[Tilecache] [Geoserver-users] GeoServer + TileCahe + WMS +
OpenLayer = Doesnt work
Xiaoyu Guan
guanxiaoyu at gmail.com
Fri Jul 25 04:04:58 EDT 2008
Dear All:
Thanks Justin.
I would like to tell you, the problem have been solved. I found one post of
tilecache mailing list.
*Neither OpenLayers nor TileCache is configured correctly. OpenLayers is
missing any kind of 'maxResolution' or other resolution-setting option,
and TileCache is missing maxresolution and bbox.
"The most important thing to do is to ensure that the OpenLayers Layer
has the same resolutions and bounding box as your TileCache layer. You
can define the resolutions in OpenLayers via the 'resolutions' option or
the 'maxResolution' option on the layer. The maxExtent should be defined
to match the bbox parameter of the TileCache layer." --
http://tilecache.org/readme.html*
So my configure have change into Tilecache
[mylayer1]
type=WMSLayer
url=http://127.0.0.1:2008/atrium/wms
layers=topp:GroupLayers
bbox=0,300000,310000,610000
extension=png
srs=EPSG:28992
maxResolution=3000
metaTile=true
debug=yes
mime_type=image/png
then the openlayers script
var map;
var tiled;
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 5;
OpenLayers.DOTS_PER_INCH = 25.4 / 0.28;
function init(){
var bounds = new OpenLayers.Bounds(
0,300000,
310000,610000
);
var options = {
controls: [],
maxExtent: bounds,
maxResolution: 3000,
projection: "EPSG:28992",
units: 'm'
};
map = new OpenLayers.Map('map', options);
// setup tiled layer
tiled = new OpenLayers.Layer.WMS(
"topp:osmLine - Tiled", "
http://127.0.0.1:2010/tilecache/tilecache.py",
{
width: '590',
srs: 'EPSG:28992',
layers: 'mylayer1',
height: '550',
styles: '',
format: 'image/png',
tiled: 'true',
tilesOrigin : "0,300000"
},
{buffer: 0}
);
map.addLayers(tiled);
// setup controls and initial zooms
map.addControl(new OpenLayers.Control.PanZoomBar());
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.Scale($('scale')));
map.addControl(new OpenLayers.Control.MousePosition({element:
$('location')}));
map.addControl(new OpenLayers.Control.LayerSwitcher());
//map.addControl(new OpenLayers.Control.OverviewMap());
map.zoomToExtent(bounds);
}
Finally, it works, but I see another problem, when I load the map, some tile
images are not pink images or maps, it is just blank and the browser already
stop loading images. Then if you refresh the browser, sometimes it load
again. I thought I could solve it via OpenLayers.IMAGE_RELOAD_ATTEMPTS , but
it doesnt work.
All the best
Xiaoyu
On Fri, Jul 25, 2008 at 4:22 AM, Justin Deoliveira <jdeolive at openplans.org>
wrote:
> Hi,
>
> It would be helpful to know if requests are making it to the GeoServer
> backend. Can you clear your tile cache, reload open layers and then watch
> the GeoServer request log? If you see requests go by including the request
> log would be useful.
>
> -Justin
>
> Xiaoyu Guan wrote:
>
>>
>>
>>
>> Dear list:
>>
>> I have successfully setup GeoServer1.6 (Apache Tomcat) +
>> Tilecache(Apache2.2 + mod_python) + OpenLayer + WMS
>> I have already test my Geoserver and tilecache , both of them are work. I
>> used the default examples of Geoserver. However, when I setup my own data
>> layers for tilecache. it doesnt work.
>> For example,
>> I have WMS link like this:
>>
>> http://127.0.0.1:2008/geoserver/wms?bbox=-77498.10277191945,252450.97991880335,343091.0787104775,680814.505391243&styles=&Format=application/openlayers&request=GetMap&version=1.1.1&layers=topp:Mydatalayer&width=590&height=550&srs=EPSG:28992<
>> http://127.0.0.1:2008/geoserver/wms?bbox=-77498.10277191945,252450.97991880335,343091.0787104775,680814.505391243&styles=&Format=application/openlayers&request=GetMap&version=1.1.1&layers=topp:Mydatalayer&width=590&height=550&srs=EPSG:28992
>> >
>>
>>
>> and I setup tilecache like this in .cfg file
>>
>> [topp]
>> type=WMSLayerw
>> layers=topp:Mydatalayer
>> url=http://127.0.0.1:2008/geoserver/wms
>> extension=png
>> srs=EPSG:28992
>>
>> and my OpenLayer script like this
>>
>> var lon = 7.37;
>> var lat = 52.1;
>> var zoom = 10;
>> var map, layer;
>>
>> function init(){
>> OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
>> map = new OpenLayers.Map( 'map' );
>> layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
>> "/tilecache/tilecache.py", {layers: 'topp'} );
>> map.addLayer(layer);
>>
>> map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
>> map.addControl(new OpenLayers.Control.MousePosition());
>>
>> map.addControl( new OpenLayers.Control.LayerSwitcher() );
>> }
>>
>> the result just show pink images, I dont why this happened. I was try to
>> setup more parameters. but I did not successed.
>> Is there anybody have idea about this situations? Thanks in advance
>>
>> All the best
>>
>> Xiaoyu
>> PS. I have send the same mail to tilecache mailinglist
>> --
>> Xiaoyu Guan (Sam)
>> Geo-information Science
>> Wageningen UR
>>
>>
>> !DSPAM:4007,488831c6186882458217002!
>>
>>
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>
>
> --
> Justin Deoliveira
> The Open Planning Project
> jdeolive at openplans.org
>
--
Xiaoyu Guan (Sam)
Geo-information Science
Wageningen UR
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