Hello all,
I have a grid on a 1m resolution with a tilesize of 8000x8000.
To speed up the rendering process I have created overviews with gdaladdo, the
result you can see in the gdalinfo below.
The default blocksize is 512x512.
My questing handles the combination of blocksize and overviews. The blocksize
is 512x512 and the lowest resolution of the overview generates a block of
63x63. Are the lower resolution overviews usefull? I suppose it is only usefull
to create overviews until 500x500 if I have a blocksize of 512x512. Am I right?
[root@-appl bin]# gdalinfo /dsg/data/2d008/01/01/box_524_5689_hist.tiff
Driver: GTiff/GeoTIFF
Files: /dsg/data/2008/01/01/box_524_5689_hist.tiff
Size is 8000, 8000
Coordinate System is:
PROJCS["ETRS89 / UTM zone 31N",
GEOGCS["ETRS89",
DATUM["European_Terrestrial_Reference_System_1989",
SPHEROID["GRS 1980",6378137,298.2572221010002,
AUTHORITY["EPSG","7019"]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY["EPSG","6258"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4258"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",3],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","25831"]]
Origin = (524000.000000000000000,5696999.000000000000000)
Pixel Size = (1.000000000000000,-1.000000000000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( 524000.000, 5696999.000) ( 3d20'42.66"E, 51d25'25.28"N)
Lower Left ( 524000.000, 5688999.000) ( 3d20'40.71"E, 51d21' 6.32"N)
Upper Right ( 532000.000, 5696999.000) ( 3d27'36.86"E, 51d25'23.86"N)
Lower Right ( 532000.000, 5688999.000) ( 3d27'34.27"E, 51d21' 4.90"N)
Center ( 528000.000, 5692999.000) ( 3d24' 8.62"E, 51d23'15.14"N)
Band 1 Block=512x512 Type=Int16, ColorInterp=Gray
NoData Value=10000
Overviews: 4000x4000, 2000x2000, 1000x1000, 500x500, 250x250, 125x125, 63x63
Indien u VITO Mol bezoekt, hou aub er dan rekening mee dat de hoofdingang
voortaan enkel bereikbaar is vanuit de richting Dessel-Retie, niet vanuit
richting Mol, zie vito.be/route.<http://www.vito.be/route>
If you plan to visit VITO at Mol, then please note that the main entrance can
only be reached coming from Dessel-Retie and no longer coming from Mol, see
vito.be/en/contact/locations.<http://www.vito.be/en/contact/locations>
VITO Disclaimer: http://www.vito.be/e-maildisclaimer
_______________________________________________
gdal-dev mailing list
[email protected]
https://lists.osgeo.org/mailman/listinfo/gdal-dev
