GIS Dictionary

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chain

[surveying] A unit of length equal to 66 feet, used especially in U.S. public land surveys. Ten square chains equal […]

chain code

[data capture] A method of drawing a polygon as a series of straight line segments defined as a set of

change detection

[remote sensing] A process that measures how the attributes of a particular area have changed between two or more time

character

[computing] A letter, digit, or special graphic symbol treated as a single unit of data and usually stored as one

chart

1 [cartography] A map used to plot a course for air or water navigation. 2 [mathematics] A graphic representation of

check-in

[ESRI software] In disconnected editing, the procedure that transfers a copy of data into a master geodatabase, overwriting the original

checkout

[ESRI software] A procedure in disconnected editing that records the duplication of data from one geodatabase to another and disables

checkout geodatabase

[ESRI software] In ArcGIS versions 8.39.1, a personal or ArcSDE geodatabase that contains data checked out from a master geodatabase

checkout version

[ESRI software] The data version created in a checkout geodatabase when data is checked out to that database during disconnected

checkout/check-in replication

[ESRI software] A type of geodatabase replication that involves copying data to a destination geodatabase, editing that data in the

chi-square statistic

[statistics] A statistic used to assess how well a model fits the data. It compares categorized data with a multinomial

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