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UAS Applications in Real Estate and

Land DevelopmentPresented by:

Mary B. Wohnrade, P.E., Principal EngineerKyle B. Reeder, P.E., Project Manager/Project Visualization

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Wohnrade Civil Engineers, Inc. CORPORATE HISTORY • Established Civil Engineering Consulting Firm based in Broomfield, Colorado

• Registered as a Colorado Corporation on November 4, 2002

• Specialties include: land development, municipal projects, floodplain management and water resource design.

• FAA Certified UAS Operator

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WCE Firsts• An Early Adopter of UAS Technology

• One of the first few UAS operators in Colorado to receivean FAA Section 333 Exemption and COA to performcommercial operations;

• One of the first licensed UAS operators to receive nationalrecognition of historic achievement for performing a precision mapping missionin a National Park;

• One of the first to incorporate UAS data into civil engineering design, and now virtual reality;

• One of 9 Honorees worldwide in the Inaugural 2017 Women to Watch in UAS by Drone 360 Magazine and Women and Drones;

3D Point Cloud of the Star Dune at the Great Sand Dunes National ParkCollected and prepared by Wohnrade Civil Engineers using sUAS

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The Best UAS Aerial Mapping

Data Available

The Best UAS Aerial Mapping

Data Available

Collection and Processing by OSHA trained FAA Licensed

Pilots

Collection and Processing by OSHA trained FAA Licensed

Pilots

Licensed Engineers and

Surveyors

Licensed Engineers and

Surveyors

ASPRS Strict Accuracy Standards

ASPRS Strict Accuracy Standards

Use the best Available

Drones and Sensors

Use the best Available

Drones and Sensors

In-House Cross-Trained Staff of

Engineers, Pilots and GIS Technicians

In-House Cross-Trained Staff of

Engineers, Pilots and GIS Technicians

Processing Workflows

Vetted by CU Denver Staff

Processing Workflows

Vetted by CU Denver Staff

• Pioