GIS Dictionary

[statistics] A scatter chart in which the quantiles of two distributions are plotted against each other.

[cartography] A rectangular map bounded by lines of latitude and longitude, often a map sheet in either the 7.5-minute or

1 [coordinate systems] In a rectangular coordinate system, any of the quarters formed by the central intersection of x and

[spatial statistics use for geostatistics] In spatial sampling, one of a set of identically-sized areas, often rectangular, within which the

[spatial statistics use for geostatistics] Comparison of the statistically expected and actual counts of objects within spatial sampling areas (quadrats)

A method for encoding raster data that reduces storage requirements and improves access speeds by storing values only for homogeneous

[data structures] Data classified or shown by category, rather than by amount or rank, such as soil by type or

[quality assurance] A process used to verify the quality of a product after its production.

[ESRI software] In ArcGIS Survey Analyst, when used together, the F test and W test are called the B method

[quality control] A process used during production of a product to ensure its quality.

[statistics] In a data distribution, a value representing a class break, where classes contain approximately equal numbers of observations. The