GIS Dictionary

[symbology] A map symbol that shows the direction of north on the map, thereby showing how the map is oriented.

1 [coordinate systems] The distance north of the origin that a point in a Cartesian coordinate system lies, measured in

[navigation] Acronym for Notice to Airmen. An advisory bulletin containing information about the National Airspace System, typically time-sensitive information between

[Internet] In ArcGIS Online, status message about your group membership request.

Acronym for National Spatial Data Infrastructure. A federally mandated framework of spatial data that refers to U.S. locations, as well

[data sharing] A community of digital spatial data providers that maintain NSDI Clearinghouse Nodes as part of the U.S. National

An Internet server that hosts a collection of metadata and data maintained and stored on a computer server by a

[navigation] Acronym for Notice to Mariners. A periodical update to existing nautical charts, issued by maritime authorities.

[spatial statistics use for geostatistics] A parameter of a covariance or semivariogram model that represents independent error, measurement error, or

[ESRI software] A DBMS-defined restriction specifying that a column cannot contain a null value.

[statistics] A statement that essentially outlines an expected outcome when there is no pattern, no relationship, and/or no systematic cause