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

[Bart van den Eijnden (OSGIS)]

Hi Franz,

check out OpenLayers.Tile.Image.

Best regards,
Bart

> 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
>>
>>
>


-- 
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