Table 1: Image details in 2007–2011.

PeriodSatellite designationSpatial resolution (m)Quantity (scenic spots)

2011HJ-1A3065
2010HJ-1A3042
2009HJ-1A3034
2008CBERS-012086
2007CBERS-012063

HJ-1A satellite is the abbreviation of environmental and disaster monitoring and forecasting; CBERS-01 satellite was jointly invested in and developed by China and Brazil on October 14, 1999. Because HJ-1A images and CBERS-01 images are low-resolution areas, the results of shoreline extracted have small differences, but this does not affect this study.