Centre of Geographic Sciences Remote Sensing Field Camp 2015
1. Centre of Geographic
Sciences Remote Sensing
Field Camp 2015
Aerial Photography Collect of CoGS grounds
and
Faro Scanning of Annapolis Royal’s Sinclair Inn
Presentation By: Joli Densmore, Alex Graser, Kristy Nicoll, Ryan Poirier and Sean Wheeler
Prepared For: The Centre of Geographic Sciences and The Nova Scotia Heritage Society
2. Scope
Students from the 2015 Centre of Geographic Sciences Remote Sensing
Field camp will collect and process to an orthomosaic visible colour aerial
photographs of the grounds of the Centre of Geographic Sciences, Nova
Scotia using GoPro cameras at a minimum spatial resolution of 50cm by the
22nd of May 2015 for the purposes of mapping the grounds to within half of the
output rasters cell size in positional accuracy.
Concurrently, students from the 2015 Centre of Geographic Sciences
Remote Sensing Field camp will collect terrestrial LiDAR and process to a
georeferenced RGB point cloud and 3D model a building or structure to be
determined in Annapolis Royal, Nova Scotia using a Faro scanner at a
minimum point density of 10cm by the 22nd of May 2015 for the purposes of
providing measurable analytics between 2 - 5 centimetres accuracy..
3. Overview
● Aerial Photography Preparation
● Flying
● Post-Processing
● Final Production
● Validation
● The Sinclair Inn
● The Faro Scanner
● Scanning
● Post-Processing in Scene
● Post-Processing in Recap
● Post-Processing in other softwares
● Final floor plan
● Final 3d model
● Validation
● Total station (not sure where I should put this)
4. Overview - Aerial Photography Collect
Preparation (Sean/Kristy)
- Aerial photography collect
- - Study area
- How? (Go-Pro)
- determining the Area of Interest
- determining ground coverage of go-pros
- the laps (side/end)
- flight height
- computing flight lines
- Final Product - Garmin GPS integration
7. Overview - Flying the Aerial
Photography (Ryan/Kristy)
● How?
o Control Targets
o Android Option
o Garmin ultimately
o Bernie and his Ultralite
o Paul’s Go-Pro Rig
o Settings
o Following the flightlines
o Do we want to talk about taking the oblique photos?
8. The Camera Setup
GoPro 3+
GoPro 3
Taking a constant
video of the flights
Taking pictures every
half of a second
Taking pictures every
10 seconds
14. Faro Scanning the Sinclair Inn - Prep
(Alex/Sean/Ryan?)
Faro Scanner Overview
- Costs
- Learning how
- Pieces parts? (diagram maybe?)
- Include test data of boardroom?
- Maybe a comparison between the Faro and
last year’s scanner?
15. Faro Scanner Scanner Mirror
Scanner Mount
Reference areaPower button Touch screen
display
LED
Start / Stop
button
SD memory
card slot
Tripod
Power cable
BatteryScanner
USB card reader
Memory card
case
Charging cradle
lense cleaner
Scanner Mount
Sphere Targets
16.
17. Scan Post-Processing - Faro
Scene (Joli)
Scans are imported into FaroSCENE where colour is
applied to points and the scans are registered together.
registration of 3D scans can be done three different ways:
● Target based- using targets such as spheres and walls
the scans
● Cloud to cloud- using point clouds that are similar
and/or close together.
● Top based- using inclinometer to determine z-axis
18. Registration method
After much trial and error the best registration
method for the project was determined.
Top based registration was used to roughly place the scans,
then using the correspondence view the scans were moved
to more accurate positions. Then cloud to cloud registration
was run to more precisely tie the scans together.
19. After scans have been properly registered and
colour has been applied you can view the point
cloud in 3D.
In the correspondence view individual
scans can be manipulated so they fit
together better allowing the cloud to
cloud registration to work better.
20. Save and Export
Initial post processing has been completed:
1. colour has been applied to the points from the pictures
taken at the same time
2. scans have been properly registered together
3. any “noise” has been removed from the scan
The scans can now be saved and exported so they are ready
for the next step of creating a 3D model and 2D floor plan.
28. Total Station
To “walk” control from outside to
inside of the building.
Resection- the process of
determining the position of the
station by means of sights taken
toward known points.
Total
Station
Known
location
Known
location
Backsight
