- Tytuł:
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Generalizacja danych topograficznych o szczegółowości 1:10 000 do skali 1:50 000
Generalization of topographic data from 1:10 000 into 1:50 000 - Autorzy:
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Iwaniak, A.
Ostrowski, W.
Paluszyński, W. - Powiązania:
- https://bibliotekanauki.pl/articles/204472.pdf
- Data publikacji:
- 2004
- Wydawca:
- Polskie Towarzystwo Geograficzne
- Tematy:
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kartografia
baza danych
mapa topograficzna
generalizacja kartograficzna
cartography
topographic map - Opis:
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W pierwszej części artykułu opisano i zilustrowano reguły generalizacji sieci drogowej i zabudowy przy opracowywaniu mapy topograficznej 1:50 000 na podstawie mapy 1: 10 000. W drugiej części artykułu zostanie zaprezentowana implementacja bazy wiedzy na podstawie zdefiniowanych reguł w środowisku programowym Dynagen oraz przykłady praktycznego wykorzystania tej implementacji do generalizacji Bazy Danych Topograficznych.
Due to the development of geographic information systems, in the developed countries more than 70% of decisions in public administrations are taken basing on spatial data. Particular regions have their own databases with various levels of detail, usually corresponding to standard topographic scales (1:10 000, 1:25 000, 1:50 000 etc.). The question is whether it would be possible to keep just one, detailed topographic database and generate cartographic presentations in different scales from it, using automatic generalization of spatial data. This problem is particularly vital in Poland, because the National Geographic Information System (KSIG), which is being implemented at the moment, consists of, among other units, a Topographic Database (BDT) with the level of detail corresponding to the map in 1:10 000 and a Level 2 Vector Map (VMAP 2) with the level of detail corresponding to the scale of 1:50 000. Since 2002 the Faculty of Environmental Engineering and Geodesy of Agricultural University of Wroclaw together with the Warsaw University Chair of Cartography have been working on a research project "Automatization of the process of generalization of topographic maps from the scale of 1:10 000 into 1:50 000". In the first stage of the research attempts were made to elaborate a system of automatic genera-lization of road network and buildings with the use of DynaGen software. In the first part of the article the rules of generalization of these two components are presented and illustrated. Criteria and rules for the choice of streets and lower road categories are established (criteria of density, length, functionality and spatial relations). Generalization of buildings presented in the scale of 1:10 000 can be conducted in two ways: either with symbols of separate buildings or by replacing them with a symbol of a built-up area. In the first case we are dealing with the following types of generalizations: generalization of qualitative features, substitution of a collective symbol for separate symbols, choice of buildings, replacement of building outlines with symbols, building simplification, combining and changing of building location. In the second case separate objects (buildings) are replaced with a collective symbol (built-up area), the shape of which is further simplified, extended and combined. - Źródło:
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Polski Przegląd Kartograficzny; 2004, T. 36, nr 3, 3; 177-186
0324-8321 - Pojawia się w:
- Polski Przegląd Kartograficzny
- Dostawca treści:
- Biblioteka Nauki
Artykuł