Question
Data consideration for landform mapping
Answer :
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Landform mapping relies heavily on the quality, scale, and integration of geospatial data to accurately represent terrain characteristics and geomorphic processes. Elevation data form the core input, with Digital Elevation Models derived from sources such as LiDAR, photogrammetry, SRTM, and ALOS PALSAR. The spatial resolution and vertical accuracy of DEMs must match the mapping objective, as fine-scale landforms require high-resolution data, while regional studies can use coarser datasets. Preprocessing steps like sink filling, noise removal, and smoothing are essential to reduce artefacts that can distort slope, curvature,
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