Understanding land-use change is imperative in the management of Indonesian coastal ecosystems with numerous environmental impacts generated from land-use conversion. To assess these impacts in holistic perspective, we use three sources of data, land cover change, policy maps, and interviews, to triangulate the main issues. Combining these sources, we analyze land-use changes in the past based on perception interviews and secondary data from the government spatial plan policy map and observable land-cover. In Tanjung Batu and Derawan Island we found that local populations were more aware of the changes related to infrastructure development, but that there are discrepancies between assigned and actual land-use, illustrating the value of a triangulated framework.

了解土地利用变化对于印度尼西亚沿海生态系统的管理至关重要，因为土地利用转换产生了许多环境影响。为了从整体的角度评估这些影响，我们使用三个数据来源，土地覆盖变化、政策地图和访谈，对主要问题进行三角分析。结合这些来源，我们基于感知访谈和来自政府空间规划政策地图和可观察土地覆盖的二手数据分析了过去的土地利用变化。在丹绒峇都和德拉湾岛，我们发现当地人更了解与基础设施发展相关的变化，但分配的土地用途和实际土地用途之间存在差异，这说明了三角框架的价值。