Developing Metadata Standards for GLEON

Barbara Benson

gleon.org

In-Lake Measurements• water temperature • dissolved oxygen concentration • dissolved oxygen saturation• chlorophyll fluorescence• phycocyanin fluorescence• pH• specific conductance• colored dissolved organic matter fluorescence• carbon dioxide partial pressure• reduction/oxidation potential• nitrate concentration• chloride concentration• shortwave light penetration • PAR light penetration• turbidity• horizontal water velocity• vertical water velocity• lake level• wave height• wave period

Meteorological Measurements

• wind speed • wind direction• total shortwave radiation• photosynthetically active radiation• longwave radiation• ultraviolet radiation• relative humidity• air temperature • precipitation• barometric pressure

Question

• Are there any other measurements being made on GLEON lakes directly with sensors that should be added to the Measurement Type list?

Water Temperature: Apprise Technology TempLine (with SDI-12 option)

Dissolved Oxygen Concentration: Greenspan Model DO1200 (retired); Zebra-Tech Ltd. D-Opto (currently being used)

YSIHydroLab

Dissolved Oxygen Saturation:Zebra-Tech Ltd. D-Opto

Wind Speed: Gill 3 Cup Anemometer  (RM Young Model 12102)

Relative Humidity: VaisalaHMP50

Air Temperature: Vaisala HMP50

Photosynthetically Active Radiation: LI-COR LI-192

Precipitation:Tipping  Bucket (manufacturer unknown)

Variables / Sensors

Question

• What changes should we make to the form for inputting measurement type and sensor information?

Questions

• How should we add new measurement types and sensors to the list?

• How should these additions be vetted?

Question

• What kinds of queries of the knowledge base should be possible?

• What sites are measuring variable X? Who is the expert contact at each of these sites? List the sensors used to measure X at each site?

• Similar questions but for lakes• What sites have experience with sensor Y?

Metadata play several roles within the information system.

For example:1) instrument deployment/maintenance2) system configuration and data flow3) documentation of methods4) quality assurance4) interpretability of data by scientists5) data discovery, data access, and data harmonization6) data analysis and visualization

Raw Data Channel Channel_Sensor Channel_Optableidentified by Channel id Channel id Channel idview Sensor id Oracle table name - Observation type Oracle attribute name - Depth Trigger - Temporal resolution - Location id

Platform_Deploy Controller_Deploy Instrument_Deploy Sensor_DeployPlatform id Controller id Instrument id Sensor idGPS coordinates Platform id Controller id DepthLocation id Deploy date-time Depth CodeLocation description Deployer nameComments Rep_number

Comments

Program Instrument_history_logProgram name Instrument idController id Location idFieldNames Platform idFieldOrder Controller idSampFreq Deploy date-timeUnits Deployer nameRectype Removal date-timeChannel id Remover name

Comments

INSTRUMENT MANAGEMENT METADATA MODELNorth Temperate Lakes LTER (draft)

Platform_Catalog Controller_Catalog Instrument_Catalog Sensor_CatalogPlatform id Controller id Instrument id Sensor idPlatform name Manufacturer Serial number Sensor indexPlatform description Make Instrument type Instrument idManufacture date Model Instrument name Observation typeOwnership Type Instrument description CalibMultiplier CurrentComments OS Instrument label CalibOffset Current

MemCapacity Number of sensors Analog Output UnitInterfaceProtocol Depths / intervals Output Type

Vendor_Catalog Vendor InterfaceProtocol OwnershipName Purchase date ManufacturerAddress Purchase price MakePhone Ownership ModelEmail Retirement date VendorWebsite Purchase dateContact person Purchase price

OwnershipRetirement date

INSTRUMENT MANAGEMENT METADATA MODELNorth Temperate Lakes LTER (draft) ---- continued

Discussion: Observation attributes

• Measurement type• Unit• Location

– GPS and geographic description (lake name)– Z coordinate (depth or height)

• Timestamp• Temporal resolution• Method (sensor type)• Data quality• Contributor• Access restrictions

Examples of Metadata Standards

• Marine Metadata Interoperability

• Sensor Markkup Language

• Ecological Metadata Language