Hi,
var bounds = new OpenLayers.Bounds(
-2880104.25, 2070327.125,
-1038944.658, 3262434.769
);
surely describe nothing in degree. A map in degree units goes from -180 W to
+180 E and -90 S to 90 N. A resolution of 7192 means, that one pixel
displays an area of 7192 x 7192 square units, what is much more than 360x180
for the whole world in degree. It seems, that the data, which are displayed
with GeoServer Preview, are not in degree and perhaps not in EPSG:4008 with
the parameter "+proj=longlat +ellps=clrk66 +no_defs". You should control the
extent of your data, which you make availible through GeoServer.
By default is your map in EPSG:4326 as you create the map without a
projection in the map options.
Also has it no effect, if you add projection: "EPSG:4008" as a param to your
WMS declaration. The WMS request get added SRS=EPSG:4326 as it is the map
projection.
I think the problem are the data, you want to display.
Arnd
_____
Von: IT Intern [mailto:[email protected]]
Gesendet: Mittwoch, 22. Dezember 2010 16:34
An: Arnd Wippermann
Cc: [email protected]
Betreff: Re: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying
Hello Arnd,
I tried out your suggestion but I am still at a lost here. I happened not
to get any error messages, but my layer didn't appear at all when I changed
these params. I tried with SRS 4326 and 900913 since my map has base layers
of 900913 and overlays of 4326. I also changed the bbox to -20037508.34,
-20037508.34, 20037508.34, 20037508.34 (the bbox of my current map). I also
notice that for this EPSG:4008 layer I see
-2369470.14441, 2720321.16942
Scale = 1 : 2854176M
as opposed to another layer of mine (EPSG:4326) on my map which shows
98.29099, 28.50735
Scale = 1 : 2M
In it's GeoServer preview. So at this point I'm assuming it has something
to do with the scale of my layer..
In the OpenLayers code of the GeoServer preview, they have:
var bounds = new OpenLayers.Bounds(
-2880104.25, 2070327.125,
-1038944.658, 3262434.769
);
var options = {
controls: [],
maxExtent: bounds,
maxResolution: 7192.02965625,
projection: "EPSG:4008",
units: 'degrees'
};
map = new OpenLayers.Map('map', options);
// setup tiled layer
tiled = new OpenLayers.Layer.WMS(
"sedac - Tiled", "http://localhost:8080/geoserver/wms";,
{
height: '331',
width: '512',
layers: 'cite:sedac',
styles: '',
srs: 'EPSG:4008',
format: format,
tiled: 'true',
tilesOrigin : map.maxExtent.left + ',' +
map.maxExtent.bottom
},
{
buffer: 0,
displayOutsideMaxExtent: true
}
);
// setup single tiled layer
untiled = new OpenLayers.Layer.WMS(
"sedac - Untiled",
"http://localhost:8080/geoserver/wms";,
{
height: '331',
width: '512',
layers: 'cite:sedac',
styles: '',
srs: 'EPSG:4008',
format: format
},
{singleTile: true, ratio: 1}
);
map.addLayers([untiled, tiled]);
I instead, set the params they have for their map in my layer because if I
set my map specific to this layer, other layers won't work as expected...
For the map I have:
var options = {
controls: [new OpenLayers.Control.Navigation()],
//Needed to use GeoExt controls such as the zoomslider
maxExtent: new OpenLayers.Bounds(-20037508.34,
-20037508.34, 20037508.34, 20037508.34),
units: 'm',
allOverlays: false //Do not display all layers on
load
}
var map = new OpenLayers.Map(options);
and for my EPSG:4008 layer I have:
var bounds = new OpenLayers.Bounds(-2880104.25, 2070327.125, -1038944.658,
3262434.769);
var borders = new OpenLayers.Layer.WMS(
"Borders", "http://localhost:8080/geoserver/wms";,
{id: 'borders', layers: 'cite:sedac', transparent: true, maxExtent: bounds,
maxResolution: 7192.02965625, projection: "EPSG:4008", units: 'degrees'},
{isBaseLayer: false, displayInLayerSwitcher: true, visibility: true,
displayOutsideMaxExtent: true}
);
Any further help would be greatly appreciated :)
Thank you,
elshae
On Tue, Dec 21, 2010 at 6:09 PM, Arnd Wippermann <[email protected]>
wrote:
Hi,
build the WMS request for your layer and test it in the browser. Change the
BBOX, SRS. Perhaps you get some error message.
