Environmental Monitoring: Database and Beyond Chengyang Zhang Computer Science Department University of North Texas.

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Presentation transcript:

Environmental Monitoring: Database and Beyond Chengyang Zhang Computer Science Department University of North Texas

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

System Architecture 1 Database Server Internet Client Data Browsing and Processing Base Station Node Wireless Sensor Nodes GPRS Modem Gateway (Single Board Computer) GPRS Link Data loggers 1 Jerry’s slide

Current Data Flow Pull COD Daemon Push UV Daemon Wireless Data Daemon DBChecker Daemon Pull/Push

Raw Data Format  COD FTP Data  Directory Structure: YEAR/MONTH/cod_date_time  2007/9/cod_ _8.30  File Format: Station_Name/Gate_Name, date, time, rain_guage_reading/gate_status  RG1, 9/21/2007, 8:30:57 AM, 0.00  HC_N_Gate_STATUS, 9/21/2007, 8:30:57 AM, UP  UV Data  Directory Structure: YEAR/MONTH/ uv_ date_time.txt  2007/9/uv_ _12.30  File Format: Date, Time, SUV #1, UVA #2, Temp 1, Temp2  “ ”, “12:30”, 1.367, 0.000, 32, 0

Raw Data Format(cont.)  Wireless Data  Data Transmission Rate  every hour (send 4 data packets)  can be adjusted  Data Packet Format  Directory Structure: YEAR/MONTH/greenbelt_date_time  File Format: Date, time, value #1, value #2, …… datetimeSensor Data 4 byte18 * 4 bytes or More

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  EML  SensorML  KML

DBMS Selection  Free/Open Source v.s. Commercial Database  We choose Free!  PostgreSQL v.s. MySQL  We choose PostgreSQL!  Data Integrity Check  Server-side Programming  Spatial Cartridge Support(PostGIS)

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  EML  SensorML  KML

Database Schema Design

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

Web Interface (Powered by PHP)

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

Virtual Earth Interface

Google Map Interface (KML)

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

Multi-Layer System Structure * * From CRI proposal

Data Exchange  Motivation  Retrieve data from Web-enabled Sensor Data Repositories  Publish our sensor data as web-enabled service  Technology Behind the Scene  XML  Web Service

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

XML Derivatives KML ( Keyhole Markup Language ) A markup language for displaying geographical data in an earth browser * Example City of Denton: Doyle and Freeman Rain Gauge Reading: 0 inch , *

XML Derivatives (Cont.) EML ( Ecological Metadata Language) A markup language developed by/for the ecological discipline * * eml packageId: UNTCSE.1.1 system: knb dataset title: Greenbelt Wireless Soil Moisture Dataset creator individualName contact surName:Chengyang surName: Shu individualName

XML Derivatives (cont.) GML ( Geography Markup Language ) * A markup language defined by the OGC to express geographical fatures Example 0,0 100,0 100,100 0,100 0,0 100, , ,300 *

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

XML Derivatives (cont.) SensorML ( Sensor Model Language ) * An OGC standard o describe processes of sensor measurements and observations discover sensors obtain sensor information access sensor observations receive alerts *

SensorML (cont.) SensorML ( Sensor Model Language ) * *

O&M O&M ( Observations & Measurements ) * *

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement(SWE)

Web Services *  Web Services – A program that can be executed through HTTP and XML  SOAP (Simple Object Access Protocol)  Request / Response  WSDL (Web Service Description Language)  Describes how to connect and query information  UDDI ( Universal Description Discovery and Integration)  Service Registration And Discovery *

Web Services(cont.)  SOAP Examples  Request <m:SoilMoistureDataRequest xmlns:SOAPSDK1=" Hourly  Response <SoilMoistureDataResponse xmlns:SOAPSDK1=" ">.....

Web Services(cont.)  WSDL Examples

Overview  Data Transmission and Storage  Database Design  DBMS  Database Schema Design  Data Presentation  Traditional Web Interface  Virtual Earth / Google Map  Data Exchange  XML Derivatives  SensorML/O&M  Web Services  Sensor Web Enablement (SWE)

Sensor Web Enablement * Decision Support Tools - vendor neutral - extensive - flexible - adaptable Heterogeneous sensor network In-Situ monitors Bio/Chem/Rad Detectors Surveillance Airborne Satellite - sparse - disparate - mobile/in-situ - extensible Models and Simulations - nested - national, regional, urban - adaptable - data assimilation Sensor Web Enablement - discovery - access - tasking - alert notification web services and encodings based on Open Standards (OGC, ISO, OASIS, IEEE) * vast.uah.edu/SensorML/presentations/SWE_SensorML_Botts.ppt

SWE Services  SOS (Sensor Observation Services)  Formerly SCS  fetch observations  Response to queries  WNS (Web Notification Services)  asynchronous notification of sensor events  two-way  SPS (Sensor Planning Services)

SWE Deployment  Database (Spatial Database Preferred)  Intermediate Program(Middleware)  that converts sensor schema and readings to SensorML/O&M  javabeans etc,  XML Parser  SAX etc.  SOAP Toolkit  Apache soap toolkit etc.

Thank you!