Generalization of topographic spatial data in the object-oriented Clarity environment

Izabela Karsznia
University of Warsaw
Faculty of Geography and Regional Studies
Department od Cartography
Poland

Jacqueleen Joubran Abu Daoud
TECHNION – Israel Institute of Technology
Faculty of Civil and Environmental Engineering
Transportation and Geo-Information Engineering
Israel

Abstract

The aim of this work is an attempt at generalizing buildings and roads through development and implementation of generalization principles in the form of a knowledge base revealed in one of the most advanced programs supporting automatic generalization of spatial data – ‘Radius Clarity’ by 1Spatial. The research and the analysis are both aimed at building the knowledge base referred to the generalization of topographic (large) scales elaborations as well as their further verifying in the form of generalization experiments in ‘Radius Clarity’.
The scope of the presented research includes an attempt of buildings and roads generalization based on the data derived from topographic database. The experiments were prepared within cooperation between the Warsaw University and the Technical University of Haifa (‘TECHNION) with the support of 1Spatial company. These studies include generalization of buildings and roads which are part of Israeli spatial reference database from the detail level of 1:10,000 to 1:50,000. In order to verify the research, the generalization results were compared with the generalization model implemented in MATLAB environment.
The work prepared within the framework of this study will help to reduce subjectivity of the generalization process of spatial data. Development of automatic generalization framework is also very important in the process of improving map editing and their generalization.

Keywords:

cartographic generalization; topographic database; constrained-based modeling

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Załącznik do rozporządzenia Ministra Spraw Wewnętrznych i Administracji z dnia 17 listopada 2011 r. w sprawie bazy danych obiektów topograficznych oraz bazy danych obiektów ogólnogeograficznych, a także standardowych opracowań kartograficznych t. II.