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Mapping Glacier Data and Photographs via GeoServer and Virtual Globes

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. Overview.

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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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