Proximity Analysis


In real life, you often encounter cases like the following:

  • Which is the closest residence to the landslide?
  • Which are the two supermarkets within 2 km that are closest to the national stadium?
  • How to map the coverages of the telecommunication towers from strong to weak?
  • How many food production factories within 1000 meters of a polluted river stream?
  • There are two layers. One for football games avenues, the other for hotels. What is the distance from each hotel to the nearest avenue?

The above questions are all related to locations and distances. Proximity analyses provide functions to determine the proximity among multiple or between two features, including buffer analysis, Thiessen polygons, calculating distances, distance query, spatial query, etc.

Main Contents:

Theory on Constructing Thiessen Polygons

Constructing Thiessen Polygons

Applications of Constructing Thiessen Polygons

Theory on Distance Calculation

Calculate Distances

Applications of Distance Calculation

The Theory of Buffer Analysis

Sample Application for Buffer Analysis

Application Cases for Proximity Analysis