{'fraction_non_alphanumeric': 0.01891891891891892, 'fraction_numerical': 0.0, 'mean_word_length': 5.073770491803279, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
An Evaluation of Digital Elevation Models for Upgrading New Zealand Land Resource Inventory Slope Data

Slope is a key environmental parameter which influences land use and erosion hazard. Digital elevation models (DEMs) are often used to map important topographic parameters such as slope. However, the quality of such maps depends on the quality of the DEM’s representation of the earth’s surface. In many cases errors in this representation are neither measured nor estimated. In this paper a real-time differential GPS is used to acquire ground truth data. This ground truth is compared with DEMs generated from contours. This analysis shows that three commonly used contour-based interpolation procedures all produce good quality DEMs.