[Mapserver-users] scale query

[woodbri at swoodbridge.com]

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
> >
> >
> >
> >
> > --------------------------------------------------------------------------
> -----------------------------------------------------------------------
> > Visit our websites www.wrcplc.co.uk, www.wrcnsf.com and www.nsf.org, as
> well as www.waterportfolio.com for collaborative research projects.
> > --------------------------------------------------------------------------
> -----------------------------------------------------------------------
> >
> > The Information in this e-mail is confidential and is intended solely for
> the addressee. Access to this e-mail by any other party is unauthorised. If
> you are not the intended recipient, any disclosure, copying, distribution or
> any action taken in reliance on information contained in this e-mail is
> prohibited and maybe unlawful. When addressed to WRc clients, any opinions
> or advice contained in this e-mail are subject to the terms and conditions
> expressed in the governing WRc client Agreement.
> > _______________________________________________
> > Mapserver-users mailing list
> > Mapserver-users at lists.gis.umn.edu
> > http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> >
> 
> _______________________________________________
> Mapserver-users mailing list
> Mapserver-users at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> -------------------------------------------------------------------------------------------------------------------------------------------------
> Visit our websites www.wrcplc.co.uk, www.wrcnsf.com and www.nsf.org, as well as www.waterportfolio.com for collaborative research projects.
> -------------------------------------------------------------------------------------------------------------------------------------------------
> 
> The Information in this e-mail is confidential and is intended solely for the addressee. Access to this e-mail by any other party is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on information contained in this e-mail 
is prohibited and maybe unlawful. When addressed to WRc clients, any opinions or advice contained in this e-mail are subject to the terms and conditions expressed in the governing WRc client Agreement.
> _______________________________________________
> Mapserver-users mailing list
> Mapserver-users at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
>