The UNEP Shelf Programme has software for converting between the various formats referred to below. Most of the conversion software has been developed internally and may lack certain functionality, but can be further developed as new needs arise.
|Data structure and flow
The figure shows the data structure and flow in the One Stop Data Shop. (Click to view high resolution)
The figure shows how the various filters may be connected to filters and applications. (Click to view high resolution)
The internal vector file format for Geocap (http://www.geocap.no) is 3D Polygonal Data VTK format, see http://www.vtk.org/pdf/file-formats.pdf
Text files with data ordered in fixed columns or separated with a delimiter (comma, semicolon, space or tabs). Comma Separated Value (CSV) files can include coordinates (XY) as well as depth/altitude values (Z), and is a very common and useful format for export/import.
MGD77/HYD93/ARO88 formats, see http://www.ngdc.noaa.gov/mgg/gdas/hg_mgd2000.Html
SeaDOG fixed column data format, see http://www.noc.soton.ac.uk/CHD/SeaDOG/
A popularArcGIS vector format suitable for import/export – see http://downloads.esri.com/support/whitepapers/other_/shapefile.pdf
Different variations of NASA’s Directory Interchange Format, adapted to the actual vector and metadata files in use, see http://gcmd.gsfc.nasa.gov/User/difguide/difman.html
Extensible Markup Language, see http://www.w3.org/XML/
HyperText Markup Language, see http://www.w3.org/MarkUp/
Seismic data formats (http://www.seg.org/publications/tech-stand/seg_y_rev1.doc) accepted by Geocap.
Miscellaneous formats for multibeam bathymetry data accepted by the MB-System SW package.
The internal grid/raster format for Geocap (http://www.geocap.no) is Structured Points VTK format, see http://www.vtk.org/pdf/file-formats.pdf
GRD98, see http://www.ngdc.noaa.gov/mgg/gdas/hg_mgd2000.Html
Raster formats accepted by the GMT SW package, including Etopo2 , NetCDF (http://www.unidata.ucar.edu/software/netcdf/) and others.
Internal filters :
Filter to translate Geodas formatted (MGD77, HYD93, ARO88) files into vtk, csv, dif or xml format. Accepts also other xyz csv files for input, as well as dif files conforming to the same format as generated by the filter itself.
Filter to translate vector VTK files into xyz csv format.
Filter to make cut-outs of and to translate global grid files into VTK format; operates on Etopo2 (http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html) and pasted together (via GMT) versions of Gebco (http://www.bodc.ac.uk/projects/international/gebco/), Gina (http://www.gina.alaska.edu/page.xml?group=data&page=griddata),
S2004 (ftp://falcon.grdl.noaa.gov/pub/walter/Gebco_SandS_blend.bi2), Srtm30+ (http://topex.ucsd.edu/WWW_html/srtm30_plus.html), as well as
GRDD98 formatted global grid files
Filter to concatenate several csv files into one, to reformat csv files, to manipulate with field contents and names, and to weed xy files
Filters to convert particular fixed column files (DXFMT, Gebco vector files) into csv xyz format
Filters to generate shapefiles and dbf-files from csv files; can also convert csv files into ArcGIS Generate format
Filters based on shapelib (http://shapelib.maptools.org/) to extract shapefile points and data on csv format
Filter to convert dif files into csv files modelling a relational database
Filter to convert a set of csv files modelling a relational database into dif
Filter to convert dif files into html or xml files
External filters and software packages:
A 2d/3d mapping and modelling program in 3d space, comprising dedicated software solutions for calculating the outer limit of the continental shelf, see http://www.geocap.no
Programs for manipulating a wide variety of data in standard and non-standard formats, see http://www.ngdc.noaa.gov/seg/tools/freeform/
The Generic Mapping Tools, see http://gmt.soest.hawaii.edu/
Software for the Processing and Display of Swath Sonar Data, see http://www.ldeo.columbia.edu/res/pi/MB-System/
Integrated collection of GIS software products from ESRI, see http://www.esri.com/software/arcgis/