map

a diagrammatic representation of the earth's surface (or part of it) (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function) make a map of

show or establish the features of details of

"map the surface of Venus" explore or survey for the purpose of making a map

"We haven't even begun to map the many galaxies that we know exist" locate within a specific region of a chromosome in relation to known DNA or gene sequences

"map the genes" plan, delineate, or arrange in detail

"map one's future" depict as if on a map

"sorrow was mapped on the mother's face" to establish a mapping (of mathematical elements or sets)

otheruses ]]A map is a simplified depiction of a space, a navigational aid which highlights relations between objects within that space. Most usually a map is a 2D geometric modeltwo-dimensional, geometrically accurate representation of a three-dimensional space. The science and art of map-making is cartography.

Introduction - Map-making dates back to the Stone Age and appears to predate written language by several millennia. One of the oldest surviving maps is painted on a wall of the Catal Huyuk settlement in south-central Anatolia (now Turkey); it dates from about 6200 BC. !#ReferencesHarvey - 2000, p. !142English as "On Exactitude in Science".Road maps are perhaps the most widely used maps today, and form a subset of navigational maps, which also include aeronautical and Nautical chartnautical charts, railroad network maps, and hiking and bicycling maps. Community maps, including GreenMap.org - GreenMaps, are growing in importance. In terms of quantity, the largest number of drawn map sheets is probably made up by local surveys, carried out by municipalities, utilities, tax assessors, emergency services providers, and other local agencies. Many national surveying projects have been carried out by the military, such as the United KingdomBritish Ordnance Survey (now a civilian government agency internationally renowned for its comprehensively detailed work).

Orientation of maps - '', about 1300, Hereford Cathedral, England. A classic "T-O" map with Jerusalem at centre, east toward the top, Europe the bottom left and Africa on the right.]]Conventionally, on most geometrically accurate maps text is upright when the map is oriented with the north up, hence north is identified with the top of a sheet. Maps that don't put north at the top:#Polar mapPolar maps#Dymaxion mapDymaxion maps# Some rectangular maps produced in Australia show the south pole at the top. To someone used to seeing the map the other way around, this map may appear to be "upside down". These are primarily intended as novelty and tourist maps. # Other modern maps put south on top, generally either out of a sense of playful confusion or to make a political statement about the North-South divide.# Old maps of Edo show the KokyoJapanese imperial palace as the "top," but also at the centre, of the map. Labels on the map are oriented in such a way that you cannot read them properly unless you put the imperial palace above your head.# Medieval European T and O maps such as the Hereford Mappa Mundi were centred on Jerusalem, with East at the top.If a person is located at an identifiable point within the area of such a map, then the map can be oriented in such a way that every point on the map lies in the same direction as the corresponding point in reality. The practice of navigating in this way is orienteering.For a vertically positioned map representing a horizontal area true orientation is not possible, of course, but it is sometimes approximated by putting the forward direction up.Occasionally a map is on a ceiling, correctly showing directions; in that case, looking up we have in clockwise direction forward, left, backward, and right. If the map is prepared on a table, to be attached to the ceiling, then on the table it is a mirror image of a normal map.

Scale and accuracy - Many but not all maps are drawn to a Scale (measurement)scale, allowing the reader to infer the actual sizes of, and distances between, depicted objects. A larger scale shows more detail, thus requiring a larger map to show the same area. For example, maps designed for the hiker are often scaled at the ratio 1:24,000, meaning that 1 of any unit of measurement on the map corresponds to 24,000 of that same unit in reality; while maps designed for the motorist are often scaled at 1:250,000. Maps which use some quality other than physical area to determine relative size are called Cartogramcartograms.A famous example of a map without scale is the Tube_mapLondon Underground map, which best fulfils its purpose by being less physically accurate and more visually communicative to the hurried glance of the commuter. This is not a cartogram (since there is no consistent measure of distance) but a Topologytopological map that also depicts approximate bearings. The simple maps shown on some directional road signroad signs are further examples of this kind.In fact, most commercial navigational maps, such as road maps and town plans, sacrifice an amount of accuracy in scale to deliver a greater visual usefulness to its user, for example by exaggerating the width of roads. With the end-user similarly in mind, cartographers will censor the content of the space depicted by a map in order provide a useful tool to that user.For example, a road map may or may not show Railroadrailroads, and if it does, it may show them less clearly than Highwayhighways.

