Whenever a human is placed at an identifiable point inside a front yard of such a map, so the map may be oriented inside such how else that each point on the map lies inside the equivalent counsel when the corresponding point in reality. A practice of navigating therein way is orienteering.

For a vertically placed map representing the horizontal front yard confessedly orientation is non conceivable, naturally, however these are occasionally estimated by putting the send on counsel higher.

From time to time the map get on the ceiling, correct showing directions; therearound example, refer i have in clockwise counsel forward, left, feebleminded, & right. Whenever the map is prepared in the table, to exist as connected to the ceiling, so negotiable these are a mirror image of a normal map.

Scale and accuracy

Several but not completely maps come drawn to the scale, allowing a reader to infer a actual sizes of, & distances between, depicted objects. a big shell shows further detail, so requiring the big map to show the equivalent front yard. For instance, maps designed for a tramp come typically scaled at the ratio 1:24,000, meaning that 1 of any unit of measurement on the map corresponds to 24,000 of that equivalent unit actually; when maps designed for the automobilist come typically scaled at 1:250,000. Maps which apply a few quality differently physical front yard to determine proportional size come known as cartograms.

The noted case of the map forswearing shell is the London Underground map, which best fulfils its purpose by existence less physically exact & other visually communicative to the hurried glimpse of the commuter. This is non the cartogram (since no uniform measure of few feet away) however the topological map that also depicts approximate bearings. A elementary maps shown in a few directing road signs are further examples of this form.

within point of fact, virtually all commercial navigational maps, like road maps & town plans, sacrifice an total of accuracy in shell to deliver a greater ocular utility to its user, e.g. by exaggerating the breadth of roads. Using a end-user similarly in mind, map maker might censor the content of the space depicted by the map sequentially provide the utile thing to it user. For even instance, the road map might or might not indicate railroads, and in case it does, it might indicate the children less clearly than highways.

World maps and projections
Maps of the globe or even big areas come typically either 'political' or even 'physical'. A first purpose of a political map is to show territorial borders; the purpose of the physical is to show features of geography such as mountains, soil type or even land have. Geologic maps indicate non sole a physical surface, however characteristics of the underlying rock, fault lines, and subsurface structures.

Maps that depict the surface of the Globe besides utilise a projection, a way of translating a 3-cubic very surface of the geoid to a both-planar picture. Mayhap a right-known globe-map projection is the Mercator Projection, originally designed as a form of nautical chart.

Pilot utilize aeronautic stock and index charts according to the Lambert conformal conic projection, in which a cone is placed across the division of the gloexist as to be mapped. A cone intersects a sphere (a globe) at one or even deuce parallels which are then chosen when standard lines. This allows the pilots to plot a great-circle route approximatiin on a flat, both-planar chart.

Electronic maps
From either a survive quarter of a 20th century, a indispensable convienence of the map maker has been the computer. Good deal of mapmaking, especially at a information-gathering survey level, has been subsumed by Geographic Information Systems (GIS). Potentially while GIS is non included, virtually all map maker today apply the kind of computer graphics software online to generate freshly maps. Interactional, computerized maps come commercially available, leaving users to zoom within or even zoom retired (severally meaning to increase or even decrease a shell), every now and again by replacing a single map by using a second of different shell, centred in which conceivable on the equivalent point. Inside-car satellite navigation systems are computerised maps by using route-planning & advice facilities which monitor by satellite a position of the user.

From either a computer scientist's point of view, zooming around entails of these or even the combination of:

For instance:

Typically (Deuce) applies to the Portable Document Format (PDF) file. the increase around detail is, naturally, limited to the info contained around the file: enlargement of the curve might sooner or even later symptom in a series of standard geometrical numbers like straight lines or arcs of circles. (Two) can use to text & (Troikthe) to the outline of the map feature like a outdoors or even building. (One) will use to the text (displaying labels for additional features), when (Two) applies to the rest of the image. Text is non necessarily enlarged while zooming inside. Likewise, the road represented by the double line could or even might not be wider whilst of these zooms around. The map might as well stand shells which are then partially raster graphics and partly vector graphics. For one raster graphics image (Ii) applies until a pel in the image file correspond to the picture element of the display, thenceforth (Terzetto) applies.

A word "map" has as well been utilized to describe wharehouses in video games, such as SOCOM II: U.S. Navy SEALs and Counter-Strike, that players choose to compete on, as a synonym for level.

Look at as well Webpage (Graphics), PDF (Layers), Mapquest, or Yahoo! Maps.