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Wyświetlanie 1-2 z 2
Tytuł:
Kartodiagram anamorficzny Dorlinga
Dorling cartogram
Autorzy:
Faliszewska, A.
Korycka-Skorupa, J.
Powiązania:
https://bibliotekanauki.pl/articles/204307.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
mapa anamorficzna
kartodiagram anamorficzny Dorlinga
MapViewer
anamorphic map
Dorling cartogram
Opis:
W artykule przedstawiono niekonwencjonalne możliwości prezentacji kartograficznej - mapy anamorficzne. Szczegółowo omówiono kartodiagram anamorficzny Dorlinga - metodę dość powszechnie stosowaną w kartografii brytyjskiej, która nie doczekała się jeszcze szerszego opisu w polskiej literaturze kartograficznej. Po krótkim rysie historycznym omówiono założenia metody i sposoby konstrukcji takich kartodiagramów. Pokazano przykłady map opracowanych w programie MapViewer oraz przykłady zastosowania tej metody w Wielkiej Brytanii.
The world can be presented on maps in an unusual, unconventional way. The commonly known arrangement of continents or countries may be abandoned in order to expose changeability of a presented phenomenon. Such graphic presentations are referred to as anamorphic maps. Areas of presented units (e.g. countries) are proportional to statistical values, e.g. population, gross national product (fig. 2.). The article presents the assumptions and construction modes of one of anamorphic methods - Dorling cartogram. Examples of maps prepared in MapViewer and examples of application of this method in Great Britain are presented. Method of construction of Dorling cartogram is discussed on the example of maps published in A new social atlas of Britain [A1]. Fig. 6 presents two maps: traditional choropleth map showing the population density of Great Britain by electoral constituency in 1:10 000 000 (fig. 6A) and Dorling cartogram (fig. 6B). Constituencies are presented as circles with the area proportional to population. Location is preserved, but coastal line and borders are distorted. Preparation of such maps without a computer is almost impossible. Figures 8, 9 and 10 show Dorling cartograms of the population of Poland prepared in MapViewer 7 in 2002 and 2007. These maps are difficult to interpret, because readers are not used to seeing the world in unfamiliar shapes. Therefore when preparing them one should attempt to keep the shape and vicinity of particular units. It is advisable to help the users by showing ad-ministrative zones or by attaching a 'traditional' map. Skillful users of anamorphic maps can obtain new information from them.
Źródło:
Polski Przegląd Kartograficzny; 2010, T. 42, nr 2, 2; 113-127
0324-8321
Pojawia się w:
Polski Przegląd Kartograficzny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kartogram i kartodiagram jako przykład łączenia metod prezentacji kartograficznej
Choropleth map and diagram map as an example of combining cartographic presentation methods
Autorzy:
Dębowska, A.
Korycka-Skorupa, J.
Powiązania:
https://bibliotekanauki.pl/articles/204260.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
metody prezentacji kartograficznej
kartogram
kartodiagram
kartogram diagramiczny
mapa anamorficzna
charakter danych
odniesienie danych
cartographic presentation methods
choropleth map
diagram map
choropleth map basing on diagram
cartogram
character of data
Opis:
W artykule omówiono różne aspekty łączenia dwóch metod prezentacji - kartogramu i kartodiagramu na jednej mapie. Zwrócono uwagę na dopasowanie graficzne obu metod oraz na charakter i odniesienie przedstawianych w ten sposób danych. Pokazano przykłady takich połączeń, od najprostszych zastosowań po skomplikowane ujęcia anamorficzne.
Presentation of data on maps requires appropriate graphic methods to make the presented information logical and clear for map users. Depending on the range of information cartographers decide to use one, two or several presentation methods on a single map. A common combination is of a choropleth map with a diagram map. A choropleth map consists of area units (geometrical or administrative) designated with a color scale, a method for map background, while a diagram map consists of scaled diagrams appearing 'on top'. Because of this the two methods match and do not interfere graphically. Thus more data can be presented on a single map. It is important that data is logically selected and thematically linked, to create a new quality -communicate new information. Let us look at a combination of a choropleth map and a diagram map in relation to data selection. Considering possible combinations of two types of data (relative and absolute) with two methods of presentation, four types of combinations can be distinguished. (fig- 2). Type A is the most common and most correct according to cartographic methodology. Type B is also quite common. Type C seems incorrect because of a choropleth presentation of absolute data, which is contrary to theoretical recommendations of cartographic methodology. The last type is against the rules of cartographic methodology and is not used. When analyzing a combination of a choropleth map and a diagram map on a single map it is worth having a look not only at the character of data but also at what it relates to. In the case of a choropleth map data al-ways relates to area units. In diagrams data can relate to points, lines as well as area. Therefore the following types of graphic solutions can be determined (fig. 10). Type I is definitely the most common combination. Both methods relate to the same area units, which significantly facilitates map reading and interpretation. Many maps of Type II can be found in atlases, especially in maps thematically linked to population and industry, where data is related to points (diagrams) and area (choropleth). In such cases choropleth map is used to present various markers in relation to whole area unit: voivodship, countries, eta, while a diagram map presents e.g. cities or industrial centers. Type III is used when there is a need to show movement against the background of a choropleth map. Often the presented topic is so broad that it requires several graphic techniques simultaneously. They can be various types of diagrams (various shapes and colors), a complex choropleth map (two choropleth maps superimposed), various signatures and other methods of presentation (isolines, dots, ranges). Browsing through maps one can easily find ones with simultaneous use of several choropleth maps and diagram maps. There also exist some more complex combinations, which result in a single 'new' method of presentation, such as choropleth maps basing on a diagram or cartograms. Map authors combine the choropleth method with a diagram method to present a certain group of topics. This combination is often used to present socio-economic issues, because they require quantitative or ordering methods, of which a choropleth map and a diagram map are the most popular. While selecting data for cartographic presentation it should be remembered that using two or more sets of data on a single map has to be justified. Data shown on a single map has to be complimentary, self-explanatory and selected correctly from the point of cartographic methodology and graphic design. Any attempt to make an exhaustive and clear presentation of a particular problem on a map requires some graphic techniques involving a combination of cartographic methods. Clarity of such presentation depends on data selection, graphic design and perception of map user. Presented analysis does not conclude the topic of research, rather it opens the door towards a broader view of the potential of combining various cartographic methods.
Źródło:
Polski Przegląd Kartograficzny; 2010, T. 42, nr 4, 4; 305-320
0324-8321
Pojawia się w:
Polski Przegląd Kartograficzny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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