Abstract: An important aspect of longwave radiation exchange within urban canopies is the degree to which the sky is obscured by surrounding buildings, a concept which may be described by the sky view-factor (?s). Hitherto, expressions ...

Abstract: No abstract available.

Abstract: A technique is described whereby sky view-factors may be determined using a video camera equipped with a fish-eye lens. The video image is digitized and then analyzed to distinguish between ?sky? and ?non-sky? pixels. ...