STUDY ON SHELTERBELT IN TOKACHI WHICH USED GEOGRAPHIC INFORMATION SYSTEM

在广阔的田野中自由地排列着的防护林，被称为“德立之景”。在农田保护的情况下也要非常有效，此外，在tokachi的脸失去了防护林，这可以说是一种损失，即使它从tokachi地区的居民身上拿走了，除了农民。最近，当地报纸从农用地观等角度对防护林的衰落提出了警告。我们也碰巧看到了，但自1988年以来，对防护林的案例调查没有完成，减少的实质也没有弄清楚。为此，利用地理信息系统，在1994年和1995年两次进行的防护林调查的基础上，在GIS上建立了德胜地区的防护林数据库。将德胜地区的防护林作为数据库作为GIS上的矢量数据，将1995年全区的防护林表示为可扩展、可缩小的数字地图。然后，根据该地图数据库的建立，对全县和乡镇的防护林布置情况的把握成为可能。研究发现，在调查前，人们认为所有城镇和村庄的防护林面积都在减少，但与几年前相比，随着城镇和村庄的不同，防护林面积有所增加，但有增加趋势的城镇和村庄确实存在。然后，它发现正在积极种植防护林的农民也根据面积而存在。这是一种通过向农民和管理人员提供和启发诉诸于这种景象的许多资料而期望防护林的继续停止的方法。

It is at the shelterbelt which stands freely in line in the vast field that it is famous as the scenery of the tokachi. To be very effective in case of this farm land conservation, too, and moreover that both the face at the tokachi loses the shelterbelt which it is possible to say are a loss even if it takes from the habitant in the tokachi district in addition to the person at the farmer. Recently, the local paper to warn the decline of the shelterbelt of from the viewpoint of the farm land view and so on. too, were happened to see, but since 1988, this case investigation at the shelterbelt wasn't done and the substance of the decrease, too, wasn't made clear. Therefore, it used a geographic information system and based on the shelterbelt investigation which was done in 1994 and in 1995, it built a shelterbelt data base in the tokachi district on the GIS.After making a shelterbelt in the tokachi district a data base as the vector data on the GIS, the shelterbelt in 1995 in the tokachi whole area could be expressed as the digital map which it is possible to expand and to reduce. Then, the grasp of a shelterbelt arrangement situation became possible according to the tokachi whole area and the towns and villages of the building of this map data base. It found that it was the shelterbelt to have thought that was decreased in all towns and villages as the estimate before the investigation, but that it increased by the minuteness than several years before depending on the towns and villages but that the towns and villages which tend to increase existed.And then, it found that the farmer who is planting a shelterbelt aggressively existed depending on the area, too. It is the one which expects that the continuation of the shelterbelt comes to a stop by posing and enlightening the many data which resort to such sight to the farmer and the administration.