Integration of Agriculture, Culture, and Tourism in the Suburbs of Megacities: A Case Study of Huangpi District, Wuhan City, China

Against the backdrop of advancing rural revitalization and urban–rural integration, the deep integration of agriculture, culture, and tourism in megacity suburbs has become a critical pathway toward high-quality regional development. This study takes Huangpi District of Wuhan as an example to elucidate the mechanisms of such integration and propose corresponding optimization strategies. Using panel data from 2020–2023, we applied the entropy-weighted TOPSIS, coupling coordination degree, and grey relational analysis models, combined with POI data and kernel density estimation, to systematically evaluate the spatial patterns and integration level of agricultural, cultural, and tourism resources. The main findings include: (1) the coupling coordination degree of agriculture–culture–tourism integration increased from 0.49 to 0.75, progressing from near dysfunction to moderate coordination, with a robust trend; (2) cultural system indicators—particularly the scale of cultural enterprises—exert the strongest driving effect on integration, while agricultural productivity and tourism infrastructure provide essential support; (3) a spatial mismatch between resource-rich northern areas and service-concentrated southern zones constrains overall synergy efficiency. These findings offer a reference for similar regions, though limitations related to static POI data and methodological assumptions should be noted.