map accuracy

map accuracy

(1) (Data West Research Agency definition: see GIS glossary.) The closeness of results of observations, computations, or estimates of graphic map features to their true value or position. Relative accuracy is a measure of the accuracy of individual features on a map when compared to other features on the same map. Absolute accuracy 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. In the case of some plotting and display devices, accuracy refers to tolerance in the display of graphic features relative to the original coordinate file.

(2) (Data West Research Agency definition: see GIS glossary.) The level of allowable error of maps, as applied by National Map Accuracy Standards, is determined by comparing the positions of well-defined points whose locations or elevations are shown on the map with corresponding positions as determined by surveys of a higher accuracy. The accuracy of any map is equal to the error inherent in it as due to the curvature and changing elevations contained in each map from which the map was made, added to or corrected by the map preparation techniques used in joining the individual maps.
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the service includes a mark-staking on the ground of the existing networks as well as the report on a plan in 3 dimensions (x, y, z) data, and map accuracy class a (*).
The SAR classified output gives accuracy of 93.15% and the Landsat-8 classified map accuracy was 91.34 %, while the Kappa coefficient for SAR and Landsat-8 classified images is 0.92 and 0.89, respectively.
Similar comparisons of different maps and gazetteers, as well as investigations of map accuracy, can be made when the maps become geocoded images.
To verify the effect of the number of particles on map accuracy, we set the number of particles in the STUFastSLAM algorithm to be 10, 20, and 40 particles, respectively.
Although statistical validation gives a good overall estimate of map accuracy judged against an independent sample, the spatial distribution of relative error in a map is often of more concern to map users (Heuvelink 2014).
Most of us can benefit from improving our body maps, however, and thousands of repetitive movements over many years makes awareness of body map accuracy and adequacy important for preventive and remedial care.
There are two types of map accuracy assessment: thematic and positional.
Test NMAS (National Map Accuracy Standards) del United States Bureau of the Budget utilizado para comprobar la calidad de la cartografia del United States Geological Survey (USGS) desde 1947, sirviendo de modelo para muchas instituciones cartograficas de todo el mundo.
Finally, results from each method were reviewed separately and then the amount of each method and map accuracy and were evaluated.
Accuracy Analyst version 2.0 provides software-based map accuracy and content enhancement solutions.
Community input of GPS data collection now helps Tele Atlas to detect changes and perfect its maps worldwide to the highest industry standard for map accuracy of five metres or 16 feet or less.