GIS Dictionary

ICAO

Acronym for International Civil Aviation Organization. A member organization that represents the worldwide body of nations for standardizing flight ...

icon

In MOLE, the innermost graphic component of a graphic. Icons represent the Function ID position of a Symbol ...

ID

An ID assists with the design and flow of the course, helping the author with the organization of the ...

IDD

Acronym for interface identifier. A string that provides the unique name of an interface. An IID is a type ...

IDE

Acronym for integrated development environment. A software development tool for creating applications, such as desktop and Web applications. IDEs ...

identity

In geoprocessing, a topological overlay that computes the geometric intersection of two datasets. The output dataset preserves all the ...

IDispatch

A generic COM interface that has methods allowing clients to ask which members are supported. Classes that implement ...

IDL

Acronym for Interface Definition Language. A language used to define COM interfaces. The Microsoft implementation of IDL may also ...

IFSAR

Acronym for interferometric synthetic aperture radar. A dual-antenna radar sensor mounted on an airborne or space-borne platform that ...

image

1 A representation or description of a scene, typically produced by an optical or electronic device, such as ...

image data

Data produced by scanning a surface with an optical or electronic device. Common examples include scanned documents, remotely ...

image division

A digital image processing technique for increasing the contrast between features in an image by dividing the pixel values in ...

implement

In programming an interface, to provide code for each of the methods of an interface (the interface is defined ...

import

To bring data from one computer system or application into another. Importing often involves some form of data ...

incident

In ArcGIS Network Analyst, a network location used in closest facility analysis. Car accidents, crime scenes, and fires ...

INCITS

Acronym for International Committee for Information Technology Standards. An ANSI-accredited forum that creates and maintains information and communications technology ...

index

A data structure, usually an array, used to speed the search for records in a database or for spatial ...

index map

A schematic map used as a reference for a collection of map sheets, outlining the total area covered along ...

industry

An organization with specific GIS needs. Examples of industries include government, transportation, health care, homeland security, and public ...

infrastructure

The system of human-made physical structures, such as roads, bridges, canals, cables, wires, communications towers, hospitals, pipes, reservoirs, and ...

inheritance

In object-oriented programming, the acquisition of methods and properties by child classes or interfaces from their previously existing parent ...

input table

In geoprocessing, tabular data put into the system for processing, usually specified by a path in a dialog box, ...

instance

1 In object-oriented programming, a single object created based on the template or definition of the class to which ...

interpolation

1 The estimation of surface values at unsampled points based on known surface values of surrounding points. Interpolation can ...

intersect

A geometric integration of spatial datasets that preserves features or portions of features that fall within areas common to ...

intranet

A computer network, often using the same software and serving the same functions as those found on the Internet, ...

IP address

Acronym for Internet protocol address. A unique number, such as 10.48.6.8, that identifies each computer on the Internet. IP addresses ...

isanomal

A line on a map connecting points of equal difference from a normal value, usually a meteorological value such ...

ISO

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

isoline

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

isopleth

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

isotropy

A property of a natural process or data where spatial dependence (autocorrelation) changes only with ...

item

1 An element in the Catalog tree. Items include data sources, such as shapefiles and geodatabases, and nonspatial ...

IUnknown

All COM interfaces inherit from the IUnknown interface. The default implementation of IUnknown controls object lifetime and provides runtime ...