APHUG 1.7

Vocabulary flashcards summarizing key spatial analysis models and geographic technologies from the lecture notes.

Gravity Model

A mathematical formula that predicts spatial interaction; calculates flows (e.g., transportation, migration) between two locations based on their populations and distance.

Uses of the Gravity Model

Estimating transportation flows, determining business market areas, and forecasting migrant volumes between places.

Purpose of Geographical Models

To visualize invisible spatial patterns and answer theoretical geographic questions.

Concentric Zone Model (Cost-Distance Application)

Urban model that can be adapted to graph real-estate price changes as distance from the city center increases.

Geographic Information Systems (GIS)

Computer programs (popularized in the 1970s) that store, analyze, and map multiple spatial data layers.

Data Layer (in GIS)

Individual set of spatial information (e.g., roads, elevation, land use) combined in GIS for analysis.

Global Positioning System (GPS)

Worldwide satellite network that provides precise location data through measurable radio signals.

Aerial Photography

Images of Earth captured from aircraft; traditionally on film but increasingly acquired with digital cameras.

Remote Sensing

Collection of Earth-surface data from satellites or aircraft using electronic scanners rather than direct contact.

Remote-Sensing Satellite Scanner

Computerized device aboard satellites that records electromagnetic data from Earth’s surface for analysis.