view_hdf

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Information about view_hdf
Technology

Published on February 24, 2014

Author: HDFEOS

Source: slideshare.net

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Source: http://hdfeos.org/workshops/ws02/presentations/hunt/hunt.ppt

view_hdf Kam-Pui Lee, SAIC CERES Data Management Team Linda Hunt, CSC NASA Langley DAAC HDF-EOS Workshop II September 22, 1998

Introduction * NASA Langley Research Center has developed the Clouds and the Earth's Radiant Energy System (CERES) instrument to study the Earth's climate and environment * The CERES Data Management System has been developed by the Atmospheric Sciences Division to generate science data products from the instrument measurements * This system is now operational at the Langley Distributed Active Archive Center (DAAC) producing archival data sets written in Hierarchical Data Format (HDF)

* A visualization and analysis tool (view_hdf) has been written in Interactive Data Language (IDL) to access data from HDF products * This tool is developed on a UNIX platform with a graphical user interface (GUI) to manipulate the data * User does not need any knowledge of HDF * view_hdf has been tested on Solaris, IRIX, HP-UX and DEC Alpha operating systems

Capabilities of view_hdf * Select and subset variables from either Science Data Sets (SDS) or Vdata structures * Render both two and three dimensional graphics * Plot geolocated data onto various world map projections * Plot multiple variables * Plot difference of two variables * Compute statistics * Create subset of data based on the range of another criterion variable * Display data from the screen * Save plot in Postscript or GIF format * Send plot directly to a printer * Export data to a file in ASCII format

User's Guide * The URL for the draft User's Guide to view_hdf is: http:// asd-www.larc.nasa.gov/ceres/collect_guide/list.html (will be relocated at the DAAC when final version is available) Contacts for Data Center/Data Access Information and view_hdf program: Langley DAAC User and Data Services Office NASA Langley Research Center Mail Stop 157D 2 South Wright Street Hampton, VA 23681-2199 USA Telephone: (757) 864-8656 FAX: (757) 864-8807 E-mail: larc@eos.nasa.gov URL: http://eosweb.larc.nasa.gov

User's Guide * The URL for the draft User's Guide to view_hdf is: http:// asd-www.larc.nasa.gov/ceres/collect_guide/list.html (will be relocated at the DAAC when final version is available) Contacts for Data Center/Data Access Information and view_hdf program: Langley DAAC User and Data Services Office NASA Langley Research Center Mail Stop 157D 2 South Wright Street Hampton, VA 23681-2199 USA Telephone: (757) 864-8656 FAX: (757) 864-8807 E-mail: larc@eos.nasa.gov URL: http://eosweb.larc.nasa.gov

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