Geographic Resource Solutions

  • Increase font size
  • Default font size
  • Decrease font size
Home Densitometer
GRS Densitometer

GRS is the designer and manufacturer of the GRS Densitometer (TM), a tool for the estimation of vegetation cover. The GRS Densitometer, when used with line-point transect sampling, combines horizontal and vertical vegetation sampling, thereby enabling the collection of resource information across the landscape (horizontally) at different canopy levels (vertically). This techniquedensitometere provides estimates of cover for any element in a forested environment such as: trees, shrubs, herbs, downed-woody material, fuels, and snags. This method of sampling has been shown to be accurate, objective, and repeatable be tween observers.

Please note that as of April of 2008, GRS began the production of a new version of the GRS Densitometer as show in the picture above.

TransIn is a program written specifically for GRS Densitometer transect data entry. Visit our TransIn page to download a FREE demonstration copy.

 

Who Uses the GRS Densitometer?

Those who that want to estimate vegetation cover accurately and efficiently!

Read more...
 

GRS Densitometer Purchase Information

The GRS Densitometer (TM) may be purchased in one of two ways:

  1. Contact GRS to purchase a GRS Densitometer directly from GRS or
  2. Contact one of our GRS Densitometer Resellers.

If you represent an education institution please contact us regarding our new GRS Densitometers for Education Program

Read more...
 

Sample Transect Data and Report

GRS uses the GRS Densitometer for collecting ground truth and accuracy assessment data in our land cover mapping projects.  We continue to expand the use of the point-transect sampling methodology by increasing the type of data we collect.   We have found point-transect sampling to be a fast, effective, and accurate method for collecting a wide variety of quantitative vegetation and ecological characteristics.  The following sample files contain the raw data and reports from a single transect collected in one of our recent land cover mapping projects Redwood National Park for the National Park Service.

Read more...
 

GRS Densitometer Users Guide

The GRS Densitometer (TM) is used with the point-transect method of sampling.  The point-transect samping requires the sampling technician to tally the existence of vegetation (and other cover conditions) at points along a transect. The GRS Densitometer allows the user to easily view the location of a transect point in the canopy to quickly determine if a tree crown is tallied or not.

Read more...
 




GSA# GS-10F-0451NESRI Consultant