Digital Data Capture and Automated Overlay Analysis for Basin Characteristic Calculation
Authors: Wiltshire, S. E.; Morris, D. G.; Beran, M. A.
Source: Cartographic Journal, The, Volume 23, Number 1, June 1986 , pp. 60-65(6)
Publisher: Maney Publishing
Abstract:An extensive flood study of European territories prompted the development of an automatic procedure for computing catchment average indices of climate and physiography. A variety of digitising schemes have been employed to collect map-based thematic data, which have been reduced to square gridded format and stored on data rasters registered with the UTM co-ordinate system. Catchment boundaries have been digitised and the catchment areas have been similarly gridded and stored. The resulting 'bit-maps' of catchments can be efficiently overlaid onto a grid of thematic data to yield a set of node values contained by the catchment boundaries which provides the basis for the calculation of basin characteristics.
Document Type: Research Article
Publication date: June 1986