WORKING GROUP IV/3 REPORT AND REVIEW OF PROGRESS IN MAP AND DATABASE REVISION

摘要

The Chairman presents his report on Working Group activity during the session 1992-96, including an overview of papers submitted for this Congress as well as relevant reports on practice and research published earlier in the Session. He outlines the present status of map and database revision: the inevitable move from analytical to digital techniques for routine production work has only just begun, with the adoption of digital mono-plotting by several respected organisations. Meanwhile research efforts continue towards the automation of the processes of change detection and feature extraction. However, apart perhaps from small scale map revision in remote or forested areas, practical realisations are still awaited. In the course of these discussions the author points towards how practice may develop over the coming four years, under the influence of possible technical changes such as high resolution digital imagery from commercial satellites, airborne digital cameras, orthophotos with all features correctly positioned (not just those at ground level), and the evolution of pen computers into digital photogrammetric workstations in the hands of field surveyors. In view of the overlap of interest between many of the Commissions and Working Groups of ISPRS, it is certain that much material relevant to map and database revision will be found in the sessions and archives of other Groups; it is hoped that this will lead to pressure from participants for a more convenient ISPRS structure in the future.