[mapserver-users] combine many georeferenced tifs in one layer
Bart van den Eijnden (OSGIS)
bartvde at osgis.nl
Mon Mar 10 08:58:35 EDT 2008
You can do the following things to speed up performance:
* create a spatial index on your tileindex shapefile with shptree (also make
sure you reference your TILEINDEX in the MAP file without the .shp suffix)
* create overviews in the tiff files using gdaladdo
Best regards,
Bart
--
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl
--------- Oorspronkelijk bericht --------
Van: Janosch.Skrobek at trier.de
Naar: mapserver-users at lists.osgeo.org <mapserver-users at lists.osgeo.org>
Onderwerp: RE: [mapserver-users] combine many georeferenced tifs in one
layer
Datum: 10/03/08 10:51
> Thanks a lot Bart and you too Till!
>
> I had some troubles with the wildcards (*.tif) since the gdaltindex binary
from gdal.org doesn't seem to support them - although it says so in the
manual. I googled a bit and found fwtools which have gdaltindex implemented
as well and here the wildcards work.
>
> But just as I thought I get follow-up problems :)
> 1) gdaltindex puts out a warning when processing my tiffs:
> Warning 1:TIFFFetNormalTag:ASCII value for tag "copyright"
contains null byte in value; value incorrectly truncated during reading due
to implementation limitations
>
> But luckily that doesn't seem to influence the result. Still I would like
to know what it is trying to tell me and google doesn't know :)
>
> 2) when loading the layer it takes at least 20seconds for mapserver to
show it. I understand it is because of big amount of data? (50files, all in
all 40MB) Is there any way to speed this up?
>
> Thank you very much for your help!
>
> Janosch
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: Bart van den Eijnden (OSGIS) [mailto:bartvde at osgis.nl]
> Gesendet: Montag, 10. März 2008 11:49
> An: Skrobek, Janosch; mapserver-users at lists.osgeo.org
> Betreff: Re: [mapserver-users] combine many georeferenced tifs in one
layer
>
> You need to create a tileindex using gdaltindex, and then reference that
> tileindex in your layer.
>
> See the RASTER HOWTO for details, chapter 4:
>
> http://mapserver.gis.umn.edu/docs/howto/raster_data
>
> Best regards,
> Bart
>
> --
> Bart van den Eijnden
> OSGIS, Open Source GIS
> http://www.osgis.nl
>
>
> --------- Oorspronkelijk bericht --------
> Van: Janosch.Skrobek at trier.de
> Naar: mapserver-users at lists.osgeo.org
<mapserver-users at lists.osgeo.org>
> Onderwerp: [mapserver-users] combine many georeferenced tifs in one layer
> Datum: 10/03/08 08:45
>
> > Hello everyone!
> >
> > I'm just getting started with Mapserver and have worked my way
through
> > the tutorial made by Pericles S. Nacionales. Now I have started to
work
> > on my own mapserver application but am experiencing some problems.
> >
> > I have a shapefile of my hometown which I use as the background
layer.
> > Now I want to add Raster Data, I have 50 georeferenced tif tiles of
the
> > area. I could add them in an own layer each but I would rather like
all
> > these tiffs to be in one layer. Is there a way to tell mapserver to
use
> > all tiffs in a folder for a layer? If not, what would be the best way
to
> > combine these tiffs into one big image?
> >
> > I hope you can help me out :)
> >
> > Best Regards
> > Janosch
> >
> >
>
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