Towards a More Consistent Framework for Disseminated Spatial Computing for The National Map
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Transcript of Towards a More Consistent Framework for Disseminated Spatial Computing for The National Map
U.S. Department of the InteriorU.S. Geological Survey
National Geospatial Technical Operations Center
Towards a More Consistent Framework for Disseminated Spatial Computing for The
National Map
Michael P. Finn, Barbara S. Poore, and Mark R. Feller
Cyberinfrastructure Sessions
Outline
Motivation
The National Map, Goals, and Research OGC Standards and Web Services The Framework and Programming Interfaces Summary
Motivation
The computer-communications revolution blurred the distinctions among classes of computers and networks Resulting in integrated systems that transmit and process all types
of data and information (Stallings, 2007) Timely and accurate coverage of geospatial data at multiple
scales require a federated approach NSDI/ GSDI The National Map
Recent growth of integrated computer/ communications systems has resulted in a body of work on interoperability
Requirements for normalizing access to spatial data have resulted in ongoing efforts to provide standards-based specifications for acquiring and exploiting data (Kralidis, 2007)
The National Map, Goals, and Research
The National Map is the US’ topographic map for the 21st century Leverages developments in web services and partnerships Permits interactive public access to high-quality geospatial
data from many sources Designed to be a seamless, continuously maintained,
nationally consistent set of geographic data
USGS offers a series of Web map and data services Goal of presenting system developers and Web application
users with access to geographic data content
The research focus is on exploring new processes for information access and dissemination
OGC Standards and Web Services
Spatial information can be a unifier of many technology disciplines Need a common context, such as interoperability
mechanisms espoused by OGC (Lemmens, 2008)
Focusing on standard profiles To enhance The National Map’s WMS and map layer design
A key challenge is to produce standard profiles that are customized for USGS products While attaining stability between OGC standards and
proprietary data formats and protocols
The Framework for The National Map Showing focus on OGC Standard Profiles
(adapted from NRC, 2007)
The Framework and Programming Interfaces
The catalog database is an inventory of WMS data sources that contribute to The National Map
A fundamental requirement of geospatial data providers is to deliver data through a WMS (Raskin, 2004)
The National Map requires FGDC-compliant metadata for each layer
The Catalog API Query Service is the primary mechanism for making the database available to outside users and applications
The National Map Catalog Layer Summary
by major category
ADMINISTRATIVE
BOUNDARIES
CLIMATOLOGY/ CLIMATE CHANGE
COASTAL STUDIES
DIGITAL ATLASES
ELEVATION
ENVIRONMENTAL MONITORING/ ASSESSMENT
GEOGRAPHIC NAMES
GEOGRAPHY
GEOLOGY
GULF COAST RISK ASSESSMENT
HYDROGRAPHY
IMAGERY
LAND USE/LAND COVER
NATIONAL GRID
NATURAL HAZARDS/WEATHER
PUBLIC LAND RECORDS
STRUCTURES
TOPOGRAPHIC MAPS
TRANSPORTATION
Currently, there are approximately 3,300 layers available of which 2,080 are available to the PUBLIC through 213 services organized into these 20 major categories
Summary
This research effort is a cost-effective advancement Many USGS geospatial products are already built on OGC
standards
It addresses a critical question concerning the creation of OGC standard profiles to bring layers in The National Map databases into conformance with OGC standards
Thus, providing a consistent framework for computing for and from The National Map by normalizing access to spatial data
REFERENCES
Kralidis, Athanasios Tom (2007) Geospatial Web Services: The Evolution of Geospatial Data Infrastructure, in The Geospatial Web: How Geobrowsers, Social Software and the Web 2.0 are Shaping the Network Society, A. Scharl and K. Tochtermann, editors. London: Springer-Verlag.
Lemmens, Mathias (2008) New Age (Part 1). GIM International: The Global Magazine for Geomatics, Volume 22, Issue 1 (January).
National Research Council (2007) A Research Agenda for Geographic Information Science at the United States Geological Survey. Mapping Science Committee. 156 pages.
Raskin, Rob (2004) Guide to Distributing Your Data Products Via WMS 1.1.1: A Tutorial for Data Providers. Internet at http://oceanesip.jpl.nasa.gov/esipde/guide.html. Last accessed 28 March 2008.
U.S. Department of the InteriorU.S. Geological Survey
National Geospatial Technical Operations Center
Towards a More Consistent Framework for Disseminated Spatial Computing for The
National Map
Michael P. Finn, Barbara S. Poore, and Mark R. Feller
http://cegis.usgs.gov/index.html