[Chameleon] GeoToPixel Function

[Paul Dymecki]

Hi Ken,
    Actually i'm creating a new widget.    I have a select list of lat/long
values i'm trying to zoom into after a user selection. So i would have to
convert the lat/lon values into something the zoomtopoint function can use.
ie pixel values.  So far no luck... as all the chameleon widgets i've seen
get their values from the a point click...
Paul
----- Original Message ----- 
From: "Ken Sanderson" <ken at rockies.ca>
To: "Paul Dymecki" <pdymecki at sympatico.ca>
Cc: <Chameleon at lists.maptools.org>
Sent: Thursday, April 14, 2005 10:39 AM
Subject: Re: [Chameleon] GeoToPixel Function


> By mapObject's zoomtopoint do you mean mapscript's zoompoint function?
> If so it takes its coordinates in pixels I believe.
>
> Are you creating a widget or where are you trying to access the coords?
> Have you tried grabbing the X and Y values from the form hidden
> variables MAP_CURSOR_POS_X and MAP_CURSOR_POS_Y, these values would be
> in pixels?
>
> Ken
>
>
> Paul Dymecki wrote:
> > Hi Paul,
> >     The Geo2Pix function seems pretty widely used throughout Chameleon,
> > though i'm having a bit of a time getting it to give me the a pixel
position
> > i can pass to a mapObject's zoomToPoint function.  Would i have to
> > re-project a geo value before passing it to Geo2Pix?
> > thx,
> > Paul
> >
> >
> > ----- Original Message ----- 
> > From: "Paul Spencer" <pspencer at dmsolutions.ca>
> > To: "Paul Dymecki" <pdymecki at sympatico.ca>
> > Cc: <Chameleon at lists.maptools.org>
> > Sent: Thursday, April 07, 2005 8:03 PM
> > Subject: Re: [Chameleon] GeoToPixel Function
> >
> >
> >
> >>Paul,
> >>
> >>if you are looking for something that is php-accessible, I don't think
> >>it exists so you'll need a php function for that.  Check the functions
> >>in geomath.php in chameleon, there is both Geo2Pix and Pix2Geo
> >>
> >>Cheers
> >>
> >>Paul
> >>
> >>Paul Dymecki wrote:
> >>
> >>>I was wondering if anyone knows of a mapscript function that converts a
> >>>geoCoded point to a pixel point?
> >>>thx,
> >>>Paul
> >>>
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