The O2A GeoTIFF is a specification of the metadata tags nomenclature inside a GeoTIFF used in the O2A dataflow. It extends the public GeoTIFF format with defined metadata tags which are used in the O2A dataflow.
The O2A GeoTIFF specification version 1.1 is in progress and not yet fully proofed. It will replace the the O2A GeoTIFF specification version 1.
GeoTIFF with WKT representation of the coordinate reference system (it needs to be a CRS existing in the EPSG library) and additional metadata tags holding dataset-specific information.
A O2A GeoTIFF needs to contain all the following metadata tags. If any values are unkown, they should be left empty.
Metadata | Description, Examples | Value |
---|---|---|
Coordinate System | The Coordinate System (SRS,CRS) must be written in the WKT format and must be valid against the EPSG code representation. If not, it won't be accepted. e.g. WKT of EPSG:4326: https://epsg.io/4326.wkt | mandatory |
PARAMETER_NAME | (Natural language) name of measured or calculated parameter. e.g.: sic, multibeam | can be empty |
PARAMETER_URN | The parameter urn of the dataset as defined in sensor.awi.de or build from a pangaea DOI. It will be used for decisions in the o2a dataflow. e.g.: satellite:gcomw1:amsr2:l2:sic | |
PARAMETER_UNIT | The unit of the given parameter e.g. % | can be empty |
DATE_TIME or DATE_TIME_START DATE_TIME_END | Date/Time of the data, in the ISO 8601 format, e.g. YYYY-MM-DDThh:mm:ss. Either one timestamp (DATE_TIME) or two timestamps for time series (DATE_TIME_START, DATE_TIME_END). | mandatory |
LICENSE | License of the dataset. e.g. MIT, CC BY-NC 3.0 | can be empty |
Metadata like in the following examples could be retrieved by using the gdalinfo
command.
e.g.: gdalinfo ./path/to/file.sdi.tif
Driver: GTiff/GeoTIFF
Files: ../platforms/satellite/gcomw1/amsr2/l2/sic/data/2019/05/21/asi-AMSR2-n3125-20190521_EPSG4326.tif
Size is 4268, 4268
Coordinate System is: PROJCS["WGS 84 / Arctic Polar Stereographic",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4326"]],
PROJECTION["Polar_Stereographic"],
PARAMETER["latitude_of_origin",71],
PARAMETER["central_meridian",0],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","3995"]]
Origin = (-6527893.000000000000000,6882500.000000000000000)
Pixel Size = (3125.000000000000000,-3125.000000000000000)
Metadata:
AREA_OR_POINT=Area
grid_information=longitude-latitude grid for these data to be found at: https://seaice.uni-bremen.de/data/grid_coordinates/n3125/
long_name=ASI Ice Concentration, Version: 5.4, 20190521, res: 3.12500, AMSR2, Region: Arctic3125
valid_range=0, 100
PARAMETER_NAME=sic PARAMETER_URN=satellite:gcomw1:amsr2:l2:sic
PARAMETER_UNIT=%
LICENSE=
DATE_TIME=2019-05-21T00:00:00
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left (-6527893.000, 6882500.000) (136d30'52.93"W, 15d 7'10.61"N)
Lower Left (-6527893.000,-6455000.000) ( 45d19'18.07"W, 16d55'59.58"N)
Upper Right ( 6809607.000, 6882500.000) (135d18'18.09"E, 13d58'41.21"N)
Lower Right ( 6809607.000,-6455000.000) ( 46d31'52.83"E, 15d43'36.08"N)
Center ( 140857.000, 213750.000) (146d36'57.28"E, 87d38'39.46"N)
Band 1 Block=512x512 Type=Float32, ColorInterp=Gray
Min=0.000 Max=100.000
