Geospatial Data Access and Visualization

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Geospatial Data Access and Visualization

• Dave McIlhagga
• President
• DM Solutions Group Inc.

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DM Solutions Group

• Company History
• Involvement with OGC and CGDI

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Goals of OGC Data Visualization Access Standards

• Provide a language for interoperability
• Allow for the development of a distributed
  infrastructure
• Both goals are central to a successful CGDI

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Web Map Server Specification

• Provides an HTTP-based API for requesting
  graphical rendering of spatial data
• Allows for Map overlays to occur from remote map
  servers

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WMS Concept
Open GIS Consortium
Spatial connectivity
for a changing world.

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Styled Layer Descriptors

• Complementary specification to WMS that allows
  for client control of rendering
• Examples include point symbology, colours, line
  thickness, etc.

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Web Feature Server

• Allows for the sharing of raw vector data in the
  form of Geographic Markup Language (GML)
• Will become a critical component of the
  underlying CGDI infrastructure

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A Sample of Organizations Providing CGDI Content

• Centre For Topographic Information (CTI)
• National Forest Information System (NFIS)
• Canada Centre for Remote Sensing (CCRS)

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Applications using CGDI Visualization and Access
Services

• Make-A-Map DM Solutions Group
• Trailpaq Go for Green
• Gazetteer - CCRS

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Evolving Infrastructure to Support Data Access
Visualization

• Past year has seen important developments
• Availability of CTI Data
• Launch of inaugural Production Applications
• Pendent approval of WFS SLD specification
• Online availability of many new WMS servers

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Using and Contributing to CGDI Data Access and
Visualization

• Incorporate CGDI data through interoperable
  standards into applications
• Publish datasets by appropriate standards
• Note This can all be complementary to your
  existing infrastructure