Selwyn 0.075m Urban Aerial Photos (2020-2021)

**The 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.
A copy of the camera calibration certificate can be made available upon request.

**Capture Dates, Time and Sun Angle**
Dates, time and approximate sun angle for the imagery acquisition of each area are identified in the table below.

Area, Date, Time (UTC), Sun Angle
Lincoln, 03/12/2020, 02H15 - 03H00, ± 64°
Rolleston, 22/01/2021, 01H15 - 02H10, ± 66°
West Melton, 16/12/2020, 22H45 - 23H15, ± 54°
Prebbleton, 15/12/2020, 00H38 - 01H45, ± 69

**Flight Planning**
Careful consideration was given during flight planning to geographic location, terrain, topographical characteristics of the area, acquisition efficiency, final output resolution and meeting the various requested orthophoto quality specifications.

**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.

Rivers were captured during times of appropriate flow/stage height/rainfall restrictions as specified by the client. These criteria were set to avoid periods of high river flow (flooding), rather than to target abnormally low river flows.