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Introduction

The o2a.GeoTiff Format is a specification of the metadata tags nomenclature inside a GeoTiff used in the o2a dataflow. It extends the GeoTiff Format with defined metadata tags which are needed for the o2a dataflow.

o2a.GeoTiff Format version 1

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.

o2a.GeoTiff Example

Driver: GTiff/GeoTIFF
Files: ../Downloads/SeaIceRgb.tiff
Size is 1170, 385
Coordinate 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.123456
Image Structure Metadata:
    INTERLEAVE=PIXEL
Corner 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=Red
Band 2 Block=1170x2 Type=Byte, ColorInterp=Green
Band 3 Block=1170x2 Type=Byte, ColorInterp=Blue

Format

GeoTiff with well formed WKT description of the coordinate system and additional defeined metadata tags holding dateset specific informations.

Coordinate System

The Coordinate System (SRS,CRS) must be in written in the WKT format and must be valid against it. If not, it won't be accepted.

e.g. WKT of EPSG:4326: https://epsg.io/4326.wkt

PARAMETER_URN

The sensor or parameter urn of the dataset as defined in sensor.awi.de. It will be used for decisions in the o2a dataflow.

e.g. 'satelite:gcomw1:amsr2:l2:sic'

PARAMETER_UNIT

The unit of the given parameter

e.g. '%'

DOI

If the dataset is coming from PANGAEA, the DOI is used for identification.

e.g. 'PANGAEA.123456'

Tasks

The metadata tags must be tested in the processing workflow.


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