Minimum=0.000, Maximum=100.000, Mean=89.065, StdDev=23.340
NoData Value=0
Overviews: 2134x2134, 1067x1067, 534x534, 267x267, 134x134, 67x67
Metadata: STATISTICS_MAXIMUM=100
STATISTICS_MEAN=89.065134675115
STATISTICS_MINIMUM=0.0002532234066166
STATISTICS_STDDEV=23.340079762818
Driver: GTiff/GeoTIFF
Files: ../pangaea/893351/M132_bathy_data-products/M132_soundings_WGS84/M132_soundings_EPSG4326_2016-11-15.tif
Size is 4268, 4268
Coordinate System is: PROJCS["WGS 84 / Arctic Polar Stereographic",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4326"]],
PROJECTION["Polar_Stereographic"],
PARAMETER["latitude_of_origin",71],
PARAMETER["central_meridian",0],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","3995"]]
Origin = (-6527893.000000000000000,6882500.000000000000000)
Pixel Size = (3125.000000000000000,-3125.000000000000000)
Metadata:
AREA_OR_POINT=Area
PARAMETER_NAME=multibeam
PARAMETER_URN=pangaea:893351:M132_bathy_data-products:M132_soundings_WGS84:multibeam PARAMETER_UNIT=
LICENSE=Creative Commons Attribution-NonCommercial 3.0 Unported (CC-BY-NC-3.0)
DATE_TIME_START=2016-11-15T00:00:00
DATE_TIME_END=2016-12-11T00:00:00Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left (-6527893.000, 6882500.000) (136d30'52.93"W, 15d 7'10.61"N)
Lower Left (-6527893.000,-6455000.000) ( 45d19'18.07"W, 16d55'59.58"N)
Upper Right ( 6809607.000, 6882500.000) (135d18'18.09"E, 13d58'41.21"N)
Lower Right ( 6809607.000,-6455000.000) ( 46d31'52.83"E, 15d43'36.08"N)
Center ( 140857.000, 213750.000) (146d36'57.28"E, 87d38'39.46"N)
Band 1 Block=512x512 Type=Float32, ColorInterp=Gray
Min=0.000 Max=100.000
Minimum=0.000, Maximum=100.000, Mean=89.065, StdDev=23.340
NoData Value=0
Overviews: 2134x2134, 1067x1067, 534x534, 267x267, 134x134, 67x67
Metadata: STATISTICS_MAXIMUM=100
STATISTICS_MEAN=89.065134675115
STATISTICS_MINIMUM=0.0002532234066166
STATISTICS_STDDEV=23.340079762818
Definition for Format version 1 is in progress and is not yet proofed.
An GeoTiff with defined metadata tags. The advantage is to store the SensorURN and/or DOI and/or additional metadata tags in the file.
GeoTiff with well formed WKT description of the coordinate system and additional defined metadata tags holding dataset-specific information. Attribute names (orange) are case sensitive.
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Driver: GTiff/GeoTIFFFiles: ../Downloads/SeaIceRgb.tiffSize is 1170, 385Coordinate System is:GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]]Origin = (55.375000000188301,87.291666666664497)Pixel Size = (0.041666666666700,-0.041666666666700)Metadata: AREA_OR_POINT=Area PARAMETER_URN=satellite:gcomw1:amsr2:l2:sic PARAMETER_UNIT=% DOI=PANGAEA.123456Image Structure Metadata: INTERLEAVE=PIXELCorner Coordinates: Upper Left ( 55.3750000, 87.2916667) ( 55d22'30.00"E, 87d17'30.00"N) Lower Left ( 55.3750000, 71.2500000) ( 55d22'30.00"E, 71d15' 0.00"N) Upper Right ( 104.1250000, 87.2916667) (104d 7'30.00"E, 87d17'30.00"N) Lower Right ( 104.1250000, 71.2500000) (104d 7'30.00"E, 71d15' 0.00"N)Center ( 79.7500000, 79.2708333) ( 79d45' 0.00"E, 79d16'15.00"N)Band 1 Block=1170x2 Type=Byte, ColorInterp=RedBand 2 Block=1170x2 Type=Byte, ColorInterp=GreenBand 3 Block=1170x2 Type=Byte, ColorInterp=Blue