[mapserver-users] Raster Display Performance

[Robert Sanson]

Hi Zsolt
 
Before you use gdaladdo, I would make sure that the internal structure on your TIFF files is tile based. You can use gdalinfo to check. If not, use gdal_translate to turn into a tile structure:
 
gdal_translate -of GTiff -co TILED=YES -co BLOCKXSIZE=64 -co BLOCKYSIZE=64 input.tif output.tif
 
After that use gdaladdo:
 
gdaladdo -r average abc.tif 2 4 8 16
 
You should repeat this for every TIF image you have.
 
Thirdly, create your index file using gdaltindex
 
Finally, use shptree to create a spatial index on your index Shape file:
 
shptree index.shp
 
regards,
 
Robert


>>> Medve Zsolt <medvezs84 at gmail.com> 8/03/2010 8:46 a.m. >>>
Hy all!

I would like to ask for a help. I have a dataset. 30 pieces of Tif file, 
aproximately 240 MB each.
I make a layer in the map file:

         LAYER
             NAME "something"
             STATUS ON
             TILEINDEX "sh.shp"
             TILEITEM "Location"
             TYPE RASTER

             METADATA
                 "DESCRIPTION"   "Something too"
                 "ows_title"     "dem"
             END
         END

I use this in the pmapper framework.(But its doing the same thing in 
ka-map either) But its apeaars very slowly and when i panning its reload 
all and its very slowly too.. i would like to tune up the performance 
somwhow.
I am looking the gdaladdo program, because mapserver documentation 
suggest it. But when i tried the given examples 
(http://www.gdal.org/gdaladdo.html) it wont work, or i dont know what to 
see, Its just do nothing i think..

Can anybody help me on this? Or any method to make a better performance? 
please!

thanks,
Zsolt



_______________________________________________
mapserver-users mailing list
mapserver-users at lists.osgeo.org 
http://lists.osgeo.org/mailman/listinfo/mapserver-users 

------------------------------------------------------------------
The contents of this email are confidential to AsureQuality. If you have received this communication in error please notify the sender immediately and delete the message and any attachments. The opinions expressed in this email are not necessarily those of AsureQuality. This message has been scanned for known viruses before delivery. AsureQuality supports the Unsolicited Electronic Messages Act 2007. If you do not wish to receive similar communications in future, please notify the sender of this message.
------------------------------------------------------------------


This message has been scanned for malware by SurfControl plc. www.surfcontrol.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapserver-users/attachments/20100308/b5e83df4/attachment.html