GIS Dictionary

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ISO

[standards] Abbreviation for International Organization for Standardization. A federation of national standards institutes from 145 countries that works with international […]

isobar

A line on a weather map connecting places of equal barometric pressure.

isochrone

1 [cartography] A line on a map connecting points of equal elapsed time; especially, travel time to or from a

isohyet

[cartography] A line on a map connecting points of equal rainfall.

isolation level

[ESRI software] A setting in a database management system (DBMS) that defines how much an application process is isolated from

isoline

[cartography] A line connecting points of equal value on a map. Isolines fall into two classes: those in which the

isometric line

[cartography] An isoline drawn according to known values, either sampled or derived, that can occur at points. Examples of sampled

isopleth

[cartography] An isoline drawn according to known values that can only be recorded for areas, not points. Examples include population

isotherm

A line on a map connecting points of equal temperature.

isotropic

[analysisgeoprocessing] Having uniform spatial distribution of movement or properties, usually across a surface.

isotropy

[spatial statistics use for geostatistics] A property of a natural process or data where spatial dependence (autocorrelation) changes only with

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