DIVA (Data-Interpolating Variational Analysis) allows the spatial interpolation/gridding of data (''analysis'') in an optimal way, comparable to optimal interpolation (OI), taking into account uncertainties on observations. In comparison to standard OI, used in

Data assimilation Data assimilation is a mathematical discipline that seeks to optimally combine theory (usually in the form of a numerical model) with observations. There may be a number of different goals sought – for example, to determine the optimal state es ...

, DIVA, when applied to ocean data, takes into account coastlines, sub-basins and advection because of its variational formulation on the real domain. Calculations are highly optimized and rely on a finite element resolution. Tools to generate the finite element mesh are provided as well as tools to optimize the parameters of the analysis. Quality control of data can be performed and error fields can be calculated. Also detrending of data is possible. Finally 3D and 4D extensions are included with emphasis on direct computations of climatologies fro
ODV
spreadsheet files. The software whose first version was available since 1996, can now be downloaded at th
DIVA
site and is the reference tool for calculating climatologies within the

SeaDataNet SeaDataNet is an international project of oceanography. Its main goal is to enable the scientific community to access historical datasets owned by national data centers. Description This project aims to provide a web service permitting to ret ...

projects. It has also been included as the state-of-the art gridding method in

Ocean Data View Ocean Data View (ODV) is a proprietary, freely available, software package for the analysis and visualization of oceanographic and meteorological data sets. ODV is used by a large number of oceanographers. The UNESCO Ocean Teacher project employs O ...

. The classical DIVA version is now superseded by an N-dimensional implementation: https://github.com/gher-uliege/DIVAnd.jl

Notes and references

{{reflist Data analysis software Earth sciences graphics software