Forest LiDAR Analysis Alexis Demitroff

Penn Swamp

Penn Swamp is part of Shamong, NJ

Part 1 QT Modeler

A total of 5 plots were A total of 5 plots were analyzed analyzed

PennEnclosedALLshape

Cross sections of the plot Cross sections of the plot were taken with 2.5m width were taken with 2.5m width

and 10m apartand 10m apart

PennEnclosedALLshape

Using Delunay Using Delunay Triangulation, the canopy Triangulation, the canopy

height of the plot was height of the plot was determined to be 9.54mdetermined to be 9.54m

PennmaturecedarEnclosedshape

Cross sections of the plot Cross sections of the plot were taken 2.5m width were taken 2.5m width

spaced 10m apartspaced 10m apart

PennmaturecedarEnclosedshape

Using delunay triangulation, Using delunay triangulation, the height of the canopy the height of the canopy was determined to be was determined to be

24.10m24.10m

PennSwampEnclosedLatinSQshape

Cross sections of the plot Cross sections of the plot were taken 2.5m width and were taken 2.5m width and

10m apart10m apart

PennSwampEnclosedLatinSQshape

Using delunay triangulation, Using delunay triangulation, the height of the canopy the height of the canopy was determined to be was determined to be

11.10m11.10m

PennSwampUnenclosedLatinSQShape

Cross sections of the plot Cross sections of the plot were taken 2.5m apart were taken 2.5m apart

spaced 10m apart spaced 10m apart

PennSwampUnenclosedLatinSQShape

Using delunay triangulation Using delunay triangulation the height of the canopy the height of the canopy was determined to be was determined to be

7.59m7.59m

PennUNenclosedshape

Cross sections of the plot Cross sections of the plot were taken 2.5m and 10m were taken 2.5m and 10m

apart apart

PennUNenclosedshape

Using delunay triangulation, Using delunay triangulation, the height of the canopy the height of the canopy was determined to be was determined to be

8.31m8.31m

Part 2 ArcMap

Sample plot areas • The forest was classified based on ground, high, medium and low

growth.

PennmaturecedarEnclosedshape

Overview

Study

DSM (digital surface model) is used to estimate the tree canopy level of Penn Swamp in Shamong, NJ. Variability across 5 plots will be analyzed with attention to tree height and density. Airborne LiDAR will provide the data for the study from the USGS “click” site.

Method and Analysis

Because different layers of analysis are to be used, 4 layers were imported into QT Modeler: both first return and ground layers for surface models (qtt) and point clouds (qtc). A mensuration line was created across each of the 5 study plots with cross sections taken on both sides. This is where a delunay triangle was created to determine canopy height. A Canopy Height Model was created by subtracting the highest point in the plot from the lowest point in the plot. This determined the estimate of canopy height and interpolated missing points for the plot. Forest height classification was performed in ArcMap.

Results

Cross sections of “ PennEnclosedALLshape” were taken 2.5m width and 10m apart. Using Delunay Triangulation, the canopy height of the plot was determined to be 9.54m. Cross sections of “PennmaturecedarEnclosedshape” were taken 2.5m width spaced 10m apart. Using delunay triangulation, the height of the canopy was determined to be 24.10m. Cross sections of “PennSwampEnclosedLatinSQshape” were taken 2.5m width and 10m apart. Using delunay triangulation, the height of the canopy was determined to be 24.10m. Cross sections of “PennSwampEnclosedLatinSQshape” were taken 2.5m width and 10m apart. Using delunay triangulation, the height of the canopy was determined to be 11.10m. Cross sections of “PennUNenclosedshape “ were taken 2.5m and 10m apart. Using delunay triangulation, the height of the canopy was determined to be 8.31m.

For the Arc Map analysis, each plot vegetation was classified on ground, high, medium, and low vegetation. It can be concluded that the ground is probably swamp. The maturecedarEnclosedShape plot was classified separately.