September 2012 Release Notes

This section contains September 2012 Release Notes.

Schema Changes

The attributes name and group_name are now in UTF-8 format. UTF-8 format has been introduced to fully support official names that contain macrons.

Feature classes which now include macronated data are:
pa_pnt
geographic_name
island_poly
lagoon_poly
lake_poly
railway_cl
residential_area_poly
spring_pnt
track_cl
waterfall_pnt

For systems not UTF-8 compliant name_ascii and grp_mcrnted are new attributes whose entries are the same as in name and group_name, but with any macronated vowels removed. Where macronated vowels have been removed, the value in the macronated attribute will be “Y”, and users can go to

http://www.linz.govt.nz/placenames/find-names/macrons/index.aspx

for a list of places or feature names within New Zealand that are gazetted and include macrons.

UTF-8 stands for Unicode Transformation Format-8. It is an octet (8-bit) lossless encoding of Unicode characters.

UTF-8 encodes each Unicode character as a variable number of 1 to 4 octets, where the number of octets depends on the integer value assigned to the Unicode character.

It is an efficient encoding of Unicode documents that use mostly US-ASCII characters because it represents each character in the range U+0000 through U+007F as a single octet. UTF-8 is the default encoding for XML.

Data Changes

For a list of Topo50 areas updated in this release, go to the Topo50 Update History page http://www.linz.govt.nz/topography/topo-maps/topo50/update-history

Contours have been split at the NZTopo50 map edges.

  • Contour features prior to this release were split at each NZMS260 map sheet edge (data.linz.govt.nz/#/layer/1579-nzms-260-map-sheets...)
  • Contours have now been split at each Topo50 map sheet edge. This accounts for the differing numbers of contour features between the previous release and this one; there are no new contours, just more splits in them.
  • In a future data release, contours will be joined at the NZMS260 map sheet edges, leaving them split only at the Topo50 map sheet edges

For more details about the nature of the data change, and whether or not a corresponding printed map has been released open the link to the spreadsheet in the Updates since 2003 section of the same page

Topographic Data Dictionary Changes

Version 5 has been released http://apps.linz.govt.nz/topo-data-dictionary/

The documentation now contains representation specifications for the symbols, polygon fills and line types used on LINZ Topographic Maps; and sample photographs of most objects.

The attributes name and group_name are now in UTF-8 format.
UTF-8 format has been introduced to fully support official names that contain macrons. For more information, see the Schema Change section above.

For a full list of changes made to this version of the Data Dictionary follow the link on this page to the Schedule of Changes.