Geographical information studies toward forecast of suburban forest change

在“人类与环境共生”的概念具有重大意义的时候，保护郊区森林(即与发达地区相邻或接近发达地区的森林)是一个备受关注的话题。自古以来，郊区的森林就是人们收集柴火和培育树木的地方。因此，郊区森林的植被只有部分是自然的，并随着周围人类活动形式的变化而继续变化。因此，准确预测郊区森林将如何变化是如何保护它们的辩论中的一个重要因素。在这项研究中，利用激光雷达遥感、多光谱扫描、数字摄影测量分析、航空照片解译和实地调查对郊区森林进行了分析。使用这些技术收集的数据被汇编在地理信息系统上，以预测森林未来的变化。对过去50年拍摄的航空照片进行了分析，以阐明这一时期森林的变化。具体地说，使用数字摄影测量工作站测量的精确数字高程模型(DEM)的比较使估计森林高度的生长成为可能。今后可能将这类结果转换为森林合并的二氧化碳估算量，这对于讨论全球环境问题应该非常重要。

At a time when the concept of "human and environmental symbiosis" has taken on much significance, protection of suburban forests (i.e. forests adjacent to or near developed areas) is a topic that has drawn much attention. Suburban forests have, since ancient times, been places where people have gathered firewood and cultured trees. As a result, the vegetation of suburban forests is only partially natural and continues to change as the forms of human activity in and around them changes. Accurate forecasts of how suburban forests will change are, therefore, an important element in the debate over how to protect them.In this study, a suburban forest was analyzed with laser radar sensing, multi-spectrum scanning, digital photogrammetry analysis, aerial photograph interpretation, and a field survey. Data gathered using these techniques were compiled on a GIS to forecast future changes in the forest. Aerial photographs taken over the past 50 years were analyzed to illuminate changes in the forest over that period. Specifically, comparisons of precise Digital Elevation Models (DEMs) measured by using digital photogrammetry workstations made it possible to estimate growth in forest height. The possible future conversion of such results to estimates of amounts of carbon dioxide consolidated by forests should be very significant for discussions of global environmental problems.