[coordinate system] Control points are XY locations known to have a high degree of accuracy. They are used to convert digitized coordinates from paper maps and georeferencing to standard map projection coordinates.

Agreement between two or more principals that creates in each principal a duty to do or not do something and a right to performance of the other's duty or a remedy for the breach of the other's duty.
 

[data structure] A contour line is a constant value for mapping any variable such as elevation and temperature maps. Contour lines are used to map equal values and illustrate topography or relief on a map. They are also known as isopleth or isoline maps.

Set of concepts structured according to the relations among them.
 

[GIS dictionary] CAD is primarily used by engineers and architects for the purpose of producing two and three dimensional drawings.

Collection of targets potentially heterogeneous (each satisfying a different query criteria) whose locations fall within a small neighbourhood.
 

Software component that can invoke an operation from a server.
 

Definition used to assign objects to legend classes.
 

Abstract representation of real world phenomena using classifiers.
 

Abstraction of a property of an object or of a set of objects.
 

[GIS dictionary] Cartometry is a division of cartography concerned with depicting objects with a high level of spatial accuracy. Cartometric maps can be used to measure the perimeter of coasts, areas of countries, volumes, slopes and densities.

Coordinate system in Euclidean space which gives the position of points relative to n mutually perpendicular straight axes all having the same unit of measure.
 

Real-world effect that a service provider is able to provide to a service consumer.