{'fraction_non_alphanumeric': 0.021775544388609715, 'fraction_numerical': 0.01340033500837521, 'mean_word_length': 4.805825242718447, '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}}
Fusion of airborne laser altimeter and RADARSAT data for DEM generation

This paper describes a geostatistical method for the generation of an improved accuracy digital elevation model (DEM) through the fusion of airborne laser altimeter data and a stereo-radargrammetric DEM. The results show that the accuracy of the DEM (canopy-top and ground-level) after data fusion is significantly better than that of the initial radargrammetric DEM. For the canopy-top DEM, the standard deviation of elevation errors falls from 21 m to 14 m or from 25 m to 11 m, depending on the validation source adopted.