a point, interior to a polygon, whose coordinates are the averages of the corresponding coordinates for all the points joined to produce the polygon. It is the visual center of the polygon, and is sometimes used as the location to which the polygon's attributes are tagged.
The centroid (sometimes called a center of gravity) of a bounded surface is the center point or middle point of the area. Traditionally, this point is found by cutting the area out of cardboard and balancing it on a pin. The balance point location is the centroid.
Similar to the concept of center of gravity, except that it applies to a two dimensional shape rather than an object. For a given shape, the centroid location corresponds to the center of gravity for a thin flat plate of that shape, made from a homogeneous material.
is the term given to the center of an area, region, or polygon. In the case of irregularly shaped polygons, the centroid is derived mathematically and is weighted to approximate a sort of "center of gravity." Centroids are important in GIS because these discrete X-Y locations are often used to index or reference the polygon within which they are located. Sometimes attribute information is "attached," "hung," or "hooked" to the centroid location.
The geometric center of a feature. Of a line, it is the midpoint; of a polygon, the center of area; of a three-dimensional figure, the center of volume. The centroid will not always be where you expect it. In this example, it is in the center of a box drawn around the entire state. The centroid for Idaho is the red circle on the map.
The centre point of a polygon, often used to attach attribute information to an area such as a census ward. The centroid may be mathematically derived (such as the centre of gravity) or may be user defined. It must always be placed inside the polygon.
Any point used to label the attribute information link in a spatial database (polygon, line or point). The geometric center of polygon may be calculated as the average location of all vertices of a polygon boundary. Any single location within a polygon, arithmetically derived or not, to which attribute information about that polygon is linked.
In geometry, the centroid or barycenter of an object X in n-dimensional space is the intersection of all hyperplanes that divide X into two parts of equal moment about the hyperplane. Informally, it is the "average" of all points of X.