Conference article

Accessing External Data on Local Media and Remote Servers Using a Highly Optimized File Reader Library

Jörg Rädler
Berlin University of the Arts / Universität der Künste Berlin (UdK) Berlin, Germany

Manuel Ljubijankic
Berlin University of the Arts / Universität der Künste Berlin (UdK) Berlin, Germany

Christoph Nytsch-Geusen
Berlin University of the Arts / Universität der Künste Berlin (UdK) Berlin, Germany

Jörg Huber
Berlin University of the Arts / Universität der Künste Berlin (UdK) Berlin, Germany

Download articlehttp://dx.doi.org/10.3384/ecp12076323

Published in: Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany

Linköping Electronic Conference Proceedings 76:33, s. 323-332

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Published: 2012-11-19

ISBN: 978-91-7519-826-2

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

ncDataReader2 is an open-source solution for the efficient interpolating access to external data sets. The library of C-functions can be used with different applications and works well with Modelica. Data sets can be easily accessed as continuous functions using different interpolation and extrapolation methods. The application range covers reading generated or measured data; the integration of simulation results from Modelica or other systems and the validation; parametrization and optimization of models using external data. Data sources may be local files or remote servers. Using the netCDF file format; the DAP network protocol and different optimization approaches the data access can be surprisingly fast; even for large remote files with many variables containing millions of values.

Keywords

data; file; interpolation; network; weather; measure

References

[1] ncDataReader2: http://j-raedler.de/projects/ncDataReader2

[2] netCDF: http://www.unidata.ucar.edu/software/netcdf/

[3] DAP/OpenDAP: http://www.opendap.org/

[4] CSA: http://code.google.com/p/csa-c/

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[10] Pydap: http://pydap.org

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[14] DyMat: http://j-raedler.de/projects/DyMat

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