Web Mapping Web Mapping Service Service

Development For Development For DMSP Satellite DMSP Satellite

Data Data Chris Elvidge, NOAA National Chris Elvidge, NOAA National Geophysical Data CenterGeophysical Data Center

Ben Tuttle, Cooperative Institute Ben Tuttle, Cooperative Institute for Research in Environmental for Research in Environmental

Sciences, University of ColoradoSciences, University of Colorado

24th APAN Meeting (Xi'An, China)24th APAN Meeting (Xi'An, China)

Open Geospatial Open Geospatial Consortium, INC. (OGC)Consortium, INC. (OGC)

A non-profit, international, A non-profit, international, voluntary consensus voluntary consensus standards organization that standards organization that is leading the development of is leading the development of standards for geospatial and standards for geospatial and location based services. location based services.

Web Mapping Service Web Mapping Service (WMS)(WMS)

Produce maps of spatially Produce maps of spatially referenced data dynamically referenced data dynamically from geographic informationfrom geographic information

A map is not the data itself A map is not the data itself Generally rendered in a Generally rendered in a

pictorial format such as PNG, pictorial format such as PNG, GIF or JPEGGIF or JPEG

Web Coverage Service Web Coverage Service (WCS)(WCS)

A standard web service for A standard web service for exchanging geospatial dataexchanging geospatial data

Returns the actual data (not Returns the actual data (not a picture as with WMS)a picture as with WMS)

Returns georeferenced data Returns georeferenced data in formats such as GeoTiffin formats such as GeoTiff

GoalsGoals

A scalable method for data A scalable method for data visualization and distributionvisualization and distribution

Easy access to data via Easy access to data via multiple methodsmultiple methods

Access ControlAccess Control Ability for clients to select an Ability for clients to select an

ROIROI

Why OGC Web Service Why OGC Web Service Standards?Standards?

View via Virtual GlobeView via Virtual Globe

View via Web BrowserView via Web Browser

View via Map ViewerView via Map Viewer

View/Download via Custom View/Download via Custom ClientsClients

Connect via Commercial Connect via Commercial and Open Source Software and Open Source Software

PackagesPackages ENVI/IDL support WMS and ENVI/IDL support WMS and

WCSWCS ArcGIS supports WMS (ESRI ArcGIS supports WMS (ESRI

plans future support for WCS)plans future support for WCS) Geographic Data Abstraction Geographic Data Abstraction

Library (GDAL) supports WCSLibrary (GDAL) supports WCS

ArchitectureArchitecture

Products generated with IDL and Products generated with IDL and RubyRuby

Web Services Provided with Web Services Provided with Minnesota MapServer (Open Minnesota MapServer (Open Source) and Ruby (Open Source)Source) and Ruby (Open Source)

Username and password Username and password authenticationauthentication

ProductsProducts

Global Composites 1992-Global Composites 1992-20032003

Daily MosaicsDaily Mosaics

Lunar Cycle CompositesLunar Cycle Composites Average Lights, Average Vis, Cloud Average Lights, Average Vis, Cloud

Free Coverage, Coverage, Percent Free Coverage, Coverage, Percent Lights, Std. Dev. VisLights, Std. Dev. Vis

Gas FlaringGas Flaring

Red 2006Red 2006 Green 2000Green 2000 Blue 1992Blue 1992

Surfing DMSP Gas Flares Through Surfing DMSP Gas Flares Through Google Earth!Google Earth!

Pinning Down the Locations of Flares!Pinning Down the Locations of Flares!

Finding Balls of Fire in the Digital Globe Finding Balls of Fire in the Digital Globe Base Imagery!Base Imagery!

QuestionsQuestions

http://www.ngdc.noaa.gov/dmsp/http://www.ngdc.noaa.gov/dmsp/maps.htmlmaps.html