Description

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In 2016, AAM were engaged by the ACT Government to provide orthorectified imagery over the Northern section of Australian Capital Territory. Aerial Imagery was captured between the 26th March 2016 and the 1st April 2016. The imagery has a Ground Sample Distance (GSD) of 0.1m and has been referenced to MGA Zone 55 Grid.The total project area is approximately 1276 km2. The area contains a height range from approximately 400m to 2000m.The area covers a range of land use types, including: urban, alpine and rural crops and pasture, natural and plantation vegetation and inland water. REFERENCE SYSTEMS GDA94 MGA Zone 55 The data is GDA compliant.. SOURCE DATA Photography: A3 Source: AAM Description: A3 imagery Ref. No.: 26121A Photo Control: Source: AAM Description: RTK GPS Reference: 26121A Terrain Model: Source: AAM Description: LiDAR and Autocorrelation Reference: 26121A EXPECTED ACCURACY Project specifications and technical processes were designed to achieve data accuracies as follows: Horizontal data: <0.2m Basis of Estimation: Project Design Ground Control: <0.025m Basis of Estimation: Survey Methodology Used Notes On Expected Accuracy Values shown represent standard error (68% confidence level or 1 sigma), in metres Derived points are those interpolated from a terrain model. Measured points are those observed directly. Accuracy estimates of measured points refer to discrete point-mode observations. Accuracy estimates for terrain modeling refer to the terrain definition on clear ground. Ground definition in vegetated terrain may contain localised areas with systematic errors or outliers which fall outside this accuracy estimate DATA VALIDATION Orthophoto This data has not been field tested for accuracy. Comparison of the orthophoto with control points which were also used in the photo orientation process resulted in a horizontal standard error (RMS) of <0.2m or <2 pixels. Full proof of accuracy achieved requires comparison to independant test points. Creative Common By Attribution 4.0 (Australian Capital Territory), Please read Data Terms and Conditions statement before data use.

Dataset Attributes

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