World maps and projections - mainWorld map )]]Maps of the world or large areas are often either 'political' or 'physical'. The most important purpose of the political map is to show territorial borders; the purpose of the physical is to show features of geography such as mountains, soil type or land use. Geological maps show not only the physical surface, but characteristics of the underlying rock, Geologic faultfault lines, and subsurface structures. Maps that depict the surface of the Earth also use a map projectionprojection, a way of translating the three-dimensional real surface of the geoid to a two-dimensional picture. Perhaps the best-known world-map projection is the Mercator Projection, originally designed as a form of nautical chart.Airplane pilots use aeronautical charts based on a Lambert conformal conic projection, in which a cone is laid over the section of the earth to be mapped. The cone intersects the sphere (the earth) at one or two parallels which are chosen as standard lines. This allows the pilots to plot a great-circle route approximation on a flat, two-dimensional chart.

Electronic maps - digital raster graphic.]]From the last quarter of the 20th century, the indispensable tool of the cartographer has been the computer. Much of cartography, especially at the data-gathering survey level, has been subsumed by geographic information systemGeographic Information Systems (GIS). Even when GIS is not involved, most cartographers now use a variety of computer graphics programs to generate new maps. Interactive, computerised maps are commercially available, allowing users to ''zoom in'' or ''zoom out'' (respectively meaning to increase or decrease the scale), sometimes by replacing one map with another of different scale, centred where possible on the same point. In-car Satellite navigationsatellite navigation systems are computerised maps with route-planning and advice facilities which monitor by satellite the position of the user.From the computer scientist's standpoint, zooming in entails one or a combination of:#replacing the map by a more detailed one#enlarging the same map without enlarging the pixels, hence show more detail#enlarging the same map with the pixels enlarged (replaced by rectangles of pixels); no additional detail is shown, but, depending on the quality of one's vision, possibly more detail can be seen; if a computer display does not show adjacent pixels really separate, but overlapping instead (this does not apply for an Liquid crystal displayLCD, but may apply for a cathode ray tube), then replacing a pixel by a rectangle of pixels does show more detail. A variation of this method is that interpolation is performed.For example:

Typically (2) applies to a Portable Document Format (PDF) file. The increase in detail is, of course, limited to the information contained in the file: enlargement of a curve may eventually result in a series of standard geometric figures such as straight lines or arcs of circles.

(2) may apply to text and (3) to the outline of a map feature such as a forest or building.

(1) may apply to the text (displaying labels for more features), while (2) applies to the rest of the image. Text is not necessarily enlarged when zooming in. Similarly, a road represented by a double line may or may not become wider when one zooms in.

The map may also have layers which are partly raster graphics and partly vector graphics. For a single raster graphics image (2) applies until the pixels in the image file correspond to the pixels of the display, thereafter (3) applies.The word "map" has also been used to describe places within video games, such as SOCOM II: U.S. Navy SEALs and Counter-Strike, that players choose to compete on, as a synonym for !Level_(computer_and_video_game s)level.See also Webpage#GraphicsWebpage (Graphics), Portable Document Format#LayersPDF (Layers), Mapquest, or Yahoo! Maps.

References -

David Buisseret, ed., ''Monarchs, Ministers and Maps: The Emergence of Cartography as a Tool of Government in Early Modern Europe.'' Chicago: University of Chicago Press, 1992, ISBN - 0226079872

Miles Harvey, ''The Island of Lost Maps: A True Story of Cartographic Crime''. New York : Random House, 2000. ISBN - 0767908260, cited above; also ISBN 0375501517

Mark Monmonier, ''How to Lie with Maps'', ISBN - 0226534219

O'Connor, J.J. and E.F. Robertson, ''www-gap.dcs.st-and.ac.uk - The History of Cartography''. Scotland : St. Andrews University, 2002. !http://www-gap.d cs.st-and.ac.uk/~history/HistT opics/Cartography.html?

See also -

Geography

Atlas (cartography)

World map

Topographic map

Geologic map

Navigation map

Cartogram

Plat

Floorplan

George BradshawBradshaws, including maps of the British railway network, first published in 1839

Template_talk:Mapquest - Linking Mapquest maps to articles.

Sanborn Maps - detailed American fire insurance maps

Map design

Ordnance Survey

Google Maps

Japanese map symbols

Planform

Plan view

External links - commonscatmaps

Microsoft: MSN maps.msn.com

* world atlas (the whole world on the same scale: 4 km = 49 pixels, 82 m / pixel)

* North America (Canada, US, Mexico), US to street level, Mexico only some parts to street level (for the other parts street level scale is available, but it shows blank maps with e.g. only one dot to represent a village)

* Western Europe to street level, see maps.msn.com - map of area covered

* Australia

* Brazil

ab-map.com - US Map: ABMap - Interactive World Map and detailed united states street map

fax.libs.uga.edu - Historical Maps from the Hargrett Library Collection (University of Georgia) --browse over 1000 maps from as early as 1544-- DjVu format; requires free plugin or JAVA

texashistory.unt.edu - Historical Maps from the Portal to Texas History

atlases with maps by country:

