Hi,
I took cogger for a first test drive and I'm confused. I'm relatively new to
the world of Cloud Optimized Geotiffs, so I don't know if my confusion is about
the COG format itself or cogger:
I fed a jpeg-in-geotiff file with external overviews (tif.ovr) and mask
(tif.msk) to cogger. The output contains neither overviews or mask. Is that the
expected result?
It's my understanding not having overviews is the rare case, and do that only
if you know what you're doing (I don't!). Is there something I should be doing
to keep or regenerate the overviews?
Gdalinfo reports for in and output attached. Gdal's validate-cog python script
says the output is a valid cog, also attached.
Best,
Matt Wilkie
Geomatics Developer & Administrator
Environment | Technology, Innovation and Mapping
T 867-667-8133 | Yukon.ca<http://yukon.ca/>
Hours: 08:30-16:30, Mon-Wed: Office, Thu: Remote, Fri: Away.
Driver: GTiff/GeoTIFF
Files: test.tif
Size is 126015, 68149
Coordinate System is:
PROJCRS["NAD_1983_Yukon_Albers",
BASEGEOGCRS["NAD83",
DATUM["North American Datum 1983",
ELLIPSOID["GRS 1980",6378137,298.257222101004,
LENGTHUNIT["metre",1]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4269]],
CONVERSION["Albers Equal Area",
METHOD["Albers Equal Area",
ID["EPSG",9822]],
PARAMETER["Latitude of false origin",59,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8821]],
PARAMETER["Longitude of false origin",-132.5,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8822]],
PARAMETER["Latitude of 1st standard parallel",61.6666666666667,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8823]],
PARAMETER["Latitude of 2nd standard parallel",68,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8824]],
PARAMETER["Easting at false origin",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8826]],
PARAMETER["Northing at false origin",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8827]]],
CS[Cartesian,2],
AXIS["easting",east,
ORDER[1],
LENGTHUNIT["metre",1]],
AXIS["northing",north,
ORDER[2],
LENGTHUNIT["metre",1]],
ID["EPSG",3578]]
Data axis to CRS axis mapping: 1,2
Origin = (293217.000000000000000,1126371.000000000000000)
Pixel Size = (1.500000000000000,-1.500000000000000)
Metadata:
AREA_OR_POINT=Area
DataType=Processed
Image Structure Metadata:
COMPRESSION=JPEG
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 293217.000, 1126371.000) (136d49'19.22"W, 64d33'30.27"N)
Lower Left ( 293217.000, 1024147.500) (136d40'52.72"W, 63d38'41.16"N)
Upper Right ( 482239.500, 1126371.000) (132d52'18.43"W, 64d37'15.93"N)
Lower Right ( 482239.500, 1024147.500) (132d51'34.73"W, 63d42'19.54"N)
Center ( 387728.250, 1075259.250) (134d48'36.81"W, 64d 8'43.57"N)
Band 1 Block=128x128 Type=Byte, ColorInterp=Red
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=50.198, StdDev=75.457
NoData Value=256
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=50.197691262641
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=1
STATISTICS_SKIPFACTORY=1
STATISTICS_STDDEV=75.456911360778
Band 2 Block=128x128 Type=Byte, ColorInterp=Green
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=50.863, StdDev=75.993
NoData Value=256
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=50.862667930779
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=1
STATISTICS_SKIPFACTORY=1
STATISTICS_STDDEV=75.993162525726
Band 3 Block=128x128 Type=Byte, ColorInterp=Blue
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=44.089, StdDev=71.226
NoData Value=256
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=44.08913515331
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=1
STATISTICS_SKIPFACTORY=1
STATISTICS_STDDEV=71.225888610331
Driver: GTiff/GeoTIFF
Files: SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif
SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif.ovr
SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif.msk.ovr
SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif.msk
SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif.aux.xml
Size is 126015, 68149
Coordinate System is:
PROJCRS["NAD_1983_Yukon_Albers",
BASEGEOGCRS["NAD83",
DATUM["North American Datum 1983",
ELLIPSOID["GRS 1980",6378137,298.257222101004,
LENGTHUNIT["metre",1]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4269]],
CONVERSION["Albers Equal Area",
METHOD["Albers Equal Area",
ID["EPSG",9822]],
PARAMETER["Latitude of false origin",59,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8821]],
PARAMETER["Longitude of false origin",-132.5,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8822]],
PARAMETER["Latitude of 1st standard parallel",61.6666666666667,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8823]],
