GIS Dictionary

The mental processes involved in gaining and using knowledge and beliefs about spatial environments. Spatial cognition includes issues of perception,

1 [data structures] Information about the locations and shapes of geographic features and the relationships between them, usually stored as

[database structures] A structured collection of spatial data and its related attribute data, organized for efficient storage and retrieval.

1 [standards] For a spatial dataset in ArcGIS 9.1 and previous versions, the defined precision and allowable range for x-

[ESRI software] In ArcGIS Spatial Analyst, an operation that performs spatial analysis. All Spatial Analyst tools in the Spatial Analyst

[data models] A two-dimensional grid system that spans a feature class. It is used to quickly locate features in a

[ESRI software] In a geodatabase, a mechanism for optimizing access to data based on the spatial column of the business

[spatial analysis] A type of table join operation in which fields from one layer’s attribute table are appended to another

[modeling] A methodology or set of analytical procedures used to derive information about spatial relationships between geographic phenomena.

[analysisgeoprocessing] The process of superimposing layers of geographic data that cover the same area to study the relationships between them.

[analysisgeoprocessing] A type of analysis in which data is extracted from one layer (such as block groups) to an overlay