* populationdata.net - PopulationData.net

* cia.gov The World Factbook

** the same maps but with a faster, cleaner directory: lib.utexas.edu

* go.hrw.com - Holt, Rinehart and Winston

* infoplease.com - Infoplease

lib.utexas.edu - UT scanned collection - University of Texas at Austin (also at us.aminet.net and wuarchive.wustl.edu - ; images.google.com - thumbnails at Google)

* lib.utexas.edu - list of links including those to external sites

aquarius.geomar.de - Online Map Creation: Webinterface to GMT mapping package

* new version: planiglobe.com - Planiglobe

mapzones.com - MapZones Map of all countries

multimap.com - Multimap world atlas: on UK, US, Canada, Australia and Western Europe more detailed than the rest of the world; the list of scales to select from is location-dependent - also provides geographic coordinates of a location selected from a map.

MapQuest mapquest.com: on US, Canada and Western Europe more detailed than the rest of the world - the list of scales to select from is not location-dependent: for part of the world several zoom level links lead to an image with just the message "No Data Available".

welt-atlas.de - Atlas of the World A world atlas with hundreds of very detailed and elaborate maps from every part of the world

maps.yahoo.com - Yahoo Maps: on US, Canada, Germany, France, Spain, Italy

de.maps.yahoo.com - Yahoo Germany: on France, UK, Germany, Italy, Spain, Portugal, Austria, Switzerland, Benelux

landkarte-online.net - Maps of the World (ger.)

krak.dk - krak.dk: Interactive map of Denmark

routenplaner24.de - Routenplaner24 Street Maps and Route Planner in Germany

mapsouthpacific.com - Map South Pacific: on Polynesia, Melanesia, Micronesia

freeworldmaps.net - World and Continent Maps

streetmaps.de - Street Maps in Switzerland, Austria and Germany

!plasma.nationalgeographic.com< /a> - MapMachine (National Geographic/ESRI)

nationalatlas.gov - National Atlas of the United States

* nationalatlas.gov - US state maps

citoplan.nl - Example of legend (Cito-Plan city maps)

!http://www.geocities.com/marco schmidt.geo/geo-data.html

? nationalmap.usgs.gov - USGS National Map

web-routenplaner.de - Free Maps and Route Planner on Europe

outdoormountain.com - Maps of OutdoorMountain

sunysb.edu - Online Map Catalogs in North America and Europe Lists some good places to search for online maps

oddens.geog.uu.nl - The fascinating world of maps and mapping Lists all kinds of maps

maphistory.info - Map collections Intorductory page to help navigate the online map resources

uidaho.edu - A listing of over 5000 websites describing holdings of manuscripts, archives, rare books, historical photographs, and other primary sources for the research scholar

guiageo.com - Brazilian and World Maps vector graphicsVector Portable Document FormatPDF maps of Brazilian states

centamap.com - Hong Kong Maps CentaMap

freeroute.de - FreeRoute Germany

cgrer.uiowa.edu - Links to on-line atlases

links4maps.com - Link Directory for Maps Link directory of map libraries and societies, antique maps and world, regional, travel, historical and other map resources.

matton.com - Royalty Free Maps Royalty Free Vector and Bitmap Maps, available in Illustrator format.

mcwetboy.net - Map Room - a weblog about maps

rare-maps.com - Antique and Rare Maps - Art Source International - Links to rare and antique maps and to cartography resources.

Google

* earth.google.com - Google Earth: Interactive map of the world

* maps.google.com - Google Maps Google's map system, similar to Mapquest.

flourish.org - The Upsidedown Map Page Pictures and info about maps which are oriented without North at the top

en.wikipedia.org - Wikipedia:Maps, use of maps on WikipediaNote that map services with various zoom levels sometimes show a new map item, such as a new bridge, only on a smaller-scale map and not on an available larger scale map, because the latter is not as often updated, see e.g. the Tuas Second Link on multimap.com, and larger scales which do not show !it.Category:Cartographybn:ম� ��নচিত্রca:Plànol cs:Mapada:Kort? (geografi)de:Karte !(Kartografie)et:Kaartes:Mapaeo :Mapofr:Cartegl:Mapahr:Kartaid :Petahe:מפהhu:Térképnl:Ka art? !(cartografie)ja:地図pl:Mapap t:Mapasl:Zemljevidsu:Atlasfi:K arttasv:Kartavi:Bản? !đồtr:Haritazh:地图

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