[Mapserver-users] Recommendations for multiple query of invisible layers.

[Ed McNierney]

Jason -

I'm not sure I understand - are these georeferenced images?  I don't
care whether they're orthorectified, but if you don't have the
geographic extent of each image I don't see how you're going to do what
you originally wanted to do.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
ed at topozone.com
(978) 251-4242  

-----Original Message-----
From: Jason M. Nielsen [mailto:jnielsen at aero-graphics.com] 
Sent: Monday, February 09, 2004 10:12 AM
To: Ed McNierney
Cc: mapserver-users at lists.gis.umn.edu
Subject: RE: [Mapserver-users] Recommendations for multiple query of
invisible layers.

Quoting Ed McNierney <ed at topozone.com>:

> Jason -
> 
> You should already be using a TILEINDEX to index your orthophotos.
> Since your TILEINDEX is a shapefile with a polygon for each ortho, you

> can create a separate layer using a DATA statement with the same 
> shapefile.  Then you can do your spatial query on that layer; you 
> don't have to display it.
> 
> It sounds like you haven't yet discovered TILEINDEX or aren't using 
> it, however, and you should.
> 
> 	- Ed

Unfortunately these are not orthos. They are the aerial photos from
which the orthos were created. I suppose I could write a program to
generate the world file for these photos based off of scale and the
center point then use tileindex. In either case it sounds like the best
route is to use a shape file and if possible tileindex to create it. Ill
look into it further.

Thanks, Jason.

-------------------------------------------------
This mail sent through IMP: http://horde.org/imp/