[OpenLayers-Users] General question and GML question

[Ken Sanderson]

Sorry for the confusion. This is the 'broken' version as I was hoping 
someone might see what I was doing wrong to make it so this wouldnt 
work. My working version does not have that 2153 reference.

Ken



Eric Lemoine wrote:
> Hi Ken
> 
> You're saying you reprojected the data to spherical mercator, but
> there still is a ref to an EPSG:2153 projection object in your GML
> layer's options. That doesn't look correct.
> 
> Cheers,
> 
> Eric
> 
> 2008/12/7, Ken Sanderson <ken at rockies.ca>:
>> Just thought I would post a quick update. I have been beating my head
>> against the problem for a few days and tried most everything I could
>> think of including the steps outlined below to reproject the vector
>> data. I tried KML as well and though it would display fine in Google
>> Earth, it wouldnt display at all in OpenLayers.
>>
>> Eventually I converted the data in ArcGIS to Web Mercator, then used
>> gvSIG to export the GML and that worked perfect. So clearly it was a
>> projection issue, but I am not sure why the reproject did not work as it
>> seems fairly straight forward to implement. Is there anything I am doing
>> wrong here:
>>
>> // create Google Mercator layers
>> var gphy = new OpenLayers.Layer.Google( "Google Physical", {type:
>> G_PHYSICAL_MAP,'sphericalMercator': true});
>> var gmap = new OpenLayers.Layer.Google( "Google Streets",
>> {'sphericalMercator': true});
>> var gsat = new OpenLayers.Layer.Google( "Google Sattelite", {type:
>> G_SATELLITE_MAP, 'sphericalMercator': true});
>> var ghyb = new OpenLayers.Layer.Google( "Google Hybrid", {type:
>> G_HYBRID_MAP, 'sphericalMercator': true});
>>
>> map.addLayers([gphy, gmap, gsat, ghyb]);
>>
>> var partners = new OpenLayers.Layer.GML("Partner Boundaries",
>> "data/member_gvsig.gml", {projection: new
>> OpenLayers.Projection("EPSG:2153")});
>>
>> map.addLayer(partners);
>>
>>
>> Chris I tried to send you my GML files on Friday, was having email
>> issues so not sure that you go them or not?
>>
>> Thanks for your help,
>>
>> Ken
>>
>>
>>
>>
>> Christopher Schmidt wrote:
>>> On Fri, Dec 05, 2008 at 11:42:30AM -0400, Ken Sanderson wrote:
>>>> Hi everyone, this is about my third time giving OpenLayers a try and
>>>> this time I thought I would bite the bullet and ask some questions
>>>> instead of just going back to my mapserver setup.
>>>>
>>>> First a general best approach question. What I want to do is use google
>>>> data and put a simple polygon boundary on top. That boundary is
>>>> currently in a shape file. My thinking was to convert the shp file to
>>>> gml and just add it as a layer. I have since read that this maybe
>>>> tricker then I thought as google data is in a mercator projection that
>>>> does not have an EPSG code.
>>> OpenLayers has a built in ability to convert between EPSG:4326 (lat/lon)
>>> and Google's Mercator projection: see
>>> http://docs.openlayers.org/spherical_mercator/#reprojecting-vector-data
>>> for more information on how to use it.
>>>
>>>> Second more specific to the use of GML layers. I converted my shp file
>>>> to GML using gvSIG and in another attempt shp2gml from spatial order. I
>>>> cannot get my GML file to be viewable. Thinking it might be a projection
>>>> issue I thought I would just display my GML file on its own, to avoid
>>>> any conflicting projections, but that hasnt worked either. Using the
>>>> gml-layer.html example I tried to work backwards and put my GML file in
>>>> there, no luck.
>>> Can you share the GML file you generated? It's possible this is a
>>> version problem, or some other parsing error: without seeing the GML
>>> file (or a sample file that fails) it's hard to know for sure.
>>>
>>> Regards,
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> 

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