PARAMETER["Latitude of 2nd standard parallel",68,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8824]],
PARAMETER["Easting at false origin",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8826]],
PARAMETER["Northing at false origin",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8827]]],
CS[Cartesian,2],
AXIS["easting",east,
ORDER[1],
LENGTHUNIT["metre",1]],
AXIS["northing",north,
ORDER[2],
LENGTHUNIT["metre",1]],
ID["EPSG",3578]]
Data axis to CRS axis mapping: 1,2
Origin = (293217.000000000000000,1126371.000000000000000)
Pixel Size = (1.500000000000000,-1.500000000000000)
Metadata:
AREA_OR_POINT=Area
DataType=Processed
Image Structure Metadata:
COMPRESSION=JPEG
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 293217.000, 1126371.000) (136d49'19.22"W, 64d33'30.27"N)
Lower Left ( 293217.000, 1024147.500) (136d40'52.72"W, 63d38'41.16"N)
Upper Right ( 482239.500, 1126371.000) (132d52'18.43"W, 64d37'15.93"N)
Lower Right ( 482239.500, 1024147.500) (132d51'34.73"W, 63d42'19.54"N)
Center ( 387728.250, 1075259.250) (134d48'36.81"W, 64d 8'43.57"N)
Band 1 Block=128x128 Type=Byte, ColorInterp=Red
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=50.614, StdDev=74.600
NoData Value=256
Overviews: 63008x34075, 31504x17038, 15752x8519, 7876x4260, 3938x2130,
1969x1065, 985x533, 493x267, 247x134
Mask Flags: PER_DATASET
Overviews of mask band: 63008x34075, 31504x17038, 15752x8519, 7876x4260,
3938x2130, 1969x1065, 985x533, 493x267, 247x134
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_COVARIANCES=5565.128437942932,5540.865735280094,5024.566743610575
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=50.613830309646
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=3
STATISTICS_SKIPFACTORY=3
STATISTICS_STDDEV=74.599788457763
Band 2 Block=128x128 Type=Byte, ColorInterp=Green
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=51.316, StdDev=74.979
NoData Value=256
Overviews: 63008x34075, 31504x17038, 15752x8519, 7876x4260, 3938x2130,
1969x1065, 985x533, 493x267, 247x134
Mask Flags: PER_DATASET
Overviews of mask band: 63008x34075, 31504x17038, 15752x8519, 7876x4260,
3938x2130, 1969x1065, 985x533, 493x267, 247x134
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_COVARIANCES=5540.865735280094,5621.831514064254,5110.691753124167
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=51.316138944418
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=3
STATISTICS_SKIPFACTORY=3
STATISTICS_STDDEV=74.978873784982
Band 3 Block=128x128 Type=Byte, ColorInterp=Blue
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=45.167, StdDev=69.648
NoData Value=256
Overviews: 63008x34075, 31504x17038, 15752x8519, 7876x4260, 3938x2130,
1969x1065, 985x533, 493x267, 247x134
Mask Flags: PER_DATASET
Overviews of mask band: 63008x34075, 31504x17038, 15752x8519, 7876x4260,
3938x2130, 1969x1065, 985x533, 493x267, 247x134
Metadata:
RepresentationType=ATHEMATIC
STATISTICS_COVARIANCES=5024.566743610575,5110.691753124167,4850.825968821137
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=45.166863168231
STATISTICS_MINIMUM=0
STATISTICS_SKIPFACTORX=3
STATISTICS_SKIPFACTORY=3
STATISTICS_STDDEV=69.647871244002
SPOT6_321_BeaverRiver_08Sep2018_NAD83_YAlbers.tif is NOT a valid cloud
optimized GeoTIFF.
The following errors were found:
- Overviews found in external .ovr file. They should be internal
- The offset of the main IFD should be 16. It is 3976461646 instead
- The offset of the IFD for overview of index 0 is 16, whereas it should be
greater than the one of the main image, which is at byte 3976461646
- The offset of the first block of overview of index 7 should be after the one
of the overview of index 8
- The offset of the first block of overview of index 6 should be after the one
of the overview of index 7
- The offset of the first block of overview of index 5 should be after the one
of the overview of index 6
- The offset of the first block of overview of index 4 should be after the one
of the overview of index 5
- The offset of the first block of overview of index 3 should be after the one
of the overview of index 4
- The offset of the first block of overview of index 2 should be after the one
of the overview of index 3
- The offset of the first block of overview of index 1 should be after the one
of the overview of index 2
- The offset of the first block of overview of index 0 should be after the one
of the overview of index 1
The following warnings were found:
- The file is greater than 512xH or Wx512, it is recommended to include
internal overviews
test.tif is a valid cloud optimized GeoTIFF
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