Orthophotography for urban areas across Christchurch City totalling approximately 524 km2. Taken in the flying season (summer period) 2018-19. The area of capture is located in the Canterbury Region of the South Island.
Imagery was captured for Environmental Canterbury by Aerial Surveys Ltd, Unit A1, 8 Saturn Place, Albany,0632, New Zealand.
Data comprises: • 7984 ortho-rectified RGB GeoTIFF images in NZTM projection, tiled into the LINZ Standard 1:500 tile layout •Tile layout in NZTM projection containing relevant information.
The supplied imagery is in terms of New Zealand Transverse Mercator (NZTM) map projection. Please refer to the supplied tile layout for specific details, naming conventions, etc.
Imagery supplied as 7.5 cm pixel resolution (0.075m GSD), 3-band (RGB) uncompressed GeoTIFF. The final spatial accuracy is ±0.15 m @ 95% confidence level.
Index tiles for this dataset are available as layer [Christchurch 0.075m Urban Aerial Photos Index Tiles (2018-2019)](http://data.linz.govt.nz/layer/105045)
Released by LINZ under Creative Commons Attribution 4.0 International (CC BY 4.0) with: Following Attribution: "Sourced from the LINZ Data Service and licensed by Environment Canterbury for reuse under CC BY 4.0" For details see: https://www.linz.govt.nz/data/licensing-and-using-data/attributing-elevation-or-aerial-imagery-data
Environmental Specification Imagery captured with no cloud or cloud shadow within the area of interest. Coastal and harbour areas captured within two hours either side of low tide.
Urban Building Displacement Specification Urban 0.075 m GSD imagery – by flying with 60% forward overlap and with 35% sidelap (standard stereo coverage), 1 m building lean per 3 m height in the corners of the imagery. Christchurch CBD and University of Canterbury areas flown with 80% forward with 80% sidelap to achieve <0.37 m per 3 m height over areas with tall buildings.
Released by LINZ under Creative Commons Attribution 4.0 International (CC BY 4.0) with: Following Attribution: "Sourced from the LINZ Data Service and licensed for reuse under CC BY 4.0" For details see https://www.linz.govt.nz/data/licensing-and-using-data/attributing-linz-data