Vol18 No.4: 923-931
【Title】arcPycor: an open-source automated GIS tool to co-register elevation datasets
【Author】WANG Yu-zhe1,2*, YE Qing-hua3
【Addresses】1 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; 2 College of Geography and Environment, Shandong Normal University, Jinan 250358, China; 3 Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
【Corresponding author】WANG Yu-zhe
【Citation】Wang YZ, Ye QH (2021) arcPycor: an open-source automated GIS tool to co-register elevation datasets. Journal of Mountain Science 18(4). https://doi.org/10.1007/s11629-020-6305-y
【Abstract】Subtraction of elevation datasets (e.g. digital elevation models (DEMs) and non-continuous elevation points) acquired at different times is a useful method to monitor landform surface change. Due to heavy post-processing of these elevation datasets, multi-source errors are introduced into the resulting elevation data products. To improve the estimation of elevation change, co-registration of elevation datasets is a prerequisite. This paper presents an open-source automated GIS tool (arcPycor) for co-registering elevation datasets. arcPycor is coded in Python 2.7 and is run via ArcGIS for Desktop. The performances of arcPycor have been evaluated using a series of experiments. In benchmark tests, the resolved co-registration vectors of arcPycor are compared to the predefined shift vectors obtained by artificially misaligning the slave DEMs from the master elevation datasets. Results show that arcPycor is able to co-register DEMs with relative high accuracy and can well align slave DEMs to non-continuous elevation points, which indicates its robustness in co-registering of elevation datasets. arcPycor is also able to co-register multi-sourced DEMs of different resolutions in mountain areas.
【Keywords】Digital elevation models; DEM co-registration; ArcGIS; Elevation change; Terrain analysis