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There are two main data fields. 'ACCURACY' identifies the basis on which the line was mapped; 'schematic' (where the landform feature is sharply defined in a topographic sense, and thus the line denotes the general presence of a feature, not an exact location) and 'approx-lidar' (the feature is identifiable topographically in lidar data, but it is not mapped in fine detail). 'TYPE' identifies the nature of the mapped feature; only two types of feature are mapped, 'edge high ground' (indicating the crest of a slope between higher ground and lower ground), and 'terrace edge' (the approximatelocation of a step between a higher and a lower river terrace). The line is positioned at about the lower side of the step.Thisdatasethasbeen compiled for presentation at a scale of 1:35,000, but the data were captured at more detailed scales. The landform feature lines were mapped on-screen at a scale of approximately 1:10,000, and are considered to be accurate to about +/- 30 m. The accompanying report is Barrell, D. J. A.; Van Dissen, R. J. 2014. Assessment of active fault ground deformation hazards associated with the Ashley Fault Zone, Loburn, North Canterbury, GNS Science Consultancy Report 2013/173 / Environment Canterbury Report No. R14/77(Figure 2). |