Title: Underpinning technologies for oceanographic data sharing, visualization and analysis
1Underpinning technologies for oceanographic data
sharing, visualization and analysis
- Jon Blower, University of Reading, UK
- Frederique Blanc, CLS, France
- Peter Cornillon, University of Rhode Island, USA
- Steve Hankin, PMEL, USA
- Thomas Loubrieu, IFREMER, France
2?
3Key technologies
- NetCDF
- Array-based, binary, platform-independent data
format - CF
- Metadata conventions
- Spatial and temporal referencing
- Controlled vocabulary
- (See Steve Hankins poster)
- OPeNDAP
- Access remote data in same way as local files
- Perform data subsetting on the server
- Reduces network traffic
4Matlab OPeNDAP toolbox
5- LAS is a Product Server
- Reads data from network sources
- Creates graphs, maps and file subsets
netCDF, HYCOM binary, ASCII, GIS layers
6(No Transcript)
7MERSEA Discovery
8MERSEA Viewing services
9MERSEA Download services (via OPeNDAP)
Search and subset criteria
THREDDS Data servers From TAC/MFC
Search and download
Relevant datasets
10MERSEA information system
http//www.mersea.eu.org/ gt Access to Products
11From MERSEA to MyOcean
12The present
- What we are good at
- Sharing (most) gridded data within scientific
community - Delivering basic information on the web
- What we could be better at
- Sharing in situ or remotely sensed data
- Sharing data outside scientific community
- Joining up our efforts
13New frontiers 1Reaching new audiences
14Open Geospatial Web Services
Web Feature Service
Simple features
Complex features
(plus many more, inc. Sensor Observation Service)
15GIS compatibility through Web Map Services
16Godiva2 interactive visualization on the web
- Interactively explore 4D geospatial raster
datasets on the web - (used in MERSEA as Dynamic Quick View)
http//www.reading.ac.uk/godiva2
17Selection of depth
Select from all the depth levels of the model
18Selection of time (range)
Select from all the timesteps in the model
Selection of a time range leads to an animation
19Finding the data value at a point
Click on the data layer, data value and precise
position is shown
Lon -64.08 Lat 36.21 Value 19.27
20Timeseries plots
If a time range is selected, can create a
timeseries plot at a point
21Vector plots
22Selection of colour palette
23Contrast-stretching
24Polar projections
25Choice of background images
26Search and Rescue
27Search and Rescue
28Summary open GIS technologies
- Can help reach wide audience
- KML (Google Earth) widely used for sharing
geographic information - Web Mapping Services also emerging
- Sharing real data is much harder
29New frontiers 2data integration and
intercomparison
303. Integration of climate products and data
GHRSST-JPL
ECCO-JPL
AVISO
OSCAR
SODA
GODAS
31Model-data intercomparison on the web
32Model-data intercomparison on Google Earth
OceanDIVA
33A vision
- Low-cost creation of user applications through
reuse of reliable tools and services - For all oceanographic data
- On the web or the desktop
- For a variety of users
34What is needed to make this happen?
- Close communication between users, technologists
and data providers - Standards bodies must provide useful standards
that achieve wide adoption - Sensible data access policies
- Jim Gray May all your problems be technical