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Maps, Maps and More Maps: Three Approaches to Reach the Masses

Maps, Maps and More Maps: Three Approaches to Reach the Masses. Lisa M. Ballagh, John C. Cartwright, and Allaina M. Wallace. Data Set Accessibility. Methods of Distribution. GeoRSS. Glacier Photograph Collection at NSIDC. Web Map Service. Google Earth (KML).

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Maps, Maps and More Maps: Three Approaches to Reach the Masses

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  1. Maps, Maps and More Maps: Three Approaches to Reach the Masses Lisa M. Ballagh, John C. Cartwright, and Allaina M. Wallace

  2. Data Set Accessibility Methods of Distribution GeoRSS Glacier Photograph Collection at NSIDC Web Map Service Google Earth (KML)

  3. The National Snow and Ice Data Center… Manages and distributes scientific data Performs scientific research Supports data users Educates the public about the cryosphere Creates tools for data access 3 Slide courtesy NSIDC

  4. Glacier Photograph Collection http://nsidc.org/data/g00472.html • History: • 1880s to present • Aerial and terrestrial photos • Collection began at AGS, moved to USGS and then to WDC for Glaciology in Boulder in 1976 • Photographs, slides, glass plate negatives and microfilm

  5. Glacier Photograph Collection • History continued: • Digitization via NOAA’s Climate Database Modernization Program began in 2001 • Over 13,000 photos available online • Different collections (e.g. Austin Post – microfilm at NSIDC; originals at U. of Alaska, Fairbanks) • Repeat photographs

  6. GeoRSS • What is a GeoRSS feed? • XML file (RSS feed) with temporal news + location • GeoRSS feed with glacier photo updates: • http://nsidc.org/noaa/nsidc_georss.xml • Types: Simple and GML • Example clients: • - ACME • - Google Maps • - Mapufacture

  7. GeoRSS feed in Google Maps

  8. GeoRSS feed in Google Maps

  9. GeoRSS file

  10. Web Map Service What is a Web Map Service? A service (URL) that renders map images WMS “GetCapabilities” URL for glacier photos: http://glims.colorado.edu/cgi-bin/glims_ogc?service=WMS&request=GetCapabilities&version=1.1.1 Interesting information about a WMS: Consumer and provider are uncoupled Consumer can combine data from multiple sources Beneficial for interoperability with other data services Example clients: Google Earth (Desktop client) ArcMap (Desktop client) OpenLayers (JavaScript library)

  11. Web Map Service Viewer using OpenLayers

  12. Code to create a WMS viewer via OpenLayers

  13. Google Earth • Steps to make data/images available in Google Earth: • 1. Download Google Earth (http://earth.google.com) • 2. Create Keyhole Markup Language (KML) file or use GUI • 3. Open/view file in Google Earth • What is KML? • XML-based format that shows geographic data in a viewer • KML files with glacier photos: • http://nsidc.org/data/virtual_globes/ (search for glaciers) • Example clients: • - NASA World Wind • - Google Earth

  14. Google Earth

  15. Glacier Photograph Metadata

  16. Sample KML Code

  17. Take Home Points GeoRSS Relevant for temporal news items with a location Easy to implement Web Map Service WMS is a standard and has widespread adoption Important for interoperability Easy to use on the client side; more difficult to set up on the server side Google Earth (KML) Large user base Beneficial for education and outreach Implementation time varies, depending on amount of styling, size of data set, whether creating a KML file or using GUI, etc…

  18. Acknowledgements L. Ballagh: vtlisa@nsidc.org J. Cartwright: John.C.Cartwright@noaa.gov A. Wallace: allainaw@nsidc.org Thanks to: - NOAA’s Climate Database Modernization Program for funding the scanning of photographs - NOAA team at NSIDC for providing feedback - Janet Dombrowski for organizing this session!!! This work was funded by NOAA’s National Geophysical Data Center

  19. Extras: Glacier Photograph Collection • Austin Post collection  • Largest collection of glacier photos that we hold (100,000 photos – Alaska and Pacific NW)  • Majority of images at NSIDC are on microfilm (16mm cassettes and 35mm); some prints • Original negatives are held at the U. of Alaska, Fairbanks.  We've been collaborating with them to get the microfilm digitized because the originals are too fragile and too valuable to ship

  20. Extras: Web Map Service Potential sources for WMS services: ArcGIS Online (http://www.arcgis.com/home/) GeoSpatial OneStop (http://gos2.geodata.gov/wps/portal/gos) Google (try a search phrase such as "service=wms" that is commonly found within a map request URL) many local institutions keep their own lists, e.g. http://www.lib.ncsu.edu/gis/ogcwms.html OneGeology (http://portal.onegeology.org/)

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