SDC: SURVEY-ACCURATE DIGITAL CADASTRE
Assignment of SDC Status
The SDC status is then assigned by testing the order against the relevant
Class of survey, or in the case of Survey
Conversion, against the corresponding area type (ie urban, peri-urban,
rural).
|
SDC Status
|
Assigned Coordinate Order
|
||||||
|
Order 6
|
Order 7I
|
Order 7ii
|
Order 7iiii
|
Order 8-10
|
|||
|
Node Purpose
|
Traverse
|
Yes
|
No
|
No
|
No
|
No
|
|
|
Boundary
|
Class I / Urban
|
n/a1
|
Yes
|
No
|
No
|
No
|
|
|
Class II / Peri-urban
|
n/a1
|
Yes
|
Yes
|
No
|
No
|
||
|
Class III / IV / Rural
|
n/a1
|
Yes
|
Yes
|
Yes
|
No
|
||
1 Note that in some cases, a boundary mark,
if it is of a type that is typically used for traverses (eg iron spike,
disc, mark set in concrete etc) can be assigned 6th order if the accuracy
of its definition meets the 6th order standard.
The SDC status is recorded against each coordinate. For NZGD2000 authoritative coordinates this is displayed against the node in Landonline. A parcel may have a mixture of SDC and non-SDC nodes on its boundaries. It is not useful to refer to an SDC parcel, as many parcels will only have some proportion of their nodes assigned SDC status.
SDC status can also be assigned to nodes on new surveys that are not in a Survey Conversion Area. The primary determinant of SDC status is their integration into a sufficient quality SDC network. The first survey in an area would have to be connected to at least two geodetic control points (all 5th Order and higher have SDC status). Subsequent surveys could then make use of that SDC data, in a similar manner to surveys within a Survey Conversion Area.
SDC: Survey-Accurate Digital Cadastre
Assignment of Coordinate Order and SDC Status
Percentage of
Nodes Achieving SDC Status
Application of SDC
Status