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Mapping Glacier Data and Photographs via GeoServer and Virtual Globes

This article discusses the use of GeoServer and Virtual Globes to map glacier data and photographs, including an overview of the Glacier Photograph Collection, Google Earth demonstration, and the availability of the World Glacier Inventory as a KML file through GeoServer.

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Mapping Glacier Data and Photographs via GeoServer and Virtual Globes

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  1. Mapping Glacier Data and Photographs via GeoServer and Virtual Globes Lisa M. Ballagh, I-Pin Wang and Allaina Wallace National Snow and Ice Data Center, Boulder Colorado Background: Muir Glacier, 2004, taken by Bruce F. Molnia, Glacier Photograph Collection

  2. Overview • Glacier Photograph Collection • Glacier data sets • Google Earth demonstration • GeoServer overview • NSIDC’s Virtual Globes site • GLIMS • Fluctuations of Glaciers World Glacier Inventory

  3. Glacier Photograph Collection • Coverage primarily includes • Alaska and Greenland • Doubled in size since Jan. 31, 2008 • USGS Ice and Climate Project • Contributions from Austin Post • 10,000+ photographs online

  4. Arapaho Glacier Jon Van de Grift August 2004 Junius Henderson September 1912 Henry A Waldrop September 1966

  5. Repeat Photography Holgate Glacier Bruce F. MolniaAugust 2004 Ulysses S. GrantJuly 1909

  6. World Glacier Inventory (WGI) • Online database of 100,000+ glaciers • Snapshot of glacier data including • Latitude/longitude • Total area • Mean depth • Photo year • Topographic scale • and more... • http://nsidc.org/data/g01130.html

  7. WGI in Google Earth • Objective: Make WGI data accessible from Google Earth (or another Virtual Globe) • Problem: Data set size would create an unreasonably large static KML file • Solution: Dynamically request area-specific WGI data from GeoServer

  8. WGI  KML SQL Server OpenLayers PDF MySQL GeoServer Input Output PostGIS KML Oracle SVG Shapefile GeoRSS

  9. A View from Google Earth

  10. A View from Google Earth

  11. A View from Google Earth

  12. A View from Google Earth

  13. At the Heart: GeoServer • Open source server • Key: interoperability • Supports OGC standards • “Share and edit geospatial data” • GUI-driven

  14. GeoServer  Google Earth • Auto-generated KML file is user unfriendly • Use templates and Styled Layer Descriptors (SLDs) to customize the output in KML • Create a KML template • Helps with data presentation • Develop a Styled Layer Descriptor • Snowflake Placemarks

  15. GeoServer • Example SLD

  16. GeoServer • Example KML template (description.ftl)

  17. NSIDC’s Virtual Globes Site • http://nsidc.org/data/virtual_globes/

  18. Summary • Glacier Photograph Collection has doubled • WGI now available as a KML file • GeoServer helps serve data through Google Earth • Users can view two data sets in a spatial environment • Thanks to NOAA’s National Geophysical Data Center • Questions/comments: • Lisa Ballagh (vtlisa@nsidc.org)

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