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Another example of early thematic mapping comes from London physician John Snow. Though disease had been mapped thematically, Snow's cholera map in 1854 is the best-known example of using thematic maps for analysis. Essentially, his technique and methodology anticipated the principles of a geographic information system .
Maps are useful in presenting key facts within a geographical context and enabling a descriptive overview of a complex concept to be accessed easily and quickly. WikiProject Maps encourages the creation of free maps and their upload on Wikimedia Commons. On the project's pages can be found advice, tools, links to resources, and map conventions.
The appearance of a general references section is the same as those given above in the sections on short citations and parenthetical references. If both cited and uncited references exist, their distinction can be highlighted with separate section names, e.g., "References" and "General references".
For example, cartographers may simply omit military installations or remove features solely to enhance the clarity of the map. For example, a road map may not show railroads, smaller waterways, or other prominent non-road objects, and even if it does, it may show them less clearly (e.g. dashed or dotted lines/outlines) than the main roads.
General topology – also known as point-set topology, it deals with the basic set-theoretic definitions and constructions used in topology. It is the foundation for most of the other branches of topology. Geometric topology – study of manifolds and maps between them, particularly embeddings of one manifold into another.
[81] [16] An example of a form of qualitative cartography is a Chorochromatic map of nominal data, such as land cover or dominant language group in an area. [82] Another example is a deep map, or maps that combine geography and storytelling to produce a product with greater information than a two-dimensional image of places, names, and topography.
Pocket Ref is a general-purpose pocket-sized reference book composed of various tips, tables, maps, formulas, constants and conversions, compiled by Thomas J. Glover. [1] It is published by Sequoia Publishing, and is currently in its fourth edition at 864 pages in length, released in late 2010.
An example of a very short article covered by general references is provided by the linked revision of "low basis theorem". As an article matures to include more than a few sentences, inline citations are added to make it clear which material in the article can be verified by which source.