The purpose of this project is to compare LiDAR data collected with Ilris and DynaScan to GPS (RTK) points.

1. DynaScan Point Validation
Sammy Barnard

2. Work Flow Chart
Field
Collection
• RTK
• Ilris
• MDL DynaScan
Post
Processing
• Roll
• Pitch
• Heading
Data
Export
• ASCII
• LAS
Validation
• ArcMap
• Excel

3. Field Collection
• RTK
• Ilris
• MDL DynaScan

4. Project Data
DynaScan
Ilris
RTK

5. Data Export
QPD
ASCII
LAS

6. Create LAS
Dataset
•Convert LAS (.las) created in TerraScan to file type that can
be viewed and processed in ArcMap (.lasd)
LAS Dataset
to Raster
•Convert LiDAR points to a raster (grid)
•Changed in order apply values to entire
field
Extract
Values to
Points
•Assign raster values to GPS points
Add Field •Additional field for elevation difference
Field
Calculator
•Elevation - Extracted
Value (RTK points)
Export
Individual
Transects
Methodology

7. Results

8. Calibration Lines as Grids
Line 1 Line 2 Line 3

9. Methodology
Point Easting Northing Separation (m) Distance Seaward (m) Elevation ILS_20_DEM ILS_20_GPS L_All_DEM L_ALL_GPS
TRAN40004 492759.77 5071448.60 0.00 0.00 5.11 5.16 -0.05 4.93 0.18
TRAN40005 492759.98 5071449.12 0.56 0.56 4.62 4.80 -0.18 4.48 0.14
TRAN40006 492759.90 5071450.17 1.05 1.61 4.31 4.40 -0.09 4.19 0.12
TRAN40007 492759.92 5071451.27 1.10 2.71 3.85 4.08 -0.23 3.80 0.05
TRAN40008 492760.17 5071452.52 1.28 3.98 3.14 3.19 -0.05 2.98 0.16
TRAN40009 492760.21 5071453.29 0.77 4.75 2.68 2.56 0.12 2.58 0.10
TRAN40010 492760.17 5071453.92 0.63 5.38 2.00 2.00 0.00 1.77 0.23
TRAN40012 492759.77 5071457.68 3.79 9.17 1.59 1.60 -0.01 1.44 0.15
TRAN40013 492759.58 5071459.79 2.12 11.29 1.51 1.50 0.01 1.37 0.14
TRAN40014 492759.65 5071462.66 2.86 14.15 1.22 1.21 0.01 1.10 0.12
TRAN40015 492759.79 5071465.63 2.97 17.13 1.04 0.99 0.05 0.89 0.15
L1A_DEM L1A_GPS L1B_DEM L1B_GPS L2A_DEM L2A_GPS L2B_DEM L2B_GPS L3A_DEM L3A_GPS L3B_DEM L3B_GPS
5.12 -0.01 5.08 0.03 5.19 -0.08 5.16 -0.05 4.93 0.18 5.14 -0.03
4.63 -0.01 4.60 0.02 4.58 0.04 4.63 -0.01 4.48 0.14 4.75 -0.13
4.28 0.03 4.21 0.10 4.25 0.06 4.27 0.04 4.19 0.12
3.91 -0.06 3.73 0.12 3.77 0.08 3.89 -0.04 3.83 0.02 3.90 -0.05
3.03 0.11 3.01 0.13 3.01 0.13 3.02 0.12 2.98 0.16
2.37 0.31 2.35 0.33 2.44 0.24 2.36 0.32 2.60 0.08 2.78 -0.10
1.87 0.13 1.86 0.14 1.85 0.15 1.86 0.14 1.77 0.23 1.93 0.07
1.50 0.09 1.45 0.14 1.49 0.10 1.47 0.12 1.42 0.17 1.53 0.06
1.42 0.09 1.42 0.09
1.15 0.07 1.09 0.13 1.13 0.09 1.17 0.05
0.97 0.07 0.93 0.11 0.93 0.11 0.97 0.07 0.89 0.15 1.01 0.03

10. 0.00
1.00
2.00
3.00
4.00
5.00
6.00
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00
ElevationCGVD28(m)
Distance seaward (m)
Elevation
Elevation ILS_20_DEM L_All_DEM L1A_DEM L1B_DEM L2A_DEM L2B_DEM L3A_DEM L3B_DEM
-0.30
-0.20
-0.10
0.00
0.10
0.20
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00
Residuals(m))
Distance Seaward (m)
Residuals
ILS_20_GPS L_ALL_GPS L1A_GPS L1B_GPS L2A_GPS L2B_GPS L3A_GPS L3B_GPS
Transect 1

11. 0.00
1.00
2.00
3.00
4.00
5.00
6.00
0.00 5.00 10.00 15.00 20.00 25.00
ElevationCGVD28(m)
Distance Seaward (m)
Elevation
Elevation ILS_20_DEM L_All_DEM L1A_DEM L1B_DEM L2A_DEM L2B_DEM L3A_DEM L3B_DEM
-0.20
-0.10
0.00
0.10
0.20
0.30
0.00 5.00 10.00 15.00 20.00 25.00
Residuals(m)
Distance Seaward (m)
Residuals
ILS_20_GPS L_ALL_GPS L1A_GPS L1B_GPS L2A_GPS L2B_GPS L3A_GPS L3B_GPS
Transect 2

12. 0.00
1.00
2.00
3.00
4.00
5.00
6.00
0.00 5.00 10.00 15.00 20.00 25.00
ElevationCGVD28(m)
Distance Seaward (m)
Elevation
Elevation ILS_20_DEM L_All_DEM L1A_DEM L1B_DEM L2A_DEM L2B_DEM L3A_DEM L3B_DEM
-0.40
-0.20
0.00
0.20
0.40
0.60
0.00 5.00 10.00 15.00 20.00 25.00
Residuals(m)
Distance Seaward (m)
Residual
ILS_20_GPS L_ALL_GPS L1A_GPS L1B_GPS L2A_GPS L2B_GPS L3A_GPS L3B_GPS
Transect 3

13. 0.00
1.00
2.00
3.00
4.00
5.00
6.00
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00
ElevationCGVD28(m)
Distance Seaward (m)
Elevations
Elevation ILS_20_DEM L_All_DEM L1A_DEM L1B_DEM L2A_DEM L2B_DEM L3A_DEM L3B_DEM
-0.30
-0.20
-0.10
0.00
0.10
0.20
0.30
0.40
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00
Residuals(m)
Distance Seaward (m)
Residuals
ILS_20_GPS L_ALL_GPS L1A_GPS L1B_GPS L2A_GPS L2B_GPS L3A_GPS L3B_GPS
Transect 4

14. Summary of Statistics
Delta Mean Standard Deviation
Ilris -0.06 0.07
All Calibration Lines 0.14 0.07
L1A 0.07 0.07
L1B 0.10 0.07
L2A 0.05 0.10
L2B 0.09 0.07
L3A 0.14 0.11
L3B 0.02 0.09

15. Conclusion