Future Development Plans

Future Development Plans Funded WCS/WFS support added to Hyrax netCDF Client Library integration Current research Cataloging/Discovery Wish list Aggregation SQL handler File responses WMS

OGC’s WCS/WFS NASA is currently funding development of a plugin so Hyrax can read from a WCS server WCS data exposed using DAP IOOS/NOAA has funded a proposal to develop a WCS and WFS interface for Hyrax DAP data exposed using WCS/WFS

WCS/WFS: How Using DAP4’s DDX response Use namespaces to categorize the attributes as belonging to DAP, WCS, WFS, et cetera Develop an ontology to map between those namespaces (i.e., sets of attributes) The data models for both DAP and WCS/WFS are similar enough to enable a crosswalk using an inference engine The ontology(ies) used will model both the Interfaces (DAP, WCS, WFS) and the response semantics.

The netCDF Client Library NSF funded two year effort Move support for the netCDF Client Library out of OPeNDAP and into Unidata Unidata is the author of netCDF Our library is currently a ‘version’ of their official library The software will move into Unidata’s source code repository and will be an integral part of all future releases of netCDF.

netCDF Client Library: How Using the Ocapi C library we developed recently The current netCDF CL software is written in C++ The design will be recast in C The libdap (C++) code will be replaced by Ocapi (C) code CDM support will be integrated

Cataloging & Discovery NSF funded research effort with UCSB and URI Using a crawler to harvest metadata Developing clustering techniques to automatically build inventories Inventory search is closely related to data source aggregation

Inventories An inventory is a catalog that falls between the individual data sources (DAP URLs, files, database blobs) and a list of ‘logical’ datasets A logical dataset is what a person typically thinks of when they use the word ‘dataset’ The inventory collects all the pieces that the computer manages and lists each one that makes up the logical dataset My apologies for the phrase ‘logical dataset’

Aggregation As TDS currently supports, data sources (e.g., files) from within an ‘inventory’ are combined into a virtual data source The virtual data source is typically ‘extended’ and choosing points along this extension is effectively searching an inventory Example: A set of two-dimensional images are combined to form a cube with the new dimension the date/time of image capture Choosing a range of dates/times along that new axis returns the same data as choosing individual inventory entries

Other things we would like … SQL A handler for SQL Currently pyDAP and DRDS provide this support Please contact us before using DRDS as it is no longer supported File-type responses We would like for Hyrax to be able to return a netCDF, HDF4/5 or GeoTIFF file The server can return ASCII CSV responses now and we have some work done on a netCDF tool, but no funding WMS Since we have WCS/WFS support planned, WMS support is a natural thing to expect.