image on
> the gsiv demo. Also, will I be able to define my own common coordinate
> system for these images using some arbitrary scale instead of lon/lat? I
> wasn't sure if openlayers was only intended for map data...e.g. I noticed
> the api calls were named lon or lat for coordinates
> 2. I noticed mentions of a vector graphics layer for openlayers. A project
> called dojo recently added vector graphic support in the 0.4 release, plus
> a local data store cache, and documentation tools (both of which I also saw
> mentioned in your Trac logs). So I was wondering if the openlayers team had
> seen or considered the dojo library?
> 3. Have you considered providing the 'dynamic scale bar' as dynamic x/y
> axes on the viewer box? So rather than a little scale bar, a scaled labelled
> axis would be drawn on the vertical/horizontal components of the viewer box
> each time the pan/zoom status is updated? It seems more intuitive and
> informative to me.
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