Dataset of elevation values that are assigned algorithmically to 2-dimensional coordinates.

computer-aided design, software packages designed to automate drafting of mechanical drawings

Representation of a concept by a sign which denotes it.

The field measurements (e.g., land survey) that determine the physical locations of boundary markers of cadastral parcels.

Database management system. DBMS sometimes refers to the software that contains and organizes the data, and sometimes refers to an organizational plan for the use of information within a single project, or within one unit or the whole of an organization.

Period having a duration nominally equivalent to the periodic time of the Earth's rotation around its axis.

Parameter or set of parameters that define the position of the origin, the scale, and the orientation of a coordinate system.

Collection of datasets sharing the same product specification.

Identifiable collection of data.

An interactive tool for viewing and downloading GIS datasets. It allows users to download datasets by user defined geographic extents or selections. The Café also allows users to browse GIS datasets, print maps, and save mapping sessions for later use or for sharing with others.

A one-stop-shop for finding geospatial data pertaining to the seven county Twin Cities metropolitan area. Its primary function is to facilitate sharing of GIS data among organizations and provides metadata describing GIS datasets, which can be directly downloaded or used via web services.

[data structure] A database schema is supported in relational database management systems (RDBMS) and acts as blueprints for how database entry will be constructed.

 A logical collection of interrelated information, managed and stored as a unit. A GIS database includes data about the spatial location and shape of geographic features recorded as points, lines, and polygons as well as their attributes.