1. Future Development Plans

2. 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

3. 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

4. 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.

5. 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.

6. 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

7. 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

8. 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’

9. 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

10. 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.