http://localhost:8080/geoserver/wms?LAYERS=cite%3Asedac
<http://localhost:8080/geoserver/wms?LAYERS=cite%3Asedac&FORMAT=image%2Fpng&;
VERSION=1.1.1&TRANSPARENT=true&SERVICE=WMS&REQUEST=GetMap&STYLES=&EXCEPTIONS
=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A4326&BBOX=-153.599297,-105.3607
51,165.451558,97.517659&WIDTH=942&HEIGHT=599>
&FORMAT=image%2Fpng&VERSION=1.1.1&TRANSPARENT=true&SERVICE=WMS&REQUEST=GetMa
p&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A4326&BBOX=-
153.599297,-105.360751,165.451558,97.517659&WIDTH=942&HEIGHT=599
Arnd
_____
Von: IT Intern [mailto:[email protected]]
Gesendet: Dienstag, 21. Dezember 2010 23:19
An: Arnd Wippermann
Betreff: Re: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying
Hi Arnd, thanks for your reply! Unfortunately that has not solved the
problem for me :(
I set the bounds both on my map and layer individually and still that layer
does not display.
I've also tried with the bounds I obtained from GeoServer, again no luck :-/
var borders = new OpenLayers.Layer.WMS(
"Borders", "http://localhost:8080/geoserver/wms";, {id:
'borders', layers: 'cite:sedac', transparent: true, maxExtent: new
OpenLayers.Bounds(-2880104.25, 2070327.125, -1038944.658, 3262434.769),
projection: new OpenLayers.Projection('EPSG:4008'), units: 'm'},
{isBaseLayer: false, displayInLayerSwitcher: true, visibility: true,
displayOutsideMaxExtent: true}
);
I still don't see why it is not working ...
Many Thanks,
elshae
On Tue, Dec 21, 2010 at 2:28 PM, Arnd Wippermann <[email protected]>
wrote:
Hi,
I would think, that the maxExtent is the part to change.
Your map projection is EPSG:4326 by default, and EPSG:4008 is also a
projection in longlat.
With your maxExtent the visible response of the WMS are only a pixel.
Try a maxExtent of -180,-90,180,90. Perhaps it solves your problem.
Arnd
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von elshae
Gesendet: Dienstag, 21. Dezember 2010 15:50
An: [email protected]
Betreff: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying
Thank you so much for the kind support. I see that this is definitely going
in the right direction, but I am still not able to get it working.
In my body tag I have the scripts
<script src="./OpenLayers-2.10/OpenLayers.js"></script>
<script src="./proj4js/lib/proj4js-combined.js"></script> //I did also try
proj4js.js, but the docs said use this one?
Then I have these before my map and layer declaration, also in the body tag
Ext.onReady(function() {
Proj4js.defs["EPSG:4008"] = "+proj=longlat +ellps=clrk66
+no_defs";
Proj4js.defs["SR-ORG:6627"] = "+proj=merc +lon_0=0 +k=1 +x_0=0
+y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs";
Proj4js.defs["EPSG:4326"] = "+proj=longlat +ellps=WGS84
+datum=WGS84 +no_defs";
...
...
//Map properties
var options = {
controls: [new OpenLayers.Control.Navigation()],
//Needed to use GeoExt controls such as the zoomslider
maxExtent: new OpenLayers.Bounds(-20037508.34,
-20037508.34, 20037508.34, 20037508.34),
units: 'm',
allOverlays: false //Do not display all layers on load
}
var map = new OpenLayers.Map(options);
var borders = new OpenLayers.Layer.WMS(
"Borders", "http://localhost:8080/geoserver/wms";, {id:
'borders', layers: 'cite:sedac', transparent: true, projection: new
OpenLayers.Projection("EPSG:4008")}, {isBaseLayer: false,
displayInLayerSwitcher: true, visibility: true}
);
Still nothing shows up :(. Am I doing something wrong? I'm not seeing the
error...
Thank you very much for your time,
elshae
--
View this message in context:
http://osgeo-org.1803224.n2.nabble.com/EPSG-4008-Layer-Not-Displaying-tp5838
081p5855542.html
Sent from the OpenLayers Users mailing list archive at Nabble.com.
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