[OpenLayers-Users] Pink broken images

Thu May 24 10:44:42 PDT 2012

Hi Smaran,

I see your problem, I really think it is all about the projection stuff, I didn't see you code anywhere but I can presume you're missing some transformation stuff, check this link: http://blog.sonxurxo.com/2011/04/28/tutorial-de-openlayers-ii-capas-de-google/, it was completely useful for me, although it is in spanish you will be able to understand the code and if needed, google translator is always your friend =)

I put things like WMS and WFS with the good Mapserver, I mean, using the MAP file, so I don't know how it works with Geoserver (you use that if I remember well) but I'm almost sure your problem is about projection.

Hope this helps,

From: smaran.harihar at gmail.com
Date: Thu, 24 May 2012 09:47:55 -0700
Subject: Re: [OpenLayers-Users] Pink broken images
To: gamejihou at hotmail.com; openlayers-users at lists.osgeo.org

Hi Gery,
Ok so here the issue is like this,
As u can see the Map is working fine when the overlay shapefile which is not a basemap (star) is overlaid onto OSM and GMaps. If you look at the footer the co-ordinates are all wrong. How do I get that right? Now the AllQuebecSpecies (star), in the Map is originally EPSG:4326 which I was successfully able to reproject to EPSG:900913 and it is working great.

When I try to add a raster bio11, which is basemap, it is originally EPSG:4326 and according to the document Gery provided, it says that Geoserver has a inbuilt feature to handle the spherical Mercator and so we do not need to re-project it. So I simply added the raster as a WMS along with OSM and GMaps, but as u can see in this OSM map image, there is a lot of shift. The OSM map image was taken in the same position as the raster bio11. Also the raster bio11 footer shows the right co-ordinates but when I switch to OSM map image, the co-ordinates go bad. Also when I add raster bio11 without the projection, the AllQuebecSpecies (star), which is not a basemap, also just not appear when I switch to GMaps or OSM.

I hope this explains better.
Thanks & Regards,Smaran Harihar

On Thu, May 24, 2012 at 3:45 AM, Gery . <gamejihou at hotmail.com> wrote:

Hi Smaran,

That's nice, uhmmm I've had I think the same problem before, but not sure about the issue itself, could you post your code to see what is going wrong? also some images to illustrate your problem.

Cheers,

From: smaran.harihar at gmail.com
Date: Wed, 23 May 2012 15:29:41 -0700

Subject: Re: [OpenLayers-Users] Pink broken images
To: gamejihou at hotmail.com; openlayers-users at lists.osgeo.org

Hi Gery,
Thanks for the reply, I was able to resolve some of the errors. Ok the openlayer docs said that Geoserver is compatible with EPSG:900913 so I removed any projections and it now overlays fine. But there is some shift between my WMS base layer and OSM and GMap.

Also the new problem that I am facing is that  the lat and long that is displayed in the control is fine if I display my WMS, but if I change the basemap to OSM or GMap again the lat long goes haywire. Also the other WMS with property 'isBaseLayer': false is overlaid on my WMS basemap but not on OSM and GMaps. (Which was happening earlier).

Any suggesstions?
Thanks & Regards,Smaran Harihar

On Wed, May 23, 2012 at 1:27 PM, Gery . <gamejihou at hotmail.com> wrote:

Hello,

I think this link may help you about 1 and 2: http://gis.stackexchange.com/questions/26030/sometimes-a-white-square-dialogue-appears-in-the-middle-of-the-screen-map-data

I think 3 is because of the projection, google maps only works with 900913, so you have to add a line, if I remember well, almost at the end of your <script> tag to do the conversion, or it is something about proj, not sure because Im writing from memory, take a look here anyway: http://docs.openlayers.org/library/spherical_mercator.html

Hope this helps, cheers :)

From: smaran.harihar at gmail.com
Date: Wed, 23 May 2012 11:52:51 -0700
To: openlayers-users at lists.osgeo.org

Subject: [OpenLayers-Users] Pink broken images

Hi,
I am trying to create a base map of OSM, Google Roadmap and Google Hybrid and mash it up with my own base layers in Geoserver. So these are the problems I am facing,

1. I have two WMS that I am mashing up, on which is BaseLayer and another one is 'isBaseLayer' : false. The one with base layer is appearing as pink tiles with broken image and the 'isBaseLayer': false is rending perfectly over OSM, GoogleMaps. Any reason y? I have changed the projections using the following code,

var geographic = new OpenLayers.Projection("EPSG:4326");			var mercator = new OpenLayers.Projection("EPSG:900913");
			var world = new OpenLayers.Bounds(-180, -60, 180, 90).transform(geographic, mercator);			//var center = new OpenLayers.LonLat(-104.98, 39.76).transform(geographic, mercator);

			var options = {				projection : mercator,				units : "m",

				maxExtent : world			};
			var map = new OpenLayers.Map("map-id", options);

2. Since I have added the Google Maps and I am using v3.2, there is this splash screen appears every time the map loads or if i pan it around. How can i remove that screen? I close it by clicking on the cross and then again pan or click on the map and there it is again.

3. When I had initially added my two baselayers, the map control which got the lat and lon was giving the right co-ordinates but when I added the OSM and GMaps, the co-ordinates are completely different. Why is that? Is it because of the spherical Mercator? How can I make it right?

-- 
Thanks & RegardsSmaran Harihar

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-- 
Thanks & RegardsSmaran Harihar

-- 
Thanks & RegardsSmaran Harihar

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