User:Markf129/Earth sciences data format interoperability: Difference between revisions

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===Georeferencing===

[[georeference | Georeferencing]] is establishing the relationship between raster or vector images, coordinates, and also when determining the spatial ___location of other geographical features. When translating between different data formats, it is often required to establish a common coordinate system reference. In some cases, additional reference information, such as a [[world file]], may be needed in order to do the translation. There are various GIS tools available that can transform image data to some geographic control framework, like [[ArcGIS|ArcMap]], PCI Geomatica, or [[ERDAS Imagine]].

* NetCDF

** No standard for storing georeferencing, some options to use for translating include:

* HDF4

*** Metadata tag 'grid_mapping'

* HDF5

*** Latitude, Longitude grid array

* HDF-EOS2

*** Spatial_ref and Geo transform array

* HDF-EOS5

* HDF-EOS2

** No standard for storing georeferencing, subdataset_type may contain swath data.

* GeoTIFF

** Georeferencing may be contained within file, otherwise if available an ESRI world file with MapInfo may be used.

* GRIB

** Grid coordinates defined in description section.

* GRIB2

* BUFR

** Coordinates defined in element descriptor section.

===File Formats===