Spatial heterogeneity of keyhole imagery coverage in China and imagery dataset cost estimation.

ABSTRACT: Keyhole imagery documented global surface from 1960 to 1980s and has contributed to earth surface change research, while evaluation of its' coverage spatial heterogeneity is rare. In this work the boundary vectors with attributes of all freely Keyhole images within China were obtained from USGS website to automatically investigate the spatial coverage characteristics using the ArcPy library in Python. Images were categorized into meter-level (C1), five-meter-level (C2), and ten-meter-level (C3). The resolution and spatial coverage distribution of Keyhole imagery at national and provincial levels were investigated using geostatistical and statistical methods. Combining coverage area of free imagery and the costs of non-free imagery, the cost of Keyhole datasets construction was calculated.

SUBMITTER: Li H 

PROVIDER: S-EPMC11695812 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature