Abstract
This study aims to make clear the principle for improvement of residential space in historically built up area, or the decision factor for it, by analysing the formation process of residential areas. In studying the residential area, the size of residential lot is important, and so is the shape of it, too. Especially the frontage of residential lot is important factor. So, the analyses in this study pay attention to the frontage of residential lot as the key factor. The conclusions are as follows, 1. In built-up residential areas, the frontage of residential lot and the size of it have a characteristic converging range in each blocks. 2. Especially, the converging of lot frontage is steeper than that of lot size. This indicates that the lot frontage is more important as the decision factor for residential lot in historically built-up areas. 3. The typical converging range of lot frontage is 5〜6 meters wide. And the lot frontage has been gradually converging to 5〜6 meters wide in subdividing process of it. 4. The degrees of converging of lot frontage vary with the historical bases in each blocks and they are associated with the present social stratum, too. 5. The subdividing of residential lot breaks out in relatively wider lot frontages-more than 10 meter or 12 meter wide. So, the prediction for subdividing of redidential lot can be set up on the present conditions.
