Mapfile Extent

[thomas bonfort]

if you are using the gmap demo as you say, you can also see the extent
in the url as minx,miny,maxx and maxy. zoom in until you find a
comfortable view, and report these extent values in your mapfile

cheers,
tb

On 9/27/05, Frank Warmerdam <warmerdam at pobox.com> wrote:
> On 9/26/05, Oliver Ishmael <oliver_ishmael at hotmail.com> wrote:
> > Dear all,
> >
> > I'm still a bit of a noob to all this, but have the following problem:
> >
> > I am trying modify the Gmap demo to form a template i can work with.
> > Currently it views a .tif (USA) and i would like it to view a .tif (UK) with
> > additional associated layers.
> >
> > How do i work out the extents of my new layer (UK .tif)?
>
> Oliver,
>
> If you have a TIFF file there are various external-to-mapserver
> utilities you can use to get the extents.  I would suggest gdalinfo
> if you already have that or can easily get it (ie. s part of FWTools
> at http://fwtools.maptools.org/)
>
> > ..and ensure that i do not just see a dot at the centre of the screen which
> > requires me to multi-zoom before it is visible and informative?
> > (min manx-scale - how do i know??)
>
> If you set the default extents to the extents for your image you
> should be fine.  I usually start by setting MINSCALE to 0 and
> MAXSCALE to 10000000.  You can always assign more reasonable
> limits later once you have the basics working.
>
> Good luck,
> --
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>