Geography

Document Type

Article

Abstract

Our manuscript presents Trajectory Analysis, which is a novel method to characterize patterns of gross changes during a time series of raster maps. This manuscript is our first article to elaborate on concepts and features of Trajectory Analysis that are necessary to analyze more than two time intervals. The method computes up to eight trajectories and three components of change: Quantity, Exchange, and Alternation. Quantity is the absolute net change between the two time points that bound the temporal extent. Exchange is the additional gross change between the same two time points. Alternation is the additional gross change that derives from gain and loss at the same location during the time series. An application illustrates the concepts by analyzing soybean cultivation during 32 time intervals in western Bahia, Brazil, where Alternation is the largest component of change at temporal resolutions of fewer than 4 years.

Publication Title

Transactions in GIS

Publication Date

12-2025

Volume

29

Issue

8

ISSN

1361-1682

DOI

10.1111/tgis.70169

Keywords

change, land cover, map, R package, time series, trajectory

Cross Post Location

Student Publications

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Download

Included in

Geography Commons

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.