Article (Scientific journals)
A web interface for griding arbitrarily distributed in situ data based on Data-Interpolating Variational Analysis (DIVA)
Barth, Alexander; Alvera Azcarate, Aïda; Troupin, Charles et al.
2010In Advances in Geosciences, 28 (28), p. 29-37
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Keywords :
variational analysis; vizualizaion; web application
Abstract :
[en] Spatial interpolation of observations on a regular grid is a common task in many oceanographic disciplines (and geosciences in general). It is often used to create climatological maps for physical, biological or chemical parameters representing e.g. monthly or seasonally averaged fields. Since instantaneous observations can not be directly related to a field representing an average, simple spatial interpolation of observations is in general not acceptable. DIVA (Data-Interpolating Variational Analysis) is an analysis tool which takes the error in the observations and the typical spatial scale of the underlying field into account. Barriers due to the coastline and the topography in general and also currents estimates (if available) are used to propagate the information of a given observation spatially. DIVA is a command-line driven application written in Fortran and Shell Scripts. To make DIVA easier to use, a web interface has been developed (http://gher-diva.phys.ulg.ac.be). Installation and compilation of DIVA is therefore not required. The user can directly upload the data in ASCII format and enter several parameters for the analysis. The analyzed field, location of the observations, and the error mask are presented as different layers using the Web Map Service protocol. They are visualized in the browser using the Javascript library OpenLayers allowing the user to interact with layers (for example zooming and panning). Finally, the results can be downloaded as a NetCDF file, Matlab/Octave file and Keyhole Markup Language (KML) file for visualization in applications such as Google Earth.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
GeoHydrodynamics and Environment Research
Département d'Astrophysique, Géophysique et Océanographie
Disciplines :
Earth sciences & physical geography
Author, co-author :
Barth, Alexander  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER) - Département d'astrophys., géophysique et océanographie (AGO)
Alvera Azcarate, Aïda  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Troupin, Charles  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Ouberdous, Mohamed ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER) - Modélisation du climat et des cycles biogéochimiques
Beckers, Jean-Marie  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Language :
English
Title :
A web interface for griding arbitrarily distributed in situ data based on Data-Interpolating Variational Analysis (DIVA)
Publication date :
27 September 2010
Journal title :
Advances in Geosciences
ISSN :
1680-7340
eISSN :
1680-7359
Publisher :
European Geosciences Union
Volume :
28
Issue :
28
Pages :
29-37
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
SeaDataNet
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
UE - Union Européenne [BE]
Available on ORBi :
since 10 January 2011

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