Critical Zone Observatory Data Discovery• Each CZO maintains its own data management system(s)
using the data formats it prefers• The three CZO’s have a common metadata management
system, expressed in tables, where each table record describes a particular data series or dataset, including its URL address
• CZO Metadata tables are published and accessed through the internet using Web Feature Services (WFS) defined by the Open Geospatial Consortium
• Metadata table records are linked to geographic features, also published as Web Feature Services to show data location on a base map
CZO Metadata Catalog Server
Sierra NevadaMetadata Server
Boulder CreekMetadata Server
Shale HillsMetadata Server
Metadata Catalog Services already exist for point observations time series at the Waters Network Testbed projects
A metadata catalog server is a device (e.g. ArcGIS Server, Minnesota Map Server), which can publish
CZO metadata in OGC web services format
CZO Data Types
1. Regular Time Series – data measured with automated sensors at a fixed location at regular intervals
2. Irregular Time Series – manually collected field samples from a fixed location at irregular intervals
3. GIS coverages and photos4. One-Time Collections – rock and soil samples
collected once at known position and depth5. Other Data – LIDAR, land surveys, channel cross-
sections, tree surveys, geophysics, snow surveys
Point Observations Time Series
Net Radiation (W/m2)
PI: Chris Duffy, Sue Brantley, Pat Reed, Henry Lin, ….
Shale Hills CZO Point ObservationsSusquehanna – Upper Juniata River Basin
URL Network SiteCode VarCode BeginDate EndDate Name
http//… ShaleHills RTHNet 516 5/1/2006 Net Radiation
http//… ShaleHills RTHNet 517 10/29/2005 Precipitation
http//… ShaleHills RTHNet2 516 5/1/2006 Net Radiation
Metadata table for Point Observations Time Series
Click on the URL retrieves the data file
Metadata for selected data series at observation point H1
Observations Catalog for Waters Network Testbed Project in Corpus Christi Bayhttp://129.116.104.172/ArcGIS/services/CCBAY_MySelect/GeoDataServer/WFSServer
displayed over the US Hydrology Base Map from http://downloads2.esri.com/resources/arcgisdesktop/maps/us_hydrology.mxd
WSDL address and parameters to obtain observations data using GetValues
5
The same metadata structure supports data access through WaterML
Data Access from the CZEN Portal
http://www.czen.org/Data
Sierra NevadaMetadata Server
Boulder CreekMetadata Server
Shale HillsMetadata Server
Metadata is transmitted in Geographic Markup Language
Behind the CZEN portal is a Master Metadata Catalog that is compiled from the CZO metadata services. The Master Catalog supports seamless data searches across the CZO network
HIS Desktop (to be developed in 2009)Harvesting data from web services
Observations
Models
Climate
GIS
Remote Sensing
HIS Desktop can be rebranded to become CZO Desktop if necessary
Data Access from CZO Desktop
Sierra NevadaMetadata Server
Boulder CreekMetadata Server
Shale HillsMetadata Server
Each CZO metadata catalog service and thus the CZO data is directly accessible to anyone using CZO Desktop