centroid
[data capture] The geometric center of a feature. For line, polygon, or three-dimensional features, it is the center of mass (or center of gravity) and may fall inside the feature, as shown below for a triangle, or outside the feature, ...
Multiple attributes may be linked to a single vector entity through numbered fields referred to as layers. Refer to v.category for more details, as v.centroids is simply a frontend to that module.
Centroid 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.
Centroid: The point that may be considered the center of a one- or two-dimensional figure.
Centroid The "center of gravity" or mathematically exact center of a irregular shaped polygon; often given as x, y coordinate of a parcel of land.
Centroid: 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.
Centroids are point locations representing areas, buildings or an approximate location.
Centroid
In terms of polygons, the geographic centre or the average of the x and y values making up the perimeter points.
Centroid - The geometric center of a polygon, computed mathematically from the locations of all the vertices defining the polygon. Sometimes centroids are estimated visually.
Centroid
In GIS, the geometric or geographic center of a polygon.
Chart ...
Centroidal Voronoi tessellation
Computational geometry
Delaunay triangulation
Mathematical diagram
Nearest neighbor search
Nearest-neighbor interpolation ...
Centroid
Any point used to label the location of a feature 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.
Area and centroid
Nomenclature of a 2D polygon.
The area of a polygon is the measurement of the 2-dimensional region enclosed by the polygon. For a non-self-intersecting (simple) polygon with n vertices, the area and centroid are given by[1]: ...
ZIP Code Centroids-- If address interpolation fails, the geocoding program will attempt to assign coordinates to an address based on the ZIP code for the address. When possible, a nine digit ZIP Code centroid (also known as the ZIP+4) is used.
Calculating Centroids
You will find that your parcel table already has columns created to hold the the X and Y ordinates for the centroid of each parcel.
Select features from cfi_centroid_points that are within a distance of features in Streams with a selection buffer distance of 50 feet, as shown:
Click Apply and then Close. The selected points are within 50 feet of a stream.
Shapes/polygons
Centroids/boundaries
Lines
Create topology from selection
Save analysis result as DGN
Save analysis result ...
Centroid: The geometric center of a polygon. In spatial information systems, the centroid is a point in a polygon to which attribute information about that specific area is linked.
By using the centroids of each prairie dog colony as a starting point for a cost surface, seven new cost surfaces are generated for each transforming surface (Figure 3 cost surface.
Computer database containing boundaries for areas such as census areas, postal areas and political or administrative areas, area centroids (points used to represent areas) and related associated attribute information such as area names, ...
/* Function: utmzone(geometry) DROP FUNCTION utmzone(geometry); Usage: SELECT ST_Transform(the_geom, utmzone(ST_Centroid(the_geom))) FROM sometable; */ CREATE OR REPLACE FUNCTION utmzone(geometry) RETURNS integer AS $BODY$ DECLARE geomgeog geometry; ...
M4### Record matched to the ZIP+4 of the address
M2### Record matched to the ZIP+2 of the address
MC### Record matched to the centroid of the city
MZ### Record matched to centroid of five-digit ZIP Code
UX### Record not matched ...
All of the facets are identical, as are the distances between the centroids of the adjoining clustered elements defining a very "natural" building block (see Author's Note).
In this application, the offset is determined by the centroid of the map and the click location. The programming codes in Zoom Out and Pan functions are almost the same as the codes in Zoom In function.
 See also: Map, Area, Location, Information, Feature
  
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