LAS and THREDDS: Partners for Education Roland Schweitzer Steve Hankin Jonathan Callahan Joe Mclean Kevin O’Brien Ansley Manke Yonghua Wei

The LAS, The THREDDS and The Wardrobe Roland Schweitzer Steve Hankin Jonathan Callahan Joe Mclean Kevin O’Brien Ansley Manke Yonghua Wei

25 May DLESE Data Services Workshop 3 What’s in Store The Live Access Server (LAS) The Live Access Server (LAS) What is LAS?What is LAS? ObjectivesObjectives ArchitectureArchitecture CustomizationCustomization THREDDS and LAS THREDDS and LAS Current capabilitiesCurrent capabilities Future plansFuture plans

25 May DLESE Data Services Workshop 4 Lost in a cloud of data?

25 May DLESE Data Services Workshop 5 LAS and THREDDS can help

25 May DLESE Data Services Workshop 6 The Live Access Server (LAS) A highly configurable Web server designed to provide flexible access to geo-referenced scientific data

25 May DLESE Data Services Workshop 7 Objectives for LAS Web-based interface to diverse data and the capabilities of intelligent “back-end” visualization software Web-based interface to diverse data and the capabilities of intelligent “back-end” visualization software Single interface for sub-setting, download, visualization, comparison Single interface for sub-setting, download, visualization, comparison Easy access to metadata and documentation Easy access to metadata and documentation Unified access to distributed data holdings Unified access to distributed data holdings Customizable user interface Customizable user interface LAS accommodates many data providers and educators.

25 May DLESE Data Services Workshop 8 LAS Architecture browser UI (java/script) gif,netCDF,etc. servers LAS UI server LAS product server LAS XML configuration metadata browser interface back end (Ferret or GrADS or others) product request (XML) scripts/commands products data

25 May DLESE Data Services Workshop 9 LAS uses OPeNDAP Data OPeNDAP is a technology that allows clients to use remote data via a local file API OPeNDAP is a technology that allows clients to use remote data via a local file API Servers exists for binary, GRIB, netCDF and HDF data files Servers exists for binary, GRIB, netCDF and HDF data files LAS installations can be configured to use both local data and data served from a remote OPeNDAP server LAS installations can be configured to use both local data and data served from a remote OPeNDAP server

25 May DLESE Data Services Workshop 10 browser UI (java/script) gif,netCDF,etc. servers LAS UI server LAS product server LAS XML configuration metadata browser interface back end (Ferret or GrADS or others) product request (XML) scripts/commands products data LAS Architecture with OPeNDAP OPeNDAP OPeNDAP Server

25 May DLESE Data Services Workshop 11 Customization Features Expanded hierarchies Expanded hierarchies Custom HTML headers Custom HTML headers Custom pages for data set and variable selection Custom pages for data set and variable selection Custom back-end operations (products) Custom back-end operations (products) Use of “product server” with user’s own interface client Use of “product server” with user’s own interface client

25 May DLESE Data Services Workshop 12 Example (Expanded Hierarchy) The NVODS Server (

25 May DLESE Data Services Workshop 13 Example (Custom Headers) The NVODS Server (

25 May DLESE Data Services Workshop 14 Example (Custom Selection) Experimental Development Server

25 May DLESE Data Services Workshop 15 Example (Custom Backend) NGDC (

25 May DLESE Data Services Workshop 16 Example (User’s Own Interface) Marine Environmental Prediction System funded by the Canadian Foundation for Climate and Atmospheric Sciences (

17 Behind the Wardrobe The magic land of the future!

25 May DLESE Data Services Workshop 18 Ferret Data Server (FDS) FDS is an OPeNDAP server implementation (based on Anagram) FDS is an OPeNDAP server implementation (based on Anagram) FDS has some extended capabilities (similar to GDS). FDS has some extended capabilities (similar to GDS).

25 May DLESE Data Services Workshop 19 Extended Capabilities of FDS Create and serve data sets as result of an analysis operation on-the-fly Create and serve data sets as result of an analysis operation on-the-fly Add or modify inadequate metadata Add or modify inadequate metadata Fix coordinate system deficiencies Fix coordinate system deficiencies Missing axesMissing axes Axes reorderingAxes reordering Corrupted coordinatesCorrupted coordinates Aggregate time-series files into one URL Aggregate time-series files into one URL Embed analysis requests into URL Embed analysis requests into URL

25 May DLESE Data Services Workshop 20 LAS and THREDDS Every LAS installation can present a Dataset Inventory Catalog of the underlying data sets Every LAS installation can present a Dataset Inventory Catalog of the underlying data sets (Needs to be upgraded to 1.0 Schema) (Needs to be upgraded to 1.0 Schema) (Needs correct service type for both LAS operations and FDS services) (Needs correct service type for both LAS operations and FDS services)

25 May DLESE Data Services Workshop 21 LAS, THREDDS and FDS All of the data behind an LAS installation has been “regularized” All of the data behind an LAS installation has been “regularized” LAS will have an FDS OPeNDAP URL as an output product LAS will have an FDS OPeNDAP URL as an output product Subsets can be defined via geographic and time constraints Subsets can be defined via geographic and time constraints Any sub-set of any LAS data set can become an OPeNDAP data set. Any sub-set of any LAS data set can become an OPeNDAP data set.

25 May DLESE Data Services Workshop 22 More Information Subscribe to the LAS User’s mailing list Subscribe to the LAS User’s mailing list

25 May DLESE Data Services Workshop 23 The End