Geodetic Connection of Cadastral Surveys Workshop

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Geodetic Connection of Cadastral Surveys Workshop

• 18 May 2001

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Presentation OverviewKeith Bell, Surveyor
General of Victoria

• Industry Perspectives
• Official Release of Report
• Summary of Recommendations Priorities
• Recommendations
• Conclusion

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Industry PerspectivesMichael Loy, Immediate
Past PresidentAssociation of Consulting
Surveyors, VictoriaSteering Committee member
4
Official Release of ReportJohn Tulloch, Deputy
Surveyor General

• Endorsed by
• Land Victoria
• Surveyors Board of Victoria
• Steering Committee

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Summary ofRecommendations PrioritiesJohn
Tulloch, Deputy Surveyor General

• R1 P1 Geodetic Connection Requirements
• R2 P1 Benefits and Beneficiaries of Geodetic
  Connection
• R3 P1 GPS and Cadastral Surveying
• R4 P2 Geodetic Computing Competency
• R5 P2 Positional Accuracy of SMES Coordinates
• R6 P3 PM Sketch Plan Updating

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Summary of Recommendations Priorities cont...

• R7 P2 SMES Feedback Options
• R8 P2 SMES Survey Mark Metadata
• R9 P3 Survey Mark Compliance - Survey
  Coordination Act 1958
• R10 (a) P3 (b) P1 PSA Discontinuation and
  Control Network Density Strategy
• R11 P1 Analysis of Existing Geodetic Control and
  Funding of Infrastructure Upgrade

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Recommendations John Tulloch, Deputy Surveyor
General

• R1 P1 Geodetic Connection Requirements
• R2 P1 Benefits and Beneficiaries of Geodetic
  Connection
• R3 P1 GPS and Cadastral Surveying
• Practice Directive
• R4 P2 Geodetic Computing Competency
• Information Program
• Surveyors Board of Victoria

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Recommendation 4 - P2Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• It is recommended that Land Victoria initiate a
  program to supplement current information on
  geodetic computing with a brief, highly
  practical, document providing a pragmatic
  approach to calculation of geodetic coordinates
  as an integral part of other local plane
  computations.

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Recommendation 4 cont...

• HTTP//www.land.vic.gov.au/geodesy then go to GDA
  94

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Recommendation 4 cont...

• GDA Technical Manual on http//www.anzlic.org.au/i
  csm/gdatm/

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Recommendation 5 - P2Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• Coordinates in SMES should be allocated a more
  meaningful descriptor of minimum positional
  accuracy.
• ICSM is developing a new way
• it will say something like 10mm at 95 confidence
• Intend to put into SMES when developed

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Recommendation 5 cont...

• MGA coordinates should only be included in SMES
  if this descriptor, which can be assured to be
  correct, has been assigned to them. Other marks
  for which the quality cannot be assured to the
  new standard should only be provided as AMG
  coordinates.
• Relates to QA processes and Govt ability to
  demonstrate accuracy of coords
• Plan to have GDA coords for all marks
• Plan to continue to accept information from
  industry
• that may not have the data required to
  demonstrate a specific QA.
• The Surveyor who provided that data can

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Recommendation 5 cont...

• MGA should be the default coordinate system for
  cadastral surveys and display in SMES.
• Slightly inconsistent with previous part
  recommended continuation with AMG - (in part)
• Support, but low priority
• easily available now
• Probably part of SMES 3
• Timing of introduction probably related to
  introduction of MGA as default for cadastral
  surveys.

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Recommendation 5 cont...

• The symbology used to map the location of marks
  and the displayed precision of coordinates should
  clearly differentiate marks of different accuracy
  classifications.
• First indication of interest in a change
• Need to demonstrate a broad based support for
  this style
• If change is required - SMES 3

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Recommendation 7 - P2Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• It is recommended that Land Victoria continue to
  provide several options for feedback into SMES,
  such as fax, internet and email,
• Intend to continue to have those options
  available
• but also ensure that Surveyors' Reports are
  utilised.
• Support in principle
• Initial investigations show current reports not
  adequately structured
• Need to work with SG to restructure the surveyors
  reports if they are to be used

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Recommendation 7 cont...

• There should be an evolving emphasis on direct
  electronic entry in a form which minimises
  duplication of effort by surveyors and Land
  Victoria.
• Agreed, SPEAR is the first stage of that

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Recommendation 7 cont...

• Electronic lodgement of subdivisions (including
  plans) would seem inevitable for reasons of
  efficiency for both land Victoria and consulting
  surveyors and it is recommended that Land
  Victoria expedite the development of its ability
  to deal in this way and integrate the lodgement
  of related geodetic information.
• Agreed, Spear again
• BUT
• It is already possible to lodge material directly
  into SMES

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Recommendation 8 - P2Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• The SMES data model and interface should be
  extended to accommodate additional metadata to
  assist surveyors to resolve conflicting
  information by reference to more specific
  indicators of the original source of the
  information.
• Note some of this info already exists
• Would consider any consensus view on improvements

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Recommendation 8 cont...

• To minimise potential confusion between MGA and
  AMG coordinates during the transition to full
  adoption of MGA, the SMES interface should
  emphatically emphasise the reference system being
  displayed.
• Agreed
• Probably part of SMES 3

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afternoon tea
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Recommendations John Tulloch, Deputy Surveyor
General

• R6 P3 PM Sketch Plan Updating
• R9 P3 Survey Mark Compliance - Survey
  Coordination Act 1958
• Steering Committee Input
• Practice Directive

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Recommendation 10 (a) - P3Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• It is recommended that the Proclaimed Survey Area
  concept be discontinued
• SG responsibility

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Recommendation 10 (b) - P1Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• and an increased emphasis be placed on
  strategically maintaining or increasing density
  in the control network to match need.
• Current Strategic work uses DoI Land release
  program around Melbourne to set Priorities

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Recommendation 10 cont...
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Recommendation 10 cont...
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Recommendation 11 - P1Peter Ramm, Manager
Geodetic Infrastructure,Land Victoria

• It is recommended that Land Victoria commission a
  detailed analysis of the availability and
  adequacy of geodetic control, particularly in the
  Melbourne metropolitan area, which can be used to
  better inform the current strategic densification
  program.
• LV commenced this internally

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Recommendation 11 cont...

• It is further recommended that Land Victoria
  utilise funds generated by the Survey Reform
  Project to address any shortcomings in survey
  infrastructure identified in the analysis.
• The major barrier to
• improved maintenance or
• improved densification
• by government currently and in the past has been
  funding
• Rec accepted

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Conclusion Keith Bell, Surveyor General of
Victoria

• www.land.vic.gov.au/surveying