GIS Dictionary

table

A set of data elements arranged in rows and columns. Each row represents a single record. Each column ...

table view

A representation of tabular data for viewing and editing purposes. The table view created when a table is added to ...

tag

1 In markup languages such as XML and HTML, a set of bracketed characters that define the structural purpose ...

target theme

In ArcView 3.x, the theme from which features are selected during a theme-on-theme selection operation. Multiple target themes ...

task

In ArcGIS Explorer and ArcGIS Server, a user interface combined with a particular piece of GIS functionality in ...

TCP/IP

Acronym for Transmission Control Protocol/Internet Protocol. The most common protocol for Internet traffic. The Transmission Control Protocol (TCP) is a ...

terrain dataset

A multiresolution, TIN-based surface built from measurements stored as features in a geodatabase. Associated and supporting rules help ...

terrain tiles

A spatially coherent organization of terrain data facilitating efficient retrieval and editing. Tile definition is based on the ...

tessellation

The division of a two-dimensional area into polygonal tiles, or a three-dimensional area into polyhedral blocks, in such ...

theme

In ArcView 3.x, a set of related geographic features such as streets, parcels, or rivers, along with their ...

theodolite

A surveying instrument for measuring vertical and horizontal angles, consisting of an alidade, a telescope, and graduated circles mounted ...

tic

A registration or geographic control point for a coverage representing a known location on the earth's surface. Tics ...

TIGER

Acronym for Topologically Integrated Geographic Encoding and Referencing. The nationwide digital database developed for the 1990 census, succeeding ...

TIGER/Line files

A digital database of geographic features, covering the entire United States and its territories, that provides a topological description of ...

tight coupling

A high or complex degree of interconnections between the components within a program or between programs, that requires substantial overlap ...

tiling

An internal subsetting of a spatial dataset (commonly raster) into a manageable rectangular set, or rows and columns ...

time mode

One of two methods for displaying temporal data in ArcGIS Tracking Analyst: real-time mode or playback mode. Time ...

TIN

Acronym for triangulated irregular network. A vector data structure that partitions geographic space into contiguous, nonoverlapping triangles. The vertices of ...

TIN dataset

A dataset containing a triangulated irregular network (TIN). The TIN dataset includes topological relationships between points and neighboring ...

TIN layer

A layer that references a set of TIN data. TIN data contains a triangulated irregular network (TIN) and ...

TLM

Acronym for topographic line map. A map that uses line contours to show elevations and depressions of the earth's ...

TNA

Acronym for thread neutral apartment. An apartment that has no threads permanently associated with it; threads enter and leave ...

to-node

Of an arc's two endpoints, the last one digitized. From- and to-nodes give an arc left and right sides and, ...

token

A line of encrypted code generated by an authenticating service that allows a client to access a Web ...

tolerance

The minimum or maximum variation allowed when processing or editing a geographic feature's coordinates. For example, during editing, ...

tool

1 A command that requires interaction with the GUI before an action is performed. For example, a zoom tool ...

toolbox

In ArcGIS, an object that contains toolsets and geoprocessing tools. It takes the form of a .tbx file ...

toolkit

An application that software developers can use with their integrated development environment (IDE) to make programming easier. For example, ...

topographic map

A map that represents the vertical and horizontal positions of features, showing relief in some measurable form, such as contour ...

topography

The study and mapping of land surfaces, including relief (relative positions and elevations) and the position of natural and ...

topology

1 In geodatabases, the arrangement that constrains how point, line, and polygon features share geometry. For example, street ...

topology fix

In ArcMap, a predefined method for correcting topology errors. For example, predefined topology fixes for a dangling line ...

topology rule

An instruction to the geodatabase defining the permissible relationships of features within a given feature class or between ...

tour

In ArcInfo Workstation, a network solver that determines the minimum-cost path to reach a series of stops, and ...

TPS setup

In Survey Analyst for field measurements, a group of field book entries that belong together define a single ...

track

1 In ArcMap, ArcScene, and ArcGlobe, an ordered collection of similar keyframes that, when played as an animation, ...

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