Planned Title: Review of Evaluation of Geospatial Search

Allan Doyle

Geospatial One-Stop

• Provides improved access to geospatial information.

• Required as part of U.S. Office of Management and Budget (OMB) sponsored initiative.

• Displays NASA projects/missions over $1 million.• GCMD created NASA portal of projects/missions.• GCMD developed project authoring tool for

metadata creation.• By Winter 2004, projects and missions $500,000

and greater must be documented.• Future with Geospatial One-Stop.

NASA’s Geospatial One-Stop Geospatial One-Stop

Allows for project metadata authoring.

Project Metadata Tool

OMB Geospatial Framework Portal

• Requested portal by the U.S. Office of Management and Budget (OMB).

• Portal highlights geospatial investments consisting of framework layers within NASA and its Earth Science Information Partners (ESIP).

• Framework layers include: cadastral, digital ortho imagery, elevation bathymetric, elevation terrestrial, government units, transportation, hydrography, and geodetic controls.

NASA’s Geospatial Framework Portal

Need for Enhanced Geospatial Search

Geospatial Evaluations

Geospatial Aspirations of the GCMD

• Current functionality.

• Behind the search interface.

• DEMO of geospatial search.

• Providing a geospatial search interface in a metadata directory is critical in helping the user define a search on data.

• Investigating various geospatial search engines and software might be the best solution in developing a new geospatial search interface for the GCMD.

• Staff evaluated various geospatial search applications to determine pros and cons.

Geospatial standards are important in making disparate data available to the entire public.

Geospatial Standards for the GCMD

• Goddard’s Geospatial Interoperability Office (GIO) promotes open standards that will enable users to access distributed geospatial data over the Internet.

• FGDC (Federal Geographic Data Committee) develops the National Spatial Data Infrastructure (NSDI) in coordination with local, state and tribal governments.

• GCMD actively participates in GIO and FGDC telecons.

• The Open GIS consortium leads the development of geoprocessing interoperability computing standards.

• Some important standards include:

WMS (Web Map Service)

WFS (Web Feature Service)

WCS (Web Coverage Service)

GML (Geography Markup Language)

Bounding Box Search Polygon Search

Proposal to Incorporate Polygon into DIF• Incorporate a polygon search into the DIF for better search

capabilities of the GCMD.

• Change will include adding a group for polygon coordinates of a location.

• Polygon search will allow for more concise search compared to bounding box search.

GenaWareESRI’s ArcIMS

Software for future advanced GIS capabilities

• HTML and Java based clients that allows users to search, access, view and download geospatial data.

• Product is highly customizable which makes it a good solution for the GCMD.

• Application is OGC compliant.

• The product is provided at cost.

• HTML client similar to ESRI’s ArcIMS capable of displaying and querying geospatial data.

• Allows for OGC WMS capabilities.

• The product will need to be customized to the GCMD’s needs.

• The product is provided at cost.

Lucene Spatial Search

• Geospatial search application that uses Lucene and requires the use of Java applets in order to query the server.

• Spatial search uses search area technology, which is a location-based search technology.

• GCMD database is included in this DEMO version.

• Behind the scenes on how the spatial search works.

GIS Data and Services in the GCMD

• Access over 1600 metadata records describing GIS datasets.• Access shapefiles, Arc/Info export files, GeoTIFFs, Grass

files-directly from the metadata.• Access web mapping services, statistical applications, and

GIS software tools directly from the service metadata.• Future Web Map Server will allow access to GIS data over

distributed sources directly from the metadata.• Future direction of GIS in the directory.

Access and download GIS data from the Online_Resource into your GIS system.

Accessing GIS Data Through The GCMD

Access Web Map Server directly from the Related_URL.

Accessing GIS Services Through The GCMD