<![CDATA[Yongsu Sapari Village occupies a narrow coastal corridor on the northern flank of the Cycloops Mountains, where steep relief, developed lineaments, and limited flat land place roads, settlements, and cultivation activities close to potentially unstable rock slopes. This study integrates regional spatial information and site-scale rock-mass characterization to formulate landslide-mitigation-oriented land-use directions. The analysis combined thematic-map and satellite-image interpretation with Schmidt hammer testing at four points, an 8 m scanline containing eight discontinuities, Priest-Hudson-based RQD* estimation, RMRbasic classification under five groundwater scenarios, kinematic assessment of planar, wedge, and toppling failures, and Slope Mass Rating (SMR). Spatial evidence was synthesized using an evidence-based decision matrix rather than a fully quantitative weighted overlay because detailed slope raster, rainfall, groundwater, soil-depth, and complete landslide-inventory data were not available. Estimated UCS ranges from 40.69 to 114.71 MPa, with a mean of 72.09 MPa. RQD* reaches approximately 99.53%, while RMRbasic varies from 58.75 to 73.75, corresponding to fair-to-good rock-mass quality depending on groundwater conditions. Despite this relatively favorable RMRbasic, kinematic analysis of a 070/65 slope with an assumed friction angle of 30 degrees indicates possible planar failure on J1 (077/57), toppling on J2, J4, and J5, and a feasible-to-borderline wedge at the J5-J6 intersection. The controlling planar SMR is 31.25 under dry conditions and decreases to 16.25 under flowing-water conditions. Spatially, the two inventoried landslides occur along a road corridor at the foot of steep slopes and downslope of medium-to-high lineament-density zones. The findings show that land-use control should combine regional spatial context with local structural-geotechnical evidence, prioritize drainage and slope stabilization along critical road segments, retain forested upslope areas, and restrict new development toward upper slopes and source-runout pathways.]]>
