Construction of a forest database using GIS to assist rural planning in Tohoku region

本研究的目的是开发一个支持农村规划的森林地理信息系统数据库。这项研究的地区是山形县草木町。该镇位于日本最大的稻米产区之一的首奈平原，其主要成果如下：1.苦岛的土地总面积约为8000公顷。大约45%的土地面积被森林覆盖。水田占25%，旱地占8%。国家森林占森林总面积的44%。利用Landsat TM影像对松奈平原的土地覆盖变化进行了调查。结果表明，近13年来，稻田和建成区地表温度呈下降趋势。现有的私有森林和国家森林数据库之间存在差异。它们给我们将这两个数据库集成到森林地理信息系统中带来了各种问题。在更新林业规划地图时经常会出现错误，但我们使用地理信息系统来减少错误。利用森林地理信息系统数据库，可以对雪害危险森林面积进行估算，并可以方便地为森林经营规划小组作业。

The objective of this study is to develop a forest GIS database system assisting rural planning. The area of this research is Kushibiki-machi, Yamagata Prefecture. This town is located in Shonai plain, which is one of the largest rice-producing areas in Japan.The results may be summarized as follows :1. Kushibiki's total land area is about 8,000ha. About 45% of the land area is covered with forest. Paddy field accounts for 25% and upland field for 8%. National forests occupy 44 % of the total forest area.2. The land cover change was investigated by using Landsat TM imagery in Shonai plain. The results showed that the surface temperatures of paddy field and built-up area fell for the last 13 years.3. There are differences between the existing databases for private forest and national forest. They bring about various problems when we integrate the two databases into the forest GIS system.4. Errors were often made in updating maps for forestry plan, but we reduce mistake by using GIS.5. We can estimate a danger forest area of snow damage, and we can easily plan group work for forest management by using forest GIS database.