[OpenLayers-Users] Basic GeoServer OpenLayers map
Frank Broniewski
brfr at metrico.lu
Mon Apr 26 03:26:08 EDT 2010
Hello Steven,
if the text layer is at the same level as the HTML page try {location:
"txtfile.txt"} . I don't think your relative path gets well translated
Frank
Am 26.04.2010 09:00, schrieb Steven Venter:
> Hi Frank
>
> Thanks for your help. (this message was also sent to the mailing list -
> sorry about that.)
>
> I managed to solve the problem over the weekend. I used addLayers with a
> single layer supplied. I changed this to addLayer and my map displayed. I
> also added options to the map (maxResolution, maxExtent and projection).
>
> Lesson, don't follow tutorials blindly.
>
> But I still have a problem displaying a text layer.
>
> var txtLayer = new OpenLayers.Layer.Text("text", {location:
> "./txtfile.txt"});
> map.addLayer(txtLayer);
>
> When I view the Net tab in firebug FF is just sitting there trying to load
> the file.
> firebug net output: GET http://localhost/test/txtfile.txt
>
> My txtfile.txt is tab separated.
>
> Any suggestions?
>
> Steven
>
> -----Original Message-----
> From: Frank Broniewski [mailto:brfr at metrico.lu]
> Sent: 26 April 2010 08:37 AM
> To: Steven Venter; users at openlayers.org
> Subject: Re: [OpenLayers-Users] Basic GeoServer OpenLayers map
>
> Please reply also to the OpenLayers list!
>
> If the WMS request works in your browser there should'nt be a problem
> with the geoserver setup. I suspect the problem in your OL
> configuration. Usually I define a maxetent and a resolutions/or scale
> array for the map and then do a setCenter() at the end of the config ...
>
> Please show us a minimal example. Without that it is impossible for us
> to locate your problem.
>
> Frank
>
> Am 24.04.2010 08:38, schrieb Steven Venter:
>> Hi Frank
>>
>> If I put
>>
> http://localhost:8080/geoserver/wms?service=WMS&version=1.1.0&request=GetMap
>>
> &layers=topp:states$styles=&bbox=-124.7314220000001,24.955967,-66.969849,49.
>> 371735&width=708&height=330&srs=EPSG:4326&format=image/png in to my
> browsers
>> adders bar I get a png generate image of most of the USA states.
>>
>> I also debugged my script to see what the request to the server looks
> like.
>> As far as I can tell it all seems right.
>>
>> Under the DEFAULT_PARAMS variable I have this:
>> Exceptions "application/vnd.ogc.se_inimage
>> Format "image/jpeg"
>> Request "GetMap"
>> Service "WMS"
>> Style " "
>> Version "1.1.1"
>>
>> Under the params section I get the same but for the following:
>> FORMAT "image/png" -- as i requested
>> LAYERS "[topp:states]"
>>
>> The url variable contain this:
>> http://localhost:8080/geoserver/wms
>>
>> But I still can’t get the image displayed. I get the navigation items the
>> css border displayed, and in firebug the bounds is null error.
>>
>> The layers that I use are standard geogerver layers that are
> pre-installed.
>> I’m using these until I can get the basics right.
>>
>> 1. Do you have to specify the bounds? From the OL examples it doesn’t seem
>> so.
>> 2. Could this be a server problem?
>> 3. What else could I check?
>> 4. Any other suggestions.
>>
>> Thanks for you help.
