Auckland 0.075m Rural Aerial Photos (2022)

Auckland 0.075m Rural Aerial Photos (2022)

Toitū Te Whenua Land Information New Zealand

2022

Orthophotography within the Auckland Region captured in January and February 2022. Coverage encompasses selected rural areas north, west and south west of Auckland and parts of the Hauraki Gulf / Tīkapa Moana.

Imagery was captured for Auckland Council by AAM NZ Ltd, 6 Ossian St, Napier, New Zealand.

Data comprises:
• 5620 ortho-rectified RGB GeoTIFF images in NZTM projection, tiled into the LINZ Standard 1:1000 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 tile index layer for specific details, naming conventions, etc.

Imagery supplied as 7.5cm pixel resolution (0.075m GSD), 3-band (RGB) uncompressed GeoTIFF. The final spatial accuracy is ±0.15m at 95% confidence level in clear flat areas.

Index tiles for this dataset are available as layer [Auckland 0.075m Rural Aerial Photos Index Tiles (2022)](http://data.linz.govt.nz/layer/108476)

Metadata
- Photography: AAM, VissionMap A3- Edge 28, FL016509, 04.01.2022
- Photography: AAM, VissionMap A3- Edge 28, FL016510, 04.01.2022
- Photography: AAM, VissionMap A3- Edge 28, FL016594, 17.01.2022
- Photography: AAM, Vexcel UC XP-WA, FL016791, 15.02.2022
- Photography: AAM, Vexcel UC XP-WA, FL016796, 15.02.2022
- Trajectory: GeoNet, CORS, PRJ40044, As above
- Field Survey: WSP, RTK, PRJ40044, Jan 2022

Orthophoto Characteristics
- Format: GeoTIFF/TFW and JPG/JGW (75% compression)
- Spectral Resolution: RGB
- Tile Size: 480m x 720m (NZTopo50 1:1000 tiles)

Accuracy Specifications
- Field Survey: 5cm Measured Point, Basis of Estimation: Survey Methodology Used
- Orthophoto (Spatial): +/- 15cm Measure Point, Basis of Estimation: Project Design


Notes On Expected Accuracy
- Values shown represent 95% confidence level (2 sigma), in centimetres.
- “Derived points” are those interpolated from a terrain model.
- “Measured points” are those observed directly.

Data Validation – Orthophoto
This data has not been field tested for accuracy. Comparison of the orthophoto with existing control points which were also used in the photo orientation process and comparison to existing orthophotos resulted in a horizontal standard error (RMS) of 0.076 m, or 0.150 m at 95% confidence. Full proof of accuracy achieved requires comparison to independent test points.

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