Brief description
Imagery CaptureSensor - PhaseOne IXU-RS1000 with 70mm Rodenstock reliance shutter (RS) lens. Serial Number - YC030001Focal Length - 69.8261mmImagery Type - RGBAcquisition Date(s) - North-South runs: 15th, 16th, 17th, 22nd & 23rd July 2019 Tie/coastal strips: 22nd & 23rd July 2019Flying Height (above MSL) - Approx 3000ft MSL for 6cm resolution, but variable due to terrain.Capture Methodology - Primary Runs - 95, Secondary/Tie Runs - 10Forward / Side Overlap (%) - 70 / 40OrthosmosaicA 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 cmSpatial Accuracy - <3 pixels @ 68% confidence (Sigma 1)*Spatial Accuracy Notes - Based on check against selected visible survey marker coordinates (Type ‘minimark’ and ‘STAND’ with CLASS A, B, C, D) downloaded from QLDSpatial website. Final imagery checked and accuracy verified against available cadastral data with sub 1m accuracy (B&D ENTRY CONTROLLED - 0.1M, 0.25M, 0.3M, 0.5M, 1MMap Projection - Web Mercator Auxiliary SphereRectification Surface - Utilised 1m Lidar DSM downloaded from https://elevation.fsdf.org.au/. The DSM was not manually edited and no 3D Breaklines were mapped. In areas of disturbance or obvious terrain change eg. Mines/quarries etc, a new DSM was generated via stereo photogrammetric techniques at ½ full image resolution. The photogrammetric DSM was filtered using automated building and vegetation filter algorithms to remove some (but not all) above ground features. The filtered DSM was then gaussian smoothed and resampled to 1m resolution to match the LIDAR DTM.Rectification Surface Accuracy Vertical - +/- 0.15m @ 67 % CI for client supplied LIDAR DTM, as per client metadata for dataset (not independently verified)Rectification Surface Accuracy Horizontal - +/- 0.3m @ 67 % CI, as per client metadata for dataset (not verified)Tile Size / Grid - 1km2Limitations of DataThis 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.Full description
ArcGIS Hub Dataset -ArcGIS GeoService -
