[Mapserver-users] have a dynamic map file?

[Antti.Roppola@brs.gov.au]

Hi Chen,

I built an image catalogue for our Landsat collection using the CGI version
of mapserver. Vaguely:

I wrote an AML to read through the collection and produce for each image:
	- a thumbnail (150 x 150 pixel) and overview (1200 x 1200 pixel) image
	- Metadata (date, WRS, etc.)
	- A shapefile showing the extent

I then had a pile of templates and Shape files in a map file, plus some forms so
that people could select imagery between certain dates. The map showed wire-frame
outlines of the image extents and the thumbnail showed up in queries and was linked
to a larger jpg overview.

If I was going to do it again, I'd probably put all the extents and metadata into
PostGIS and use GDAL to georeference the thumbnails themselves. And I'd use GDAL
(rather than ArcINFO) to render the thumbnails.

Cheers,

Antti

-----Original Message-----
From: Chen Fu [mailto:novalet@yahoo.com.cn]
Sent: Friday, 7 March 2003 7:27 PM
To: mapserver-users@lists.gis.umn.edu
Subject: RE: [Mapserver-users] have a dynamic map file?


Sorry, I didn't tell my story clearly enough.

I'm working in a Satellite Station of China. We
receive data of many remote sensing statellite like
LandSat, SPOT, radarsat. The total number of quick
view images will be enormous. and everyday we have
hundreds new quickview images uploaded to the web for
the people to browse. 

The user can pick out a perfect image from the images
overlaped on the same area according to the cloud
coverage or season. Sometimes the user would like to
have an image of a large area which compose of several
Landsat7 images. so candidate images should be listed
beside the mapsever's client and once the user click
on one of them, the new image is shown(or merged) with
the other images selected before.

My solution should be dynamic online. the image source
is updated everyday, so the static tiled layer
solution seems not feasible. 

Any other good idea? :)



--- Ed McNierney <ed@topozone.com> 的正文：> Look at
the TILEINDEX keyword, and read the Raster
> HOWTO documentation.  One MapServer layer can
> contain many images.  I have a single MapServer
> layer with over 50,000 images in it.
> 
> 	- Ed
> 
> Ed McNierney
> President and Chief Mapmaker
> TopoZone.com / Maps a la carte, Inc.
> 73 Princeton Street, Suite 305
> North Chelmsford, MA  01863
> Phone: (978) 251-4242  Fax: (978) 251-1396
> ed@topozone.com
> 
> 
> -----Original Message-----
> From: Chen Fu [mailto:novalet@yahoo.com.cn] 
> Sent: Thursday, March 06, 2003 5:50 AM
> To: mapserver-users@lists.gis.umn.edu
> Subject: [Mapserver-users] have a dynamic map file?
> 
> Hi! 
> 
> I am using mapserver as server to browse satellite
> image quickview (resampled image) . my question is
> how
> to have a dynamic map file.
> 
> In demos of mapserver, we only select some layers
> that
> are already described in map file, and [layers] tell
> cgi to show some and hide others.
> 
> Because there is thousands of images, and in
> mapserver
> one image must be a layer, i must dynamic generate a
> new map file to tell mapserver which tiff must be
> catched to render. But i dont know how to do it yet.
> Any guru can give me a hand?
> 
> Thank you :)
> 
> 
>
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