This data shows the outline of all buildings located in the
Wairarapa districts in the Wellington region as viewed from aerial photography capture in 2013. The processed data was added to preexisting outlines created for flood modelling purposes. Both datasets were used in the
Greater Wellington Regional Council topographic base map layers used on
Landinfo3 and the Greater Wellington external mapping webmap.
Building outlines were received from the western half of
the Wellington region but had not been created for the eastern half. Prior to
this data collection, the only sections of the Wairarapa urban areas that had
building outlines were Masterton CBD, Masterton Eastside and Westside which
had been created by George Harley to use in flood modelling exercises.
Building outlines in Featherston were derived by using the
Image Classification tool on 2013 Aerial Imagery from New Zealand Aerial
Surveys. Areas classified include vegetation, road & pavement, building and
bare earth. Building polygons were extracted and edited to show only the
outline of buildings.
The remainder of the outlines were created in ArcGIS Pro by
tracing the outline of the buildings as shown in the 2013 Aerial Imagery. The
outlines were initially created using the Right Angle Line tool unless the
building appeared irregular enough to warrant the use of the standard polygon drawing
tool.
The major urban settlements in the Wairarapa were digitised
as singular datasets. Once they were completed they were merged into a single
dataset. Outlines for well-known rural settlement were added onto the dataset
at this stage. The outlines of significant buildings were categorised and named
to match schema from the previous work.Outlines were generated for: Masterton, Carterton, Greytown, Featherston, Martinborough, Castlepoint, Riversdale, Flat Point, Mauriceville, Tinui, Lake Ferry, Cape Palliser, Mangatoetoe, Ngawi, South Featherston and Gladstone.Data was created from the 2013 Aerial imagery from New
Zealand Aerial Surveys. While all care was taken to ensure the data was
captured at an acceptable level of accuracy, visibility of building locations
was poor in some cases and features are likely to be misplaced under such
conditions. Update of data is needed upon the collection and
release of the 2016/2017 Aerial Imagery refly. Outlines will need to be
checked against the new imagery and modified to match any changes that have
occurred.
