[mapserver-users] PHP mapscript recenter problem

[Alan Boudreault]

Donatas,

You'll have to convert the longitude/latitude to pixels. I'm not very familiar 
with those conversions since I don't play with that often. However,  I think 
the following example can help you to figure out how to do it:
http://lists.osgeo.org/pipermail/mapserver-users/2005-June/008214.html

Perhaps, someone else on the list could give you a better/smaller example.

regards,
Alan 
 
On January 25, 2010 02:51:41 am Donatas Malinauskas wrote:
> Hi Alan,
> 
> Thanks for yours reply! Yes now it's clear pixels are integers... It is
> too bad that this simply function mismatches to me.  Is there other
> recenter function which works with x,y in lonlat? I didn't see something
> like that in mapserver/mapscript documentation...
> 
> Good day,
> Donatas.
> 
> Alan Boudreault wrote:
> > Donatas,
> >
> > The x,y given to the zoomPoint function are in PIXEL, not lonlat. You
> > cannot specify a half pixel. That said, pixel are integers, not double.
> >
> > Alan
> >
> > On January 22, 2010 03:22:30 am Donatas Malinauskas wrote:
> >> HGood day,
> >>
> >> I have some problem. I want to recenter my map exactly to users given
> >> georeferenced coordinates. For that purpose I use php mapscript function
> >> - zoompoint(ZOOMFACTOR,$myXY, WIDTH, HEIGHT, EXTENT) with ZOOMFACTOR=1.
> >> But this function doesn't work correctly. ZoomPoint function centers map
> >> to rounded x,y position (then I have myX 235.5px and myY 330.42 it
> >> rounds to 235px, 330px) and moves map to incorect center coordinates.
> >> What should I do in this situation, please give me some advice, how
> >> recenter map with  best precision.
> >>
> >> Thanks,
> >> Donatas.
> >> _______________________________________________
> >> mapserver-users mailing list
> >> mapserver-users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> 

-- 
Alan Boudreault
Mapgears
http://www.mapgears.com