dcgis: DC GIS Glossary 1a
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DC GIS Glossary 

For more information or for terms not defined here, please visit the ESRI GIS Dictionary

Term Definition
Education Formal education information. For example, schools, universities, colleges, and related activities.
Elevation
Height above or below sea level. For example, resources describing altitude, bathymetry, digital elevation models, slope, and products derived from this information.
Environment
Environmental resources, protection, and conservation. For example, resources describing pollution, waste storage and treatment, environmental impact assessment, water features, and drainage systems.
Facility and Structure Manmade construction. For example, resources describing buildings, fences, and related items.
Feature Class
A collection of geographic features with the same geometry type (such as point, line or polygon), the same attributes, and the same spatial reference.
  • Point - a geometric element defined by a pair of x,y coordinates
  • Poly Line - a shape defined by a series of connected line segments
  • Polygon - a closed shape defined by a connected sequence of x,y coordinate pairs, where the first and last coordinate pair are the same and all other pairs are unique
Gazetteer A geographical dictionary, an important reference for information about places and place-names and associated spatial location
Field Research The gathering and research of information at the physical location; as opposed to research or information gathering in the office.
Geocoding
The process of assigning geographic identifiers (eg, codes or geographic coordinates expressed as latitude-longitude) to map features and other data records, such as street addresses.
GIS
Geographic Information System, a system for capturing, storing, analyzing, and managing data and associated attributes which are spatially referenced to the earth. In the strictest sense, it is a computer system capable of integrating, storing, editing, analyzing, sharing, and displaying geographically-referenced information. In a more generic sense, GIS is a tool that allows users to create interactive queries (user-created searches), analyze the spatial information, edit data, and present the results of all these operations.
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