GIS Dictionary

object

1 In GIS, a digital representation of a spatial or nonspatial entity. Objects usually belong to a class ...

ODL

Acronym for Object Definition Language. Similar to Interface Definition Language, but used to define the objects contained in an ...

offset

1 In cartography, the displacement or movement of features so that they do not overlap when displayed at a ...

OGC

Acronym for Open Geospatial Consortium. An international consortium of companies, government agencies, and universities participating in a consensus process ...

OGIS

Acronym for Open Geodata Interoperability Specification. A specification, developed by the Open Geospatial Consortium, Inc., to support interoperability of GIS ...

OLB

Acronym for object library. A binary file that stores information about a logical collection of COM objects and their ...

OLE

Acronym for Object Linking and Embedding. A protocol from Microsoft that allows the development of reusable objects that can ...

OLE DB provider

Object Linking and Embedding database provider. A tool conforming to the OLE standard for sharing data between applications. Each OLE ...

OLE View

A utility, available as part of Microsoft Visual Studio, that can be used to view type information stored ...

OpenLS

Acronym for OpenGIS Location Services. A protocol, designed to work across the many different wireless networks and devices, ...

operand

A data value or the symbolic representation of a data value in an expression. Operands may be numbers, character strings, ...

operation codes

In surveying, an alphanumeric or numeric value included in an instrument vendor's data collector file format. Operation codes are ...

operator

The symbolic representation of a process or operation performed against one or more operands in an expression, such as ...

optimization

The process of fine-tuning data, software, or processes to increase efficiency, improve performance, and produce the best possible ...

Oracle

A database company that produces a relational database management system (also called Oracle), which allows data and other objects ...

order

In ArcGIS Network Analyst, a network location used to determine routes in vehicle routing problem (VRP) analysis. Users ...

order pair

In ArcGIS Network Analyst, an object used in vehicle routing problem (VRP) analysis. An order pair defines a ...

ordinate

In a rectangular coordinate system, the distance of the y-coordinate along a vertical axis from the horizontal or ...

origin

1 A fixed reference point in a coordinate system from which all other points are calculated, usually represented ...

orthophoto

An aerial photograph from which distortions owing to camera tilt and ground relief have been removed. An orthophoto ...

orthophotoquad

An orthophotograph that has been formatted as a USGS 1:24,000 topographic quadrangle with little or no cartographic enhancement.

orthophotoscope

A photomechanical or optical-electronic device that creates an orthophotograph by removing geometric and relief distortion from an aerial ...

outlier

1 An unusual or extreme data value in a dataset. In data analysis, outliers can potentially have a strong ...

output

A satellite image, aerial photograph, or scanned map over which vector data is displayed. Although a background image ...

overlay

1 A spatial operation in which two or more maps or layers registered to a common coordinate system are ...

overprinting

1 In cartography, portraying cartographic updates on a map by printing new or modified information over the original cartography, ...

override

1 In network datasets, a type of junction connectivity policy in which the way junctions connect to other ...

overview

In ArcGIS, a lower-resolution image created to increase display speed and reduce CPU usage when viewing a mosaicked ...

owner

1 The person or organization responsible for creating and maintaining data or a map. The owner determines who ...