GIS Dictionary

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line of sight

1 [3D analysis] A line drawn between two points, an origin and a target, that is compared against a surface […]

line simplification

[cartography] A generalization technique in which vertices are selectively removed from a line feature to eliminate detail while preserving the

line smoothing

The process of adding extra points to lines to reduce the sharpness of angles between line segments, resulting in a

line-on-line overlay

[linear referencing] In linear referencing, the overlay of two line event tables to produce a single line event table. The

line-on-point overlay

[linear referencing] In linear referencing, the overlay of a line event table and a point event table to produce a

lineage

[ESRI software] A collection of states representing the changes that have occurred over time in a versioned geodatabase.

linear dimension

A measurement of the horizontal or vertical dimension of a feature. Linear dimensions may not represent the true distance between

linear interpolation

[spatial statistics use for geostatistics] The estimation of an unknown value using the linear distance between known values.

linear referencing

[linear referencing] A method for storing geographic data by using a relative position along an already existing line feature; the

linear unit

[cartography] The unit of measurement on a plane or a projected coordinate system, often meters or feet.

link

1 [photogrammetry] In georeferencing, connections added between known points in a dataset being georeferenced and corresponding points in the dataset

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