Digital Cadastral Database DCDB

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Digital Cadastral Database (DCDB)

• Cadastral Maps
• Examples and content
• Link to land titles
• Updating process
• DCDBs
• Background
• Factors for developing DCDB's
• Maintenance of DCDB's
• Upgrading process

Daniel Steudler, April 2001
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Example UK-Scotland
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Example Austria
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Example Switzerland
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Example Denmark
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Contents

• property boundaries
• building footprints
• other land use features (garden, roads, railway
  lines, forest, etc.)
• street addresses
• general administration boundaries

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Cadastre

• spatial textual component
• complexities
• high integrity with title component
• dynamic (daily transactions)
• SG also responsible for crown land
• Cadastre in Australia historically was
  established for land transactions, while in
  Europe, the first purpose was fiscal

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Updating of cadastral map

• subdivisions charted in LTO's on index map
• index maps mostly copied from approx. valuation
  maps

Spatial update of the cadastral map refers to
those processes that ensure that all new and
existing legal subdivions are recorded, ie. the
cadastral map is up-to-date. Specifically this
should include

• recording all new legal subdivisions
• ensuring map completeness

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DCDB Background

• Public sector
• Spatial Information Industry
• Spatial Data Infrastructure

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Factors for Developing DCDB's

• Technological Development Computerisation
• Technological Development Data Accuracy
• Business Need for National Digital Map Data

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Digital Cad. Map Example Switzerland
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Digital Cad. Map Example Austria
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Digital Cad. Map Example Canberra
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Digital Cad. Map Example Victoria
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Organisations involved in updating (Victoria)
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Upgrading of spatial component
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Evolving Standards
Standards
AV93
PN
VN
TN
HG
GR
1850
1912
1970
End 1970s
1985
1993
2000
Time
1930s
First Surveys
Renovations (Upgrading)
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Observations of Australian DCDB's

• Australia wide
• graphical cadastre
• high GIS focus
• state by state solution
• meta data
• incremental updates
• accuracy upgrade