>> Steven
>>
>> -----Original Message-----
>> From: Frank Broniewski [mailto:brfr at metrico.lu]
>> Sent: 23 April 2010 02:37 PM
>> To: Steven Venter; users at openlayers.org
>> Subject: Re: [OpenLayers-Users] Basic GeoServer OpenLayers map
>>
>> Hello Steven,
>>
>> unfortunately I have no experience with geoserver, but request URLs from
>> Openlayers WMS are conform to the OGC standards and if geoserver is also
>> conform there should'nt be a problem. A OL generated request from my
>> application:
>>
>>
> http://www.gis-hosting.lu/ogc/service/osm?LAYERS=label&STYLES=,,,&FORMAT=ima
>>
> ge%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&EXCEPTIONS=application%2Fv
>>
> nd.ogc.se_inimage&SRS=EPSG%3A2169&BBOX=67416.666666,70311.458332975,88583.33
>> 3334,81688.541667025&WIDTH=1200&HEIGHT=645
>>
>> It is in the Net tab from firebug. Something like GET osm?LAYERS= ...
>>
>> If you suspect the problem with geoserver you could try the WMS requests
>> in your browser so you can be sure that they are working. If you think
>> its a OL configuration problem please show your layer config code so
>> that we can search there ...
>>
>>
>> A OL WMS Layer example:
>>
>> new OpenLayers.Layer.WMS(
>> 'WMS',
>> 'http://www.gis-hosting.lu/ogc/service/osm',
>> {
>> layers: ['base','traffic','place-label'],
>> styles: ['','','',''], format: 'image/png'
>> },
>> {
>> isBaseLayer: true,
>> singleTile: true
>> }
>> );
>>
>> Frank
>>
>>
>> Am 23.04.2010 14:11, schrieb Steven Venter:
>>> Hi Frank
>>>
>>> Thanks for replying.
>>>
>>> I used firebug to look at the requests being sent to the server. The css
>>> stuff and the navigation items are requested but no request to fetch the
>>> image from the server.
>>>
>>> I used geoserver functionality to display the image in a page. I then cut
>>> and pasted that in to the code. I read on a tutorial site
>>> (http://vasir.net/blog/openlayers/openlayers-tutorial-part2-layers/) that
>>> some of the info for the request will be generated by openlayer, this
> site
>>> deals with MapServer so I tried to adapt that to geoserver.
>>>
>>> I will try what you suggested, but I’m not sure which parts of the
> request
>>> are auto generated.
>>>
>>> Steven
>>>
>>> -----Original Message-----
>>> From: Frank Broniewski [mailto:brfr at metrico.lu]
>>> Sent: 23 April 2010 08:17 AM
>>> To: ZAMap
>>> Subject: Re: [OpenLayers-Users] Basic GeoServer OpenLayers map
>>>
>>> Hi,
>>>
>>> did you already try to put the requested URL from the OpenLayers request
>>> in the address field of your browser and examine the response? I use
>>> Firebug for that and this already helps me alot for debugging WMS
>> requests.
>>>
>>> Frank
>>>
>>> Am 22.04.2010 20:03, schrieb ZAMap:
>>>>
>>>> Hi all
>>>>
>>>> I'm trying to get a basic map displayed but keep getting bounds is null
>>>> error.
>>>>
>>>> None of the suggestions (allOverlays: true) that I found works, most
>>>> probably because of other issues with my code/setup.
>>>>
>>>> Code:
>>>>
>>>> function init() {
>>>> var map = new OpenLayers.Map('map');
>>>>
>>>> var layers = new OpenLayers.Layers.WMS(
>>>> "basic",
>>>> "http://localhost:8080/geoserver/wms",
>>>> {layers: 'topp:states'}
>>>>
>>>> map.addLayers(layers);
>>>> map.zoomToMaxExtent();
>>>> }
>>>>
>>>> My geoserver is working, I can request the map and other data from the
>>>> server. Any pointers to good tutorials are welcome.
>>>>
>>>> Setup:
>>>> Ubuntu 9.10
>>>> GeoServer 2.0.1
>>>> Openlayers 2.8
>>>>
>>>> I would appreciate any help.
>>>
>>>
>>
>>
>
>
--
Frank BRONIEWSKI
METRICO s.à r.l.
géomètres
technologies d'information géographique
rue des Romains 36
L-5433 NIEDERDONVEN
tél.: +352 26 74 94 - 28
fax.: +352 26 74 94 99
http://www.metrico.lu
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