GIS Dictionary

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unbuild parcel

[ESRI software] In Survey Analyst – Cadastral Editor, a cadastral fabric editing command that undoes the parcel generated from the […]

UNC

[computing] Acronym for Universal (or Uniform) Naming Convention. A PC format for specifying the location of resources on a local-area

uncertainty

[uncertainty] The degree to which the measured value of some quantity is estimated to vary from the true value. Uncertainty

unclosed parcel

1 [cadastral and land records] A parcel that is only partially defined or that is missing a sequence of one

uncommitted read

[ESRI software] The isolation level in an RDBMS specifying the minimum isolation from concurrent transactions. The transaction can read data

undershoot

[data capture] A line that falls short of another line that it should intersect.

undevelopable surface

[map projections] A surface, such as the earth’s, that cannot be flattened into a map without stretching, tearing, or squeezing

undirected network flow

[network analysis] A network state in which each edge may or may not have an associated direction of flow. In

uniform list

[ESRI software] In Survey Analyst for field measurements, one of two types of lists in the List page. The uniform

union

[analysisgeoprocessing] A topological overlay of two or more polygon spatial datasets that preserves the features that fall within the spatial

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