Hutt City 0.075m Urban Aerial Photos Index Tiles (2021)

Hutt City 0.075m Urban Aerial Photos Index Tiles (2021)

Toitū Te Whenua Land Information New Zealand

2021-01-13

Index Tiles ONLY, for actual orthophotos see layer [Hutt City 0.075m Urban Aerial Photos (2021)](http://data.linz.govt.nz/layer/106054)


Orthophotography of the urban areas within Hutt City, flown in January 2021.


Imagery was captured for the ‘Hutt City Council’ by AAM NZ Limited, 6 Ossian St, NAPIER, New Zealand.


Data comprises:

• 1,220 x 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 shape file 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 ±0.2m @ 90% confidence level.

Project
AAM was engaged by Hutt City Council to capture aerial photography for the urban area of Hutt City, totalling approximately 105 km2. The area of capture is located within the Wellington Region of the North Island.

Data Aquisition
Aerial photography was acquired from a fixed wing aircraft using a VisionMap A3 camera system on the 13th, 14th, 25th and 27th of January 2021. Data was captured with the lowest ground GSD set at 0.075 m. GPS base station support was sourced from GeoNet CORS operating in and around the Wellington Region. Ground control points were field surveyed by WSP.

Image Processing
Block adjustment and orthorectification of the A3 imagery was carried out within the VisionMap A3 software.

Other Capture Criteria
Imagery was captured with a minimum sun angle of 45 degrees and within 3 hours of low tide.

Accuracy
Imagery in this volume has been compared to control points obtained by field survey, using RTK GPS system, and assumed to be error-free. The test points were distributed across the area. The positional accuracy for this dataset is +/-0.2 m, with a 90% confidence in clear, open areas. The definition of the ground under trees may be less accurate.

-41.319350435 174.846839294 -41.142972831 175.002651447

https://data.linz.govt.nz/layer/106048-hutt-city-0075m-urban-aerial-photos-index-tiles-2021/

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