Imagery Capture
Sensor - A3-28E
Focal Length - 300mm
Imagery Type - RGB
Acquisition Date(s) - 2014-04-20
Flying Height (above MSL) - Approx 3800m
Number of Images - 142904
Capture Methodology - Primary Runs - 51
Forward / Side Overlap (%) - 56 / 10
Orthosmosaic
A digital orthophoto is a raster image of remotely sensed data in which displacement in the image due to sensor orientation and terrain relief have been corrected (orthorectification). Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map and can be used as a backdrop layer in conjunction with other spatial information.
Spatial Resolution - 6 cm
Spatial Accuracy - 18cm
Map Projection - Web Mercator Auxiliary Sphere
Rectification Surface - Client supplied DTM data. Accuracy unknown
Tile Size / Grid - 1km x 1km
Limitations of Data
This dataset contains imagery which has been aero-triangulated, spatially adjusted and rectified using a digital ground surface model. The stated spatial accuracy of this product is relevant for features present at ground level only. Elevated structures (roof-tops, tree canopies, etc) will be affected by relief displacement and cannot be reliably measured from this product. Spatial accuracy is reduced in areas of dense vegetation.