GIS Dictionary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
N- Na Ne Nm No Ns Nt Nu

nugget

[spatial statistics use for geostatistics] A parameter of a covariance or semivariogram model that represents independent error, measurement error, or microscale variation at spatial scales that are too fine to … Read more

null constraint

[ESRI software] A DBMS-defined restriction specifying that a column cannot contain a null value.

null hypothesis

[statistics] A statement that essentially outlines an expected outcome when there is no pattern, no relationship, and/or no systematic cause or process at work; any observed differences are the result … Read more

null value

[spatial statistics use for geostatistics] The absence of a recorded value for a field. A null value differs from a value of zero in that zero may represent the measure … Read more