Selection of the roads automatically by network structure in transportation generalization

Modelling and representing real world at several scales for the different purposes and requirements are the first goals of the cartography discipline. Therefore, generalization has been developed into one of the priority research topic for the cartographers and the researchers who involved in related disciplines. By means of the huge efforts of the researchers and the recent technology, hard working has been done and saticfactory results have been received about feasibility of the generalization automatic/semiautomatic in digital environment.Because of the high production costs, updating problems, increasing geographical information and map requirements of the people and the associations, the thought of the constructing a basic geographical database and producing other products from this database by generalization method has been adopted by many map production associations any more.In this study, the linear road data that must exist at 1:50.000 scaled map is tried to be selected automatically by using the data at 1:25.000 scale. Thus, saving time from production period and providing standardization in selection results is aimed.In application, 1:25.000 scaled cartographic vector data are used. This data is stored in environment of Microsoft Access Database (mdb.) as ESRI personal geodatabase. In selection process of the roads, junction points which not existing in database and positioned at the intersection points of the roads are created and selection is done by using these junction points.