[Mapserver-users] scale query

[David Fawcett]

There are a lot of good messages in the archive related to this (most of
them written by Ed.)

Check this one out:

http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0211/msg00186.html


http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0212/msg00191.html


This should get you started.  The archives are at: 
http://mapserver.gis.umn.edu/cgi-bin/wilma/mapserver-users

I searched the archives using a string of 'scale;Ed'  


David.

David J. Fawcett
MN Office of Environmental Assistance

>>> <woodbri at swoodbridge.com> 2/25/2004 9:19:48 AM >>>
Daniel,

It means your map scale is 1:5249704.8 based on some assumptions that 
an output pixel is like 72 (I think, maybe 96) dots per inch. Also 
this is the value that you would specify in the MINSCALE/MAXSCALE 
values in the mapfile.

This get asked fairly often so a search on the archives or maybe the 
wiki or doc will explain it more. 

-Steve W.

On 25 Feb 2004 at 14:25, Mills, Daniel wrote:

> if i change map units to DD i get 5249704.8  What does this figure
actually
> mean??
> 
> Daniel
> 
> -----Original Message-----
> From: FX Gamoy [mailto:fx.gamoy at mapxplore.com] 
> Sent: Wednesday, 25 February 2004 14:14
> To: mapserver-users at lists.gis.umn.edu 
> Subject: Re: [Mapserver-users] scale query
> 
> 
> hello
> if u are using latlong, try setting units to DD
> fx
> 
> ----- Original Message -----
> From: "Mills, Daniel" <Mills_D at wrcplc.co.uk>
> To: <mapserver-users at lists.gis.umn.edu>
> Sent: Wednesday, February 25, 2004 2:46 PM
> Subject: [Mapserver-users] scale query
> 
> 
> > Hi,
> >
> > I am querying map->sclae and getting back funny results.  Can
anybody
> help.
> >
> > i am using mapserver 4.2 with mapscript. When i zoom to the extents
of the
> > uk (-7.000 49.000 3.000 59.000) i get a scale of 47.24412.  I have
set my
> > map projection to lat/long, the data is held in Oracle Spatial
SRID=null.
> > map units have been set to METERS.  I have set all of my layers to
> lat/long
> > and units m.
> >
> > Does anybody have any ideas as to why this is the case?
> > Thanks
> > Daniel
> >
> >
> >
> >
> >
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