GIS Dictionary

[uncertainty] In GIS, a state of uncertainty in data classification that exists when an attribute applies to an indeterminate quality […]

[ESRI software] In coverages, the number of arcs that begin or end at a node.

[ESRI software] A table that lists the nodes in a data layer along with their valencies.

[ESRI software] A component of the PLTS knowledge base that contains the valid attribute combinations and rendering information for the

1 [software] The process, using formal methods, of evaluating a system or software component to determine whether it functions as

[data quality] A rule applied to objects in the geodatabase to ensure that their state is consistent with the system

1 [mathematics] A measurable quantity that may be passed to a function. Values are either assigned or determined by calculation.

1 [mathematics] A symbol or placeholder that represents a changeable value or a value that has not yet been assigned.

[spatial analysis] A drawing technique for hiding part of one layer using another set of features. Variable depth masking allows

[statistics] A numeric description of how values in a distribution vary or deviate from the mean. The larger the variance,

[surveying] In surveying, the symmetric 3×3 matrix that mathematically expresses the correlation between errors in coordinates x, y, and z.