projection lon_0

[John Bolster]

Thanks very much. That handles it.

John

> -----Original Message-----
> From: jan hartmann [mailto:j.l.h.hartmann at uva.nl]
> Sent: Friday, September 24, 2004 12:03 PM
> To: John Bolster
> Cc: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] projection lon_0
>
>
> John Bolster wrote:
> > Hi all,
> >
> > Thanks to all of you who have helped me so far.
> >
> > I'm attempting to reproduce the projection used by the Census Bureau in
> > their Tiger map browser. It's a sinusoidal projection, but it
> appears to be
> > centered at the center of the rendered map each time rather
> than having one
> > origin. If I set my projection to sinu and manually set lon_0
> to the same as
> > the map center it looks right, but I want lon_0 to
> automatically follow the
> > map center.
> >
> > Is there any value I can pass in the url to set the lon_0 each
> time? I've
> > tried &map_projection_lon_0= and it doesn't work. Any ideas?
> >
> > Thanks,
> > John
> >
> Hi John,
>
> You have to specify the complete projection string as part of the URL:
>
> &map_projection=proj=sinu,lon_0=...
>
> HTH
>
> Jan
>