Ōtorohanga 0.1m Urban Aerial Photos Index Tiles (2021)

Camera:
Imagery for this schedule was acquired using the Leica ADS100 line scanning camera with SH100 sensor head. The camera was fitted to a Leica PAV100 HP high performance gyro-stabilised mount.

Environmental Specification:
All imagery was captured without the presence of cloud or cloud shadow within the specified areas of interest. Where affected, all coastal, harbour, and tidal regions were captured during low tide periods,this being defined as the period 2 hours either side of low tide. Imagery covering coastal areas extends from the tide line during low tide periods out to 100 meters. Imagery of harbour areas extends out to 100 meters from the perimeter of the harbour.

Elevated Feature Displacement:
Areas were planned with a minimum of 40% side overlap and seamlines carefully positioned to minimize the effects of elevated feature displacement in urban areas.

Map Projection and Datum:
All spatial data for this project is supplied in the New Zealand Transverse Mercator (NZTM2000) projection in terms of the New Zealand Geodetic Datum 2000 (NZGD2000).

Image Processing:
The below methodology was employed by Hexagon Geosystems Services India for carrying out Orthophoto production. Leica Xpro software along with the QS2 distributed processing environment and inbuilt Hexagon Image Manager and Quality Manager2 were used during relevant phases of production.

Orthophoto Production:
Individual radiometric profiles were checked for each strip ensuring optimal results across the final ortho-mosaic. No complications were encountered during orthophoto generation, mosaicking and tiling. Various quality checks including accuracy, colour, contrast, sharpness, seamline positioning, refraction and generation artifacts were performed and found satisfactory on the final orthophoto tiles.