GEOSS StP Browse Scenario

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GEOSS StP Browse Scenario

• Doug Nebert
• 13Jun2011

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Support rapid discovery of data in support of
critical EO priorities

• The GEO Web Portal supports search by
  user-supplied terms that are used to form a query
  against full-text search of Clearinghouse CSW or
  local catalog
• Adding a browse capability would allow a novice
  user to navigate through a hierarchy to data by
  only clicking on progressively more specific
  terms and then the data/services related to them
• This presents an alternative to navigation or
  classification by SBA that is based on the medium
  in which the observation is made or targeted

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• Selected GCMD Topics and Terms are used for the
  two highest levels of the hierarchy.
• The specific observable parameters, as
  identified by the UIC research are provided by
  the EO vocabulary from various sources, including
  and extending GCMD
• Allow a user to select lowest-level terms from
  the hierarchy to find data.

Atmosphere u Climate Indicators u Cryosphere
u Human Dimensions u Land Surface u Oceans
u Solid Earth u Terrestrial Hydrosphere u
Atmospheric temperature u Atmospheric winds u
Surface wind direction (5) u Upper level winds
(3) u
Helper Software
Metadata
Get Data
View on Map
Metadata
Get Data
Helper Software
Metadata
Query Catalog
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Preconditions

• Selected vocabulary values are created by the
  ontology task team with context linkages to the
  GCMD Topic and Term. This is complete for the
  Table 13 priorities and within the week (?) will
  be complete for all SBA-defined critical EO
  priorities
• The EO vocabulary should include a cross-walk
  field to the SBA(s) that referenced each
  observation type. Vocabulary is encoded in a
  navigable XML format for use by the GWP
• Vocabulary values are already encoded into GCMD
  entries and will be solicited on input in the CSR
  for registration as well as through guidance to
  all remote catalogs for inclusion in remote
  metadata. GEOSS Data-CORE tagging could also be
  used to find Critical EOCORE
• GWP support for query formulation and result
  presentation with links to the data and helper
  apps

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UI Scenario Steps

• GWP presents the user with a hierarchical tree
  control showing only the highest level
  categories. (Selected GCMD Topics)
• User clicks on a category and the next level of
  hierarchy (GCMD Term) is exposed
• User selects the Earth Observation value from the
  integrated vocabulary with GCMD Variables from
  the GEO Vocabulary
• Other restrictions (location, date range,
  DataCORE) are selected in the browse form
• A search is sent to the Clearinghouse for data
  that meet the search criteria
• The results are returned from the browse request
  as titles and abstracts with links to show more
  metadata and select the data link or map view,
  and present accessible helper apps for the data
• If the item is an EO catalog that can be further
  searched, a search widget is presented to the
  user to refine an inventory search

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Discussion

• The GEO vocabulary, reconciled with the subject
  matter experts and GCMD taxonomic constructs
  provides a means to present EO information in a
  variety of ways (SBA, GCMD, medium of observation
• Browse is an appropriate technique to provide an
  exploration of information especially outside the
  immediate area of expertise whereas search
  requires more knowledge about the right text to
  use
• Support of Browse is a valuable upgrade to
  existing capability with minimal expense based on
  GCI infrastructure