- Tytuł:
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Generalizacja danych topograficznych o szczegółowośći 1:10 000 do skali 1:50 000. Cz. 2
Generalization of topographic data from 1:10 000 into 1:50 000. Part 2 - Autorzy:
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Iwaniak, A.
Chybicka, I.
Ostrowski, W.
Paluszyński, W. - Powiązania:
- https://bibliotekanauki.pl/articles/204351.pdf
- Data publikacji:
- 2004
- Wydawca:
- Polskie Towarzystwo Geograficzne
- Tematy:
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mapa
mapa topograficzna
baza danych
generalizacja kartograficzna
map
topographic map
generalization - Opis:
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W pierwszej części artykułu omówiono znaczenie generalizacji w procesie budowy Krajowego Systemu Informacji Geograficznej oraz teoretyczne zasady generalizacji sieci dróg i zabudowy dla skali 1:50 000. W drugiej części opisano narzędzia informatyczne do automatyzacji procesu generalizacji oraz implementacje bazy wiedzy dotyczącej reguł generalizacji w środowisku programowym DynaGEN. Poprawność opracowanej bazy wiedzy zweryfikowano przez przeprowadzenie dwóch eksperymentów. Pierwszy eksperyment dotyczył generalizacji warstw tematycznych Bazy Danych Topograficznych (BDT) sieci transportowej i zabudowy w obrębie podwar-szawskiej miejscowości Łomianki. Drugi eksperyment polegał na generalizacji warstwy tematycznej sieci transportowej w okolicach Kowalewa Pomorskiego.
The most advanced software for generalization of digital data available on the market today is that by Laser Scan. The company participated in the AGENT The most advanced software project, which was described in the first part of the article. What resulted from the project was Clarity, a very advanced map generalization system. What differentiated Laser Scan from then contemporary software, was the fact that it accounted for the contextuality of generalization, i.e. the same objects can be generalized differently depending on the objects surrounding them. It was possible because of application of a unique object technology, where each object could be generalized in many ways depending on the context. The DynaGEN system by Intergraph is an alternative generalization software. It is less expensive and has significantly more practical applications. It uses the same generalization algorithms, but cannot do alternative operations. Therefore one can either generalize small areas in an interactive way, or generalize automatically with later manual corrections. Similarly to Laser Scan, it requires software configuration and also the construction of knowledge base. The second part of the article presents an implementation of the knowledge base containing the rules of generalization in DynaGEN environment. The accuracy of the arranged knowledge base had been verified by two experiments. The first one involved generalization of thematic levels of Topographic Database of the road network and buildings within the town of Łomianki near Warsaw. The second one consisted in generalization of the road network in the area of Kowalewo Pomorskie in Northern Poland. The knowledge base prepared in DynaGEN system contained two sets of rules. The first one included the rules applied automatically and which, in limited sequence, are used for the initial preparation of data. The second set contained the rules describing basic types of interactive generalization processes supervised by a cartographer, which were vital for the application sequence. The generalization of a road network consists of two stages. The first one involves an analysis and initial data processing. Its range includes a construction of a hierarchical model of a road network and the connection of road segments within the whole area. The second, main stage of the generalization of a road network involves selection and simplification of paved roads, dirt roads and paths. Generalization of built-up areas is performed in one step, without initial data processing. The prepared knowledge data describes the process of generalization of topographic data from 1:10000 into 1:50 000. It provides universal material which can be implemented in various software environments. - Źródło:
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Polski Przegląd Kartograficzny; 2004, T. 36, nr 4, 4; 266-273
0324-8321 - Pojawia się w:
- Polski Przegląd Kartograficzny
- Dostawca treści:
- Biblioteka Nauki