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In GIS (Geographical Information System) vector data represent the information in points, lines and polygons.
as the boundary of a city (on a large scale map), lake or forest. Polygon features are two dimentional and therefore can
be used to measure the area and perimeter of a geographic feature. Polygon feature are most commonly distinguished
using either a thematic mapping symbology (color schemes), patterns or in the case of numeric gradation, a color gradation
scheme could be used.
have one dimension and therefore can only be used to measure length. Line feature have a starting and ending point.
Common examples would be road centerlines and hydrology. Symbology most commonly used to distinguish arc features from
one another are line types (Solid line versus Dashed lines) and combinations using colors and line thickness. In the example
below roads are distinguished from the stream network by designating the roads as a solid black line and the hydrology a dashed