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GIS Glossary

Looking to master GIS? This comprehensive GIS glossary covers essential GIS terms and definitions, perfect for both beginners and professionals. Explore the most important geospatial terminology, from spatial data terms and mapping terminology to advanced topological concepts in GIS. Whether you're diving into remote sensing, LiDAR, cartography, or GeoAI, our geospatial dictionary and GIS vocabulary reference help you understand the language of geographic information systems. Discover commonly used GIS acronyms and meanings, get a quick geo terms cheat sheet, and unlock the full GeoTech lexicon used in urban planning, environmental analysis, and earth observation. Stay ahead in the field with this up-to-date GIS glossary 2025, your go-to guide to GIS lingo explained for smart data analysis and decision-making.

Geospatial Interpolation

Geospatial Interpolation

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Methods for estimating unknown values at specific locations based on known values from surrounding locations, essential for surface analysis.

Geostatistics

Geostatistics

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A branch of statistics focused on analysing and modelling spatial or spatiotemporal datasets to understand spatial variability.

Global Positioning System (GPS)

Global Positioning System (GPS)

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A satellite-based navigation system that provides precise location information, widely used for data collection and mapping.

Grid-Based Analysis

Grid-Based Analysis

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A spatial analysis method that divides geographic space into a grid of cells, enabling raster-based modelling and calculations.

Ground Truth Verification

Ground Truth Verification

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The process of validating interpreted or predicted spatial data through direct observation in the field, ensuring data accuracy.

Habitat Corridors

Habitat Corridors

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Linear geographic features that connect separate habitats, supporting biodiversity and ecological processes by allowing species movement and gene flow.

Hazard Map

Hazard Map

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A map illustrating areas at risk from natural disasters or environmental hazards, used in disaster management and spatial risk analysis.

Hazard Vulnerability Analysis

Hazard Vulnerability Analysis

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A systematic approach to assess the potential risks and vulnerabilities associated with various hazards in a specific area, supporting emergency planning and spatial risk assessment.

Health Facility Accessibility

Health Facility Accessibility

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The spatial analysis of how easily individuals can reach healthcare services, considering geographic proximity and transportation networks.

Heatmap Creation

Heatmap Creation

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The process of generating maps where data density or intensity is represented by colour gradients, widely used for visualizing spatial patterns and concentrations.

High-Density Data Visualization

High-Density Data Visualization

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Techniques for displaying large and complex spatial datasets in a clear and interpretable way, often involving specialized mapping or charting methods.

Hillshade Mapping

Hillshade Mapping

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A technique that simulates the effects of light and shadow on terrain surfaces, enhancing the visualization of elevation and landform features in spatial analysis.

Horizontal (Datum/Control)

Horizontal (Datum/Control)

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Refers to the network of known horizontal geographic positions used as references for mapping and spatial accuracy.

Hub (Transportation Hub)

Hub (Transportation Hub)

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A node in a network (such as a city or station) used to channel goods or people, crucial for network analysis and optimizing transportation systems.

Human Geography

Human Geography

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The branch of geography focused on the spatial aspects of human activities, cultures, and interactions with the environment, often analysed using GIS tools.

Human Geography GIS

Human Geography GIS

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The application of GIS technology to study and analyse spatial patterns and processes in human geography, such as population distribution or urbanization.

Hydraulic Modelling

Hydraulic Modelling

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The use of mathematical models within GIS to simulate water flowthrough natural or built environments, critical for flood risk, drainage, and hydrological studies.

Hydrographic Features

Hydrographic Features

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Physical components related to water bodies (rivers, lakes, seas, etc.) represented in GIS for spatial analysis of aquatic environments.

Hydrography

Hydrography

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The geographic representation and analysis of water bodies such as lakes, rivers, and streams, fundamental for hydrological modelling and watershed analysis.

IDW (Inverse Distance Weighting)

IDW (Inverse Distance Weighting)

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A common interpolation method where values at unknown points are estimated based on the values of nearby known points, weighted by distance (inferred from standard GIS usage).

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