Hi,
I have a geotiff with mutliple overviews (see below gdalinfo output) and
I'm wondering if these are used? Looking at the MaskOverviewProvider code
in Geotools [1] I suspect not and only the first .ovr will be used.
Am I correct?
TIA, Mark
[1]
https://github.com/geotools/geotools/blob/master/modules/library/coverage/src/main/java/org/geotools/coverage/grid/io/imageio/MaskOverviewProvider.java#L118
Driver: GTiff/GeoTIFF
Files: ./Leiden_2017.tiff
./Leiden_2017.tiff.ovr
./Leiden_2017.tiff.ovr.ovr
./Leiden_2017.tiff.ovr.ovr.ovr
./Leiden_2017.tiff.ovr.ovr.ovr.ovr
Size is 175000, 200000
Coordinate System is:
PROJCS["Amersfoort / RD New",
GEOGCS["Amersfoort",
DATUM["Amersfoort",
SPHEROID["Bessel 1841",6377397.155,299.1528128000008,
AUTHORITY["EPSG","7004"]],
TOWGS84[565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725],
AUTHORITY["EPSG","6289"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic"],
PARAMETER["latitude_of_origin",52.15616055555555],
PARAMETER["central_meridian",5.38763888888889],
PARAMETER["scale_factor",0.9999079],
PARAMETER["false_easting",155000],
PARAMETER["false_northing",463000],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AUTHORITY["EPSG","28992"]]
Origin = (89500.000000000000000,467000.000000000000000)
Pixel Size = (0.040000000000000,-0.040000000000000)
Metadata:
AREA_OR_POINT=Area
COLORSPACE=RGB
COMPRESSION_RATE_TARGET=4
VERSION=2
Image Structure Metadata:
COMPRESSION=YCbCr JPEG
INTERLEAVE=PIXEL
SOURCE_COLOR_SPACE=YCbCr
Corner Coordinates:
Upper Left ( 89500.000, 467000.000) ( 4d25'46.80"E, 52d11'17.62"N)
Lower Left ( 89500.000, 459000.000) ( 4d25'52.35"E, 52d 6'58.77"N)
Upper Right ( 96500.000, 467000.000) ( 4d31'55.32"E, 52d11'20.45"N)
Lower Right ( 96500.000, 459000.000) ( 4d32' 0.28"E, 52d 7' 1.59"N)
Center ( 93000.000, 463000.000) ( 4d28'53.69"E, 52d 9' 9.65"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Description = Red
Overviews: 87500x100000, 43750x50000, 21875x25000, 10938x12500,
5469x6250, 2735x3125, 1368x1563, 684x782, 342x391
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Description = Green
Overviews: 87500x100000, 43750x50000, 21875x25000, 10938x12500,
5469x6250, 2735x3125, 1368x1563, 684x782, 342x391
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
Description = Blue
Overviews: 87500x100000, 43750x50000, 21875x25000, 10938x12500,
5469x6250, 2735x3125, 1368x1563, 684x782, 342x391
--
Disclaimer;
This message is just a reflection of what I thought at the time of sending.
The message may contain information that is not intended for you or that
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