AW: [mapserver-users] JGW+JPG -> TIFF

[Janosch.Skrobek at trier.de]

Hi,

thanks for your answer. I was able to implement one of the pictures into a new layer like you described. Two new problems turn up. 

1) The image quality is really bad, the picture gets all reddish and yellowish and seems to loose pixels. I use PNG as format for all my maps. All the other (polygon) look ok this way. I tried PNG24 but I'm loosing transparency there. Is there another recommendable image-format? or what can I do to improve the picture quality in mapserver?

2) I have 80 orthofotos. Since I don't want to add a layer for each one I created a tileindex with gdaltindex.exe ... the created dbf file contains one column called LOCATION and has all the name of my jpegs in it but when I use it in mapserver the screen stays white, no pictures show up. Anyone having ideas on this?

Thank you
Janosch 

-----Ursprüngliche Nachricht-----
Von: Carlo Pelliconi [mailto:c.pelliconi at sis-ter.it] 
Gesendet: Donnerstag, 10. April 2008 15:49
An: Skrobek, Janosch
Cc: mapserver-users at lists.osgeo.org
Betreff: Re: [mapserver-users] JGW+JPG -> TIFF

Hi.
If you create a layer in the mapfile, with DATA set to your-raster.jpg, 
it automatically reads .jgw (it must have the same name of the jpg file) 
and users its informations for georeferencing it. Specify also TYPE 
raster and if you want MIN/MAXSCALE.
If you prefer tiff file, you must convert jpg in tif by means of a 
graphic editor and then translate .jgw in .tfw. It could request not 
only renaming the file, but also modify some coefficients defined inside 
the .jgw file (open it with notepad, it is simple text).

Hope this helps.
Bye

Janosch.Skrobek at trier.de ha scritto:
> Hello,
>
> I have a set of orthophotos which are saved as JPG. Each picture has a
> corresponding JGW file. Can I somehow implement these into a mapserver
> layer? Or do I need to create georeferenced tiffs? If so, how can I
> combine the JGW and JPGs into a tiff?
>
>
> Thank you
> Janosch
>


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