Directional extraction model of "double eyelid" polygons based on ArcGIS Model Builder

Based on domestic and international research, starting with forest and grassland survey work, this study selected the areaperimeter ratio, the area-perimeter ratio of circular compactness, and perimeter difference as key indicators, and determined empirical thresholds. Using ArcGIS Model Builder, a directional extraction model for "double eyelid" patches was established, enabling batch extraction of "double eyelid" patches in specified administrative regions.