Home (Absolute Accuracy)

 GIS 

What is what? Everything you always wanted to know.
  » »
 
   

Absolute Accuracy

GIS  Abscissa  Absolute coordinates

Absolute Accuracy
absolute accuracy - [coordinate systems] The degree to which the position of an object on a map conforms to its correct location on the earth according to an accepted coordinate system. [Category=Geospatial ] ...


absolute accuracy
[coordinate systems] The degree to which the position of an object on a map conforms to its correct location on the earth according to an accepted coordinate system.

Absolute Accuracy: Exact correspondence between the location of features in map data and their actual positions on the earth.

Absolute Accuracy
Refers to the position of an object position in relation to a control survey network. (See also Accuracy and Compare with Relative Accuracy.)
Absolute Coordinate ...

Absolute accuracy refers to the relationship of a point in the database to its actual location on the globe.
Relative accuracy refers to the relationship of one point in the database to another point in the same database.

~
The degree to which the position of an object on a map conforms to its correct location on the earth according to an accepted coordinate system.

This ~ estimate assumes that the fixed (existing) control is superior to the survey being performed and that any position misclosures at connecting points are due to internal observational errors and not the existing control.

~ is a measure of the location of features on a map compared to their true position on the face of the Earth. Mapping accuracy standards generally are stated as acceptable error and the proportion of measured features that must meet the criteria.

It is not used in situations where ~ is required. However, it does produce a compromise image which minimizes distortions in area, direction, and distance and therefore gives an excellent overall sense of the area being mapped.

Closeness of results of observations, computations, or estimation of spatial features to their true value of position. "~" is the differential between the actual real world location of a point on the surface of the earth and its mathematically assigned geographic coordinate.

NAIS Implementation Guide Glossary
~
See 'positional accuracy'.

According to the information provided by NIMA, the model has the ~ of 30m, while the relative accuracy is better than 20m. To achieve the goal of homogeneous accuracy in Hungary, the coverage of [43,5 j 51 and 13l25] was used from the global model.

When data is captured, the user should consider if the data should be captured with either a relative accuracy or ~, since this could not only influence how information will be interpreted but also the cost of data capture.

accuracy, absolute The accuracy of a map in representing the geographic location of an object relative to its true location on the surface of the Earth. ~ is based on geographic coordinates.

See also: See also: What is the meaning of Accuracy, Map, Mapping, Location, Geographic?

◄ Abscissa   Absolute coordinates ►
 
RSS Mobile