GIS Dictionary

[map design] A map scale that expresses the relationship between distance on the map and distance on the ground in […]

[software] The process, using formal methods, of evaluating a system or software component to determine whether it satisfies the requirements

1 [database structures] In databases, an alternative state of the database that has an owner, a description, a permission (private,

[database structures] The process of reconciling two versions of a dataset into a common version. If conflicting edits have been

[database structures] The process of updating a version of a dataset with changes made in another version. Using this technique,

[Euclidean geometry] One of a set of ordered x,y coordinate pairs that defines the shape of a line or polygon

[coordinate systems] A reference system that defines the location of z-values relative to a surface. The surface may be gravity

[cartography] A multiplier applied uniformly to the z-values of a three-dimensional model to enhance the natural variations of its surface.

[geodesy] A geodetic datum for any extensive measurement system of heights on, above, or below the earth’s surface. Traditionally, a

[aerial photography] An aerial photograph taken with the camera lens pointed straight down.

[ESRI software] In ArcGIS, a parameter that offsets the z-origin from the surface of a vertical coordinate system. The vertical