Home (Absolute Accuracy)
Home  
 
 
Home » GIS » Absolute Accuracy


 

Absolute Accuracy

GIS AbscissaAbsolute coordinates

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
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 absolute accuracy 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.

These are relative and absolute accuracy. Absolute accuracy concerns the accuracy of data elements with respect to a coordinate scheme, e.g. UTM. Relative accuracy concerns the positioning of map features relative to one another.

Absolute accuracy criteria will evaluate the measure of the maximum deviation between the location of the digital map feature and its location in the real-world.

It is not used in situations where absolute accuracy 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.

Absolute accuracy is a measure of the location of features on a map compared to their true position on the face of the Earth.

The quality of a DEM is a measure of how accurate elevation is at each pixel (absolute accuracy) and how accurately is the morphology presented (relative accuracy). Several factors play an important role for quality of DEM-derived products: ...

NAIS Implementation Guide Glossary
absolute accuracy
See 'positional accuracy'.

Operating in a radiometer mode, the radar could sense surface radio-emission, whose signals can be converted to brightness temperatures with an absolute accuracy of ±20° K.

According to the information provided by NIMA, the model has the absolute accuracy of 30m, while the relative accuracy is better than 20m.

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. Absolute accuracy is based on geographic coordinates.

in a V2V scenario, one vehicle may only need to know if the other is on the same road or not, while in the absolute sense both vehicles could be in error by more than 5 meters. For V2I applications, however, this becomes an absolute accuracy ...

See also: Accuracy, Information, Mapping, Feature, Survey