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LCDB v 3.3 Released

posted 24 Oct 2013, 15:37 by David Pairman   [ updated 13 Nov 2013, 14:49 ]

LCDB v3.3 has been released and is now available on the LRIS download portal at the address below.

This version contains the same time steps as v3.0, i.e. 1997/97, 2001/02 and 2008/09. It contains a variety of corrections and improvements that were incorporated before embarking on mapping from the 2012 data to produce LCDB v4. Improvements in this version include:

  • Recovery of hand-drawn line work where corners were unnecessarily rounded as part of the smoothing of stair-casing artifacts in an earlier processing step (see slide 14 in Digital Earth presentation).
  • A review of improvements to low producing grasslands in the South Island
  • Updates to croplands from Kyoto Land Use mapping
  • Corrections to the dating of land cover change mapped in LCDB v3.0
  • Edits arising from feedback

In this version we have included the "EditAuthority” and "EditDate" attributes to indicate the source of the change for both non-temporal and temporal changes mapped. A unique polygon identifier "LCDB_UID" has also been added to aid in the reporting of errors and tracking changes. 

We had hoped to release an online error reporting facility along with v3.3 but as it is still undergoing testing. We decided to not further delay the release of v3.3, and so we will release the error reporting facility separately next month. 

Update 14 November:

The summary pivot tables for change between the 2001 and 2008 time steps based on LCDB v3.3 are now available at These now contain tables for national coverage and by region.

There is also a change layer to track both non-temporal and temporal change between LCDB v3.0 and LCDB v3.3 available at As all three time steps are present in v3.3, this change layer, and the earlier change layer for v3.0 vs LCDB-2, are only relevant to users who need to reconcile analysis done on an earlier version with results from a newer version. You should only need the most recent LCDB version for studies of real temporal change.