[OpenLayers-Users] General question and GML question

[Christopher Schmidt]

On Mon, Dec 08, 2008 at 10:05:35AM -0400, Ken Sanderson wrote:
> 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.

Does your application include proj4js, and definitions for the 2153
projection?

> 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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-- 
Christopher Schmidt
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