Relationship between percieved greenery and width of visual fields

Abstract

Recent years, several researches had pointed out the perferable effects of the greenery on the impression of landscape. And many studies have resulted those effects to be depented on the amount of greeney in the field of vision. The ratios of greenery are fluctuating at the width of visual field. Then the effect of greenery was simply depended on the width of visual field. But referred studies had measured the ratios with the unvaried field of vision.
This study has aimed at the development of the appropriate visual field to measure the ratio of greenery as to the residential environment. The respondents had visited to the various types of roads and parks where people can usually contact with greenery, and responded the impression of the amount of greenery. And the ratios of greenery were measured by various focal distances' lens which provides various width of visual fields. The efficient width of field was examined to the impressions by the method of the regression equation. In the case of the focal concentrate type of landscape, the effective ratio was observed at the focal distance of 85mm lens which provides the width of about 20 degree field of vision. And at the nomal street where people view the landscape along the vista line, 50mm of the focal distance; about 40 degree field of vision, provided the effective result. In the case of the nomal point of park where people look around the landscape, 28mm; about 60 degree field of vision, provided the significant correlation. At the panoramic view of the park where people view along the skyline, about 60×20 degree of field of vision, gave effective results.
This shows that the impression of the amount of greenery is provided the ratio of greenery in the field of vision and the width of field depends on the type of landcape.