GIS Glossary

A table used to assess the accuracy of classified data, especially in remote sensing and land cover analysis (standard GIS usage).

A leading GIS software company, whose tools (like ArcGIS) are widely used for spatial data analysis.

The straight-line distance between two points in space, commonly used in proximity analysis (standard GIS usage).

A spatial occurrence or phenomenon recorded in GIS, often used in event mapping or dynamic segmentation (standard GIS usage).

A GIS layer created from tabular data containing location information, often used for mapping incidents or observations (standard GIS usage).

The process of saving spatial data or analysis results in a different format for use in other applications (standard GIS usage).

The geographic area covered by a dataset or map, defined by minimum and maximum coordinates; crucial for setting analysis boundaries (standard GIS usage).

Estimating values outside the range of observed data, often used in spatial prediction and modelling (standard GIS usage).

In topology, a polygonal area bounded by edges, important in advanced spatial modelling (standard GIS usage).

In 3D GIS, a flat surface that forms part of the boundary of a solid object, important in terrain and surface modelling (standard GIS usage).

Arbitrary values added to x or y coordinates in a projected coordinate system to avoid negative numbers, important for map projections.

A spatial object in GIS, such as a point, line, or polygon, representing real-world entities like buildings, roads, or lakes. Features are the primary units of analysis in vector data models.

A collection of similar features (all points, all lines, or all polygons) stored together, often used as a basic organizational unit in spatial databases (standard GIS usage).

The process of identifying and digitizing features from imagery or other data sources for spatial analysis (standard GIS usage).

A GIS layer that displays and allows analysis of features from a feature class, enabling visualization and spatial queries (standard GIS usage).

A column in an attribute table that stores specific information about each feature, such as population or land use type. Fields are crucial for querying and analysing spatial data.

A process that modifies spatial data or images by emphasizing or suppressing certain features, often used in raster analysis (standard GIS usage).

A raster dataset where cell values are stored as floating-point numbers, allowing for continuous data representation such as elevation or temperature(standard GIS usage).

The calculation of how much flow accumulates in each cell of a raster, used to identify drainage patterns and stream networks (standard GIS usage).

In hydrological analysis, the direction water will flow out of each cell in a raster DEM, foundational for watershed and stream network modelling (standard GIS usage).