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LandXML FAQs

Does Landonline allow data to be extracted in Old Cadastral Datum (OCD) coordinates?

Landonline does not allow data to be extracted in Old Cadastral Datum (OCD) coordinates nor can Landonline import LandXML files with an OCD coordinate system.

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What Survey Software checks should I make before saving to LandXML?

Before saving the LandXML file in your survey software, and before importing the LandXML file into Landonline, you need to ensure that:

  • The parcel areas have been rounded to the nearest 1m 2 (0.0001 Ha). XML allows the area of each parcel to display to less than 1m2 while LINZ only requires areas to the nearest 1m2 (0.0001Ha).
  • All the arc information is correct especially the arc length. Some survey software calculates the arc length, which may be different by 0.01m to the arc length in Landonline.
  • Check that the LandXML attribute 'lengthAdoptionFactor' which may just be called 'Length Correction' in survey software has a value of '1' and is shown lengthAdoptionFactor="1" in the LandXML file and not shown as "0". If it is shown as "0" it will cause a C42A rule failure.

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What about editing in Landonline after a LandXML file has been imported?

All imported LandXML files still require edits to be made in Landonline to the e-survey once imported.  The amount of editing will depend on the:

  • Survey software used to create the LandXML file.
  • Pre-validation report failures.
  • Survey purpose of the e-survey.

Ensure all the following screens have been opened and checked for completeness:

  • Survey Header.
  • Spatial Window.
  • Mark List.
  • Mark Details.
  • Traverse Boundary Capture.
  • Parcel List.
  • Parcel Details.

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How do I name new Marks in Landonline?

Mark names in Landonline for new marks should be made up of three components:

  • Mark type abbreviation e.g. PEG, IT, LP, UNMK.
  • Mark number e.g. 1, 2, (preferably alpha numeric instead of roman).
  • Mark plan reference e.g. DP 523456.

The LandXML schema requires mark names to be unique even if Landonline does not have unique mark names.  Landonline cannot import an XML file with non-unique mark names.  Therefore in your survey software, the marks should be made unique.  Refer to the Cadastral Survey Guidelines for e-survey

Ensure new marks get updated with the survey reference of the e-survey.

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Do I need to include Bearing corrections?

Ensure all Referenced Surveys have Bearing Corrections entered against them even if the bearing correction is 0.00000.

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What about Parcel mappings?

Some LandXML Parcel Classes do not map the Parcel Intent and Topology Class.  The LandXML schema does not cater for every field in Landonline nor does it cater for every field to be mapped.  Where there is more than one import value for a schema value, Landonline will not map it.  This requires the user to make a conscious choice in Landonline.

The parcel details will need to be entered in Landonline and the observations associated to the parcel will need to have the Observation Layers updated in the Traverse Boundary Capture screen. The updated parcels will require linking to the spatial representation.

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What happens if LandXML files fail to import due to parcel topology problems?

If there are parcel topology errors Landonline cannot import the LandXML file. To identify if the parcel topology problems are caused by the new survey or the underlying Landonline data the survey must be visible in Landonline.

To get the survey into Landonline, unlink the marks in your survey software and create a new LandXML file. Import this file into Landonline. If the problem is with the Landonline data, you should enter the exception process and request LINZ to amend Landonline.

When the data is corrected you have two options:

  • Continue in Landonline and re-link the marks in Landonline, or
  • Extract the corrected Landonline data and read this into your survey software, unlink and re-link the marks and create a new LandXML file, then import this file into Landonline.

It is preferable that any anomalies in the Landonline data are identified and corrected before the LandXML file is created and imported into Landonline.