[mapguide-users] Generating tiles for google maps

[Traian Stanev]

I don't really remember what constants I tweaked (and don't have the code anymore). However, Mercator by definition is square if you take the full x extent and y up to about 85.05 degrees.

Traian

> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-
> bounces at lists.osgeo.org] On Behalf Of George McLean
> Sent: Wednesday, December 19, 2007 1:30 PM
> To: MapGuide Users Mail List
> Subject: Re: [mapguide-users] Generating tiles for google maps
>
> Was the customization to make a square projection that ran from 85
> degrees south to 85 degrees north?
>
> Thanks
>
> George
>
> Traian Stanev wrote:
> > Yes, you have to use Mercator. To make the tiles match perfectly
> across the whole world, you will need to use a custom Mercator rather
> than the default one in MapGuide (last time I did it, I had to hardcode
> the projection into MapGuide). I think that if you restrict yourself to
> a small region, you can get away with the Mercator that already exists
> in MapGuide and some tiny translation tweaks to make it all align
> perfectly.
> >
> >
> > Traian
> >
> >
> >
> >> -----Original Message-----
> >> From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-
> >> bounces at lists.osgeo.org] On Behalf Of George McLean
> >> Sent: Wednesday, December 19, 2007 11:26 AM
> >> To: MapGuide Users Mail List
> >> Subject: Re: [mapguide-users] Generating tiles for google maps
> >>
> >> I have been trying to get this working as well. My approach has been
> to
> >> use data between 85 degrees north and 85 degrees south in a Mercator
> >> projection since this is what I believe Google maps uses. I am still
> >> not
> >> sure if this is the right approach as I am still working on it.
> >>
> >> To get the tiles within your bounding box, I would create the box
> and
> >> then zoom to the corners. The tiles for that region will be created
> and
> >> this will help you figure out the rows and columns for each corner
> at
> >> each zoom level. Once you know the zoom levels and row/column
> >> boundaries
> >> you can specify these parameters in the call to the tiling engine.
> >>
> >> George McLean
> >>
> >> azpublic wrote:
> >>
> >>> Hi,
> >>>
> >>>
> >>>
> >>> I'm looking for a way to generate custom tiles for google maps or
> Ms
> >>> Live maps / Virtual earth using Mapguide OS.
> >>>
> >>>
> >>>
> >>> I've created my map using studio and I'm now thinking about using
> the
> >>> Automated tiling engine from WSD to generate the tiles.
> >>>
> >>>
> >>>
> >>> My main problem is about which scale to use to have my custom tiles
> >>> match with google maps tiles. What are the mapguide scales I need
> to
> >>> use for specific google maps zoom levels?
> >>>
> >>>
> >>>
> >>> Moreover I want to generate tiles only for a specific lat/lon
> >>>
> >> bounding
> >>
> >>> box. Is this possible using the Tiling engine?
> >>>
> >>>
> >>>
> >>> Any help appreciated !
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> No virus found in this outgoing message.
> >>> Checked by AVG Free Edition.
> >>> Version: 7.5.503 / Virus Database: 269.17.4 - Release Date:
> >>>
> >> 16.12.2007
> >>
> >>> 00:00
> >>>
> >>> -------------------------------------------------------------------
> --
> >>>
> >> ---
> >>
> >>> _______________________________________________
> >>> mapguide-users mailing list
> >>> mapguide-users at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
> >>>
> >>> -------------------------------------------------------------------
> --
> >>>
> >> ---
> >>
> >>> No virus found in this incoming message.
> >>> Checked by AVG Free Edition.
> >>> Version: 7.5.503 / Virus Database: 269.17.4/1188 - Release Date:
> >>>
> >> 12/17/2007 2:13 PM
> >>
> >> _______________________________________________
> >> mapguide-users mailing list
> >> mapguide-users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/mapguide-users
> >>
> > _______________________________________________
> > mapguide-users mailing list
> > mapguide-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapguide-users
> >
> >
> >
>
> _______________________________________________
> mapguide-users mailing list
> mapguide-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-users