[mapserver-users] Map Orientation

[Rob Martinson]

Rotating the image won't work because pixels are square and that would
throw my extents way off in the final display if I had to make up the
extra whitespace from rectangular image corners across the sides. I
hadn't thought of reprojecting, but that's a possiblity. 

A few applications that I can think of off the top of my head. First is
GPS tracking applications where you may "follow" a vehicle. The vehicle
is always centered within the extent and always oriented to the top of
the map with the map rotating as direction changes. Additionally,
sometimes coverages are better displayed with a specific feature at map
top rather than true North. For example, a map of ski runs on the North
face of a mountain. Just doesn't seem right to ski from bottom to top :)

It's not a big issue, and I'm sure you have a million things on your
plate. Just an idea.

Thanks for listening!

Rob Martinson
Nichebox - http://www.nichebox.com
Development - http://dev.nichebox.com 

> -----Original Message-----
> From: Stephen Lime [mailto:steve.lime at dnr.state.mn.us] 
> Sent: Friday, July 20, 2001 11:41 PM
> To: mapserver-users at lists.gis.umn.edu; cathode at nichebox.com
> Subject: Re: [mapserver-users] Map Orientation
> 
> 
> Hasn't been considered at all, although you might be able to 
> accomplish it just using PROJ.4. That can't be efficient 
> though. Why not just rotate or mirror the resulting image? I 
> could be convinced, but this doesn't seem a frequently 
> requested option to warrant a new parameter...
> 
> Steve
> 
> Stephen Lime
> Internet Applications Analyst
> 
> Minnesota DNR
> 500 Lafayette Road
> St. Paul, MN 55155
> 651-297-2937
> 
> >>> "Rob Martinson" <cathode at nichebox.com> 07/20/01 03:32PM >>>
> I don't see this capability anywhere in Mapscript or Mapfile 
> definition thus far, but is it possible to change the 
> orientation of the map? Or has this been considered at all?
> 
> For example, I would like to be able (in Mapscript) to rotate 
> the map in degrees. 0 being the default with north/south on 
> the X axis. Negative values through -180 would rotate counter 
> clockwise on a center axis, positive values through 180 would 
> do the same clockwise. Possible?
> 
> By the way, TAB support is sweet! Works great. Would anyone 
> be interested in a little PHP/Mapscript to parse and load 
> MapInfo workspaces?
> 
> 
> Rob Martinson
> Nichebox - http://www.nichebox.com 
> Development - http://dev.nichebox.com 
> 
> 
>