[OpenLayers-Users] Implementing a layer for a proprietary WMS-like service

[Franz Buchinger]

Hi Bart,

thanks for the fast and helpful response!

One question though: which class actually invokes the methods
OpenLayers.Layer.ArcIMS.getUrl and OpenLayers.Layer.getUrlAsync?

They seem to be overriden methods, but i couldn't find them in
OpenLayers.Layer.Grid or OpenLayers.Layer.HTTPRequest.

kind regards,

Franz

2010/8/3 Bart van den Eijnden (OSGIS) <bartvde at osgis.nl>

> Hi,
>
> I would advise you to look at OpenLayers.Layer.ArcIMS which uses a similar
> approach.
>
> Best regards,
> Bart
>
> > Hi,
> >
> > I'm a frontend developer and was programming a web viewer for a
> > proprietary,
> > WMS-like map service.
> > I discovered Openlayers one month ago and I'm really fascinated by its
> > awesome capabilities, so I decided to integrate our map service in
> > OpenLayers.
> >
> > Here is a short description how the map service works:
> >
> > The client sends an AJAX request containing the current map bounds, the
> > map
> > id and the pixel size of the map.
> >
> map=22&px=1720&py=833&left=2504400&right=2544000&top=5699500&bottom=5669500&type=0
> >
> > The server responds with the generated map image (url) and the corrected
> > bounds:
> > <MapProperties>
> >   <mapLeft>2493227.6110444176</mapLeft>
> >   <mapTop>5699500</mapTop>
> >   <mapRight>2555172.3889555824</mapRight>
> >   <mapBottom>5669500</mapBottom>
> >   <mapType>0</mapType>
> >   <overviewMap>22</overviewMap>
> >   <url>
> http://localhost/cgmCache/41600065-c3d2-4934-9feb-78a32f6668c8.png
> > </url>
> > </MapProperties>
> >
> > The maps are always single-tiled.
> >
> > My first approach was to write a ProprietaryMapLayer, that executes the
> > map
> > request and creates an ImageLayer with the result url and its bounds.
> > When the ImageLayer is moved, a new request is performed, the current
> > ImageLayer is destroyed and a new one generated. The disadvantage: there
> > are
> > now 2 layers representing one map, which leads to confusion in the layer
> > switcher control.
> >
> > I read over the code of Layer.WMS, which inherits from Layer.Grid and
> also
> > makes use of Tile.Image, but it's difficult to derive a solution from it,
> > since all the request/response handling is already integrated into the
> > layer. Furthermore, WMS simply responds with tile images, whereas I have
> > to
> > deal with an xml response.
> >
> > Any ideas how I could implement my layer?
> >
> > kind regards,
> >
> > Franz
> > _______________________________________________
> > Users mailing list
> > Users at openlayers.org
> > http://openlayers.org/mailman/listinfo/users
> >
>
>
> --
> Looking for flexible support on OpenLayers or GeoExt? Please check out
> http://www.osgis.nl/support.html
>
> Bart van den Eijnden
> OSGIS
> bartvde at osgis.nl
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/openlayers-users/attachments/20100803/fe73aa24/attachment.html