![]() ![]() The output thus generated will be produced without comment even though it may have error greater than the accuracy requirement of an application. Most GIS software will not communicate this error or even its possibilities to the user. Without a good understanding of the basic map concepts, it is very easy to misuse geographic data. Although a GIS transcends the traditional paper map, many of the principles that dictate mapping locations on the earth’s surface also apply to a GIS. Limitation of size/level of distribution Some of the scales used in the topographic sheets are Because of its national importance the topographic maps of The official agency preparing maps in India is The Survey Of ![]() May form a part of a district or more than two. A region is divided into number of smaller sections for It depicts the elevation of an area as contours. The database extent defines the limit of area of interest The size of the study area depends on the map scale. Usually defined by a rectangle large enough to include all The area on the earth’s surface represented on map. It refers how accurately location and shape of features can Precision of attribute database linked to the map’s features.To displacement of same points in the real world Refers the displacement between two points on a map compared.Important for surveying and engineering based applications.Relationship between geographic Position on a map and it’s real.» GRAPHICAL : SHOW AS LINE DIVIDED INTO EQUAL PARTSĭepends on Quality of source data, Map scale, Drafting skill and » RATIO : EXPRESSED AS A FRACTION as 1:50,000 RATIO OF THE DISTANCE OF THE MAP TO THE. AREA FEATURE- closed figure whose boundary encloses a LINE FEATURE- a continuous string of coordinates E.g. POINT FEATURE- a single location depicted by a label E.g. Legend (The colours and symbols used in the map to specify the Mapping Feature (The area to be represented in a map) (Preserve the area of displayed features)Ĭartographic design uses symbology and typography toĬonvey geographical information in a manner which is bothĪppealing to the eye and easily understood.Ī map symbol is a graphic design which represents a map ![]()
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