Ian,

That’s correct, it’s always XY for EPSG:27700, which is why I was trying to set 
the value to ‘false’.


I’ve just tried taking out the CRS line, but that doesn’t make any difference 
either. You’re correct that it’s not needed though as OL does appear to add it 
in for me, but I’m still getting the yx undefined error.






-- 
Dylan Parry

Blue Fox Technology Ltd
Tel: 01492 532100
Web: http://www.bluefoxtech.co.uk

Registered in England and Wales, Company No. 0508226.
Registered office: Windsor House, 26 Mostyn Avenue, Craig-Y-Don,
Llandudno, Conwy LL30 1YY





From: Ian Turton
Sent: ‎Friday‎, ‎18‎ ‎October‎ ‎2013 ‎15‎:‎29
To: [email protected]
Cc: Dylan Parry, [email protected]




I don't think that page applies to EPSG:27700 which is always XY (no matter 
which WMS version). 



Dylan, 

Have you tried taking the CRS: line out of your code? OpenLayers should fill 
that in for you from the map object.




Ian




On 18 October 2013 15:23, Jerome A. Wendell <[email protected]> wrote:




Dylan,

 

Have you looked at the following page in the documentation:

 

http://docs.geoserver.org/stable/en/user/services/wms/basics.html#differences-between-wms-versions

 

Jerome Wendell

 

 



From: Dylan Parry [mailto:[email protected]] 
Sent: Friday, October 18, 2013 10:12 AM
To: [email protected]; [email protected]
Subject: Re: [OpenLayers-Users] Cannot read property 'yx' of undefined



 



Hi,


 


That’s similar to what I tried before, ie.


 


yx: { ‘EPSG:27700’: false }


 


Strangely, the error goes away when I set the above to ‘true’ but then of 
course the coordinates are all wrong so the tiles won’t load. I can’t 
understand why setting it to false would bring up an error when false is still 
a valid value?



 


-- 
Dylan Parry

Blue Fox Technology Ltd
Tel: 01492 532100
Web: http://www.bluefoxtech.co.uk

Registered in England and Wales, Company No. 0508226.
Registered office: Windsor House, 26 Mostyn Avenue, Craig-Y-Don,
Llandudno, Conwy LL30 1YY


 



From: Jerome A. Wendell
Sent: ‎Friday‎, ‎18‎ ‎October‎ ‎2013 ‎13‎:‎25
To: Dylan Parry, [email protected]


 


Dylan,

 

I have added the following to the same section of code that you referred to for 
some of my layers:

 

yx : {'EPSG:4326' : true}

 

See if adapting it to your projection makes any difference.

 

Jerome Wendell

 

 



From: [email protected] 
[mailto:[email protected]] On Behalf Of Dylan Parry
Sent: Friday, October 18, 2013 8:06 AM
To: [email protected]
Subject: [OpenLayers-Users] Cannot read property 'yx' of undefined

 



Hi,


 


I’m trying to use a WMS with the EPSG:27700 projection. The WMS uses version 
1.3.0, which is causing a few problems. I have got to a point where I cannot 
figure out what’s wrong.


 


I am currently getting the following error:


 


Cannot read property ‘yx’ of undefined


 


and having read up a little, it appears that it’s due to the WMS version 
wanting to know whether to reverse the coordinates or not for the bbox 
parameter, but as the projection is unknown to OpenLayers there’s no yx 
property to query.


 


My problem is that I have no idea where to add that property to.


 


Here’s the code I have so far:


 


<script src="~/Scripts/proj4js.js"></script>
<script>
    Proj4js.defs["EPSG:27700"] = "+proj=tmerc +lat_0=49 +lon_0=-2 
+k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m 
+no_defs";
</script>
<script src="/Scripts/openlayers/openlayers.js"></script>
<script>
    var map, opus;


 


    function init() {
        OpenLayers.ImgPath = "/Scripts/openlayers/img/";


 


        var options = {
            maxExtent: new OpenLayers.Bounds(0, 0, 700000, 1300000),
            restrictedExtent: new OpenLayers.Bounds(0, 0, 700000, 1300000),
            projection: new OpenLayers.Projection('EPSG:27700'),
            units: 'm',
            scales: [10000, 25000, 50000, 75000, 100000, 150000, 175000, 
200000],
            controls: [
                new OpenLayers.Control.Navigation({ 'zoomWheelEnabled': false 
}),
                new OpenLayers.Control.MousePosition(),
                new OpenLayers.Control.PanZoomBar(),
                new OpenLayers.Control.LayerSwitcher()
            ]
        };


 


        map = new OpenLayers.Map('map', options);


 


        opus = new OpenLayers.Layer.WMS(
            'OpenStreetMap via Opus',
            'http://server/wms',
            {
                layers: 'OpenStreetMap',
                version: '1.3.0',
                crs: 'EPSG:27700',
                format: 'image/png',
            },
            {
                isBaseLayer: true,
                transitionEffect: 'resize'
            }
        );
        map.addLayer(opus);


 


        map.zoomToMaxExtent();
        map.zoomToScale(10000, true);
        map.setCenter(new OpenLayers.LonLat(195775, 223755));
    }
</script>


 


I also have an onload event that calls the init() function to draw the map on 
the page.


 


Any idea how to fix the error I’m getting? I’ve tried adding an xy property to 
the WMS bit of the code where ‘isBaseLayer’ is defined, but that didn’t seem to 
work.


 


Thanks,


 


-- 
Dylan Parry

Blue Fox Technology Ltd
Tel: 01492 532100
Web: http://www.bluefoxtech.co.uk

Registered in England and Wales, Company No. 0508226.
Registered office: Windsor House, 26 Mostyn Avenue, Craig-Y-Don,
Llandudno, Conwy LL30 1YY


 

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-- 
Ian Turton
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