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Introduction
The NRT Spatial Data Format extends the NRT Data Format with a geometry column. It is used to create the possibilty to describe both, simple and complex geometries for visualisation products.
o2a.GeoCSV Format version 1
Format version 1 is not yet proofed. It is basically a GeoCSV using the WKT notation.
o2a.GeoCSV Example
datetime vessel:polarstern:mins:latitude [deg] vessel:polarstern:mins:longitude [deg] vessel:polarstern:tsk1:salinity [psu] vessel:polarstern:geometry [point]2019-02-28 15:50:00.000 34.03449 -14.17956 34.1234 POINT(34.03449 -14.17956)2019-02-28 15:50:01.000 34.03449 -14.17956 34.1345 POINT(34.03449 -14.17956)2019-02-28 15:50:02.000 34.03449 -14.17956 34.1456 POINT(34.03449 -14.17956)
Format
For complete description see 'Format' in NRT Data Format Version 2.
...
The 'unit' in square brackets '[ ]' is used for describing the geometry type. If empty 'point' is the default. If no 'datetime' the row will be deleted.
datetime type:dev:longitude [deg] type:dev:latitude [deg] type:dev:parameter1 [°C] type:dev:geometry [point]
datetime type:dev:parameter1 [°C] type:dev:geometry [line]
datetime type:dev:parameter1 [°C] type:dev:geometry [polygon]
In the context of O2A several publicly known data formats (GeoCSV, GeoTIFF, netCDF) are used but with additional requirements. To avoid confusion the resulting specifications should be referred to with an "O2A" prefix (e.g. "O2A GeoCSV") or by their file extensions (e.g. ".sdi.tab") as shown in this table.
| source format name | source format extensions | internal format extension | internal format names |
|---|---|---|---|
| GeoCSV | .csv, .tsv, .tab | .sdi.tab | O2A GeoCSV, internal GeoCSV |
| GeoTIFF | .tif, .tiff | .sdi.tif | O2A GeoTIFF, internal GeoTIFF |
| netCDF | .nc | .sdi.nc | O2A netCDF, internal netCDF |
These O2A specifications might look similar but are not to be confused with the NRT data format!
O2A Spatial Data Specifications:
| Children Display | ||
|---|---|---|
|
Tasks
What is with DOI based data?
o2a.GeoTiff Format version 1
Format version 1 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
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
SENSOR_URN=satellite:gcomw1:amsr2:l2:sic
DOI=PANGAEA.123456
PARAMETER_UNIT=%
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
ToDo
Tasks
The metadata tags must be tested in the processing workflow.a
awi.NetCDF Format version 1
Format version 1 is not yet proofed.
o2a.NetCDF Example
ToDo
Overview
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