Antarctic Digital Database A Paul R Cooper (GIS Manager)
Outline • What is the Antarctic Digital database? • How has it developed? • How is it accessed?
What is the ADD? • A topographic database • Primarily a vector database • Originally derived from published maps • Maintained for SCAR by BAS
What does the ADD contain? • 14 layers including Coast Rock outcrop Contours
What are the ADD’s sources? • Published maps • 7 nations supplied digital data. • 3 nations gave permission for maps to be digitised. • Ice sheets derived from SPRI folio • digitised from 1:3 000 000 compilation sheets. • Coastline updated from remotely sensed images.
Development of the ADD • Version 1.0 was published on CD in 1993 • Version 2.0 was published on the internet in July 1998. • Version 3.0 was published in July 2000. • Version 4.0 was published in August 2002 • Version 4.1 November 2003 • Version 5 went live in August 2007 • Incremental updates since then.
Version 2.0 • First version on the Internet • http://www.add.scar.org/ • Included many structural corrections. • Some new data between 0 and 90°W.
Version 3.0 • The first major upgrade to the content of the ADD • Ice sheet contours replaced • Based on altimetric DEM provided by Byrd Polar Research Center. • Result of collaboration between BPRC and BAS
Version 4.0 • New coastline for the sector between 30°W and 168°W • New data for Prince Charles Mountains • New coastline for Antarctic Peninsula • Position of Antarctic Peninsula data corrected.
Version 4.1 • New rock outcrop for the Antarctic Peninsula. • Detailed corrections to coast in Antarctic Peninsula
Version 5.0 • Complete revision of the web site • Provision of Web Feature service • Provision of Web Map service • New data including: • Coastal change in the Antarctic peninsula • Subantarctic Islands • South Georgia • Heard and Macquarie Islands • Made compatible with the Antarctic Spatial Data Infrastructure • Went “Live” in August 2007 • Continuing incremental upgrades
ADD Data management • Originally held as tiled ARC/INFO coverages • Still edited and maintained as coverages • Maintained using ESRI software • Working copy held in PostgreSQL/PostGIS
ADD and data standards • ADD originated when there were no standards to follow! • Now provided in wide variety of OGC compliant formats including: • WFS (OGC WMS 1.1.1) • WMS (OGC WFS 1.0 ) • GML (ISO 19136 and OGC) • KML (became OGC standard recently) • Working towards compliance with: • ISO 19115 (Metadata) • ISO 19110 (Antarctic Feature Catalogue, maintained by Australia)
Added Value Products • Antarctic Maps for Garmin GPS • BAS has created maps for use in Garmin GPS with map display • Hill shaded topography • Contours (labelled where accurate) • Rock outcrop • Coast, ice shelf, ice rumple • Field tested 2008-2009 field season • Modifications in line with experience being implemented • Contact BAS for further information • Will only be made available to experienced Antarctic operators.
The Future? • Improve data content • Add new data layers • Improve access • Integrate with other data sources: • Composite Gazetteer of Antarctica • UK Antarctic Placenames Committee
Conclusions • ADD provides the best topographic data for the whole of Antarctica. • ADD provides the essential underpinning for: • Operations. • Scientific investigations. • ADD is an ongoing programme. • Mapping Antarctica is a work in progress!