Identifying proper lag size and number of lags when calculating semivariogram on mixed land use raster imagery

Authors: Sarah Becker*, United States Army Engineer Research & Development Center, Susan Lyon, United States Army Engineer Research & Development Center, Megan Maloney, United States Army Engineer Research & Development Center, Nicole Wayant, United States Army Engineer Research & Development Center
Topics: Spatial Analysis & Modeling, Remote Sensing
Keywords: semivariogram, lag, lag size, raster, heterogeneous land covers
Session Type: Poster
Day: 4/4/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded


The objective of this research is to develop a method to make an informed determination of what lag size and number of lags to choose in calculating a semivariogram on raster imagery containing multiple land covers. Researchers often calculate semivariograms on imagery containing uniform land covers and less often calculate semivariograms on imagery containing multiple land covers. They choose a lag size and number of lags based on a fraction of transect length of the image or otherwise choose arbitrary lag parameters without explanation. This is a problem because differences in lag size in imagery containing disparate land covers can widely affect the resulting semivariogram range value, which is then used to describe spatial variation or object size within the image. This research explores approaches to determining a best lag size and number of lags to use with imagery containing heterogeneous land covers.

Abstract Information

This abstract is already part of a session. View the session here.

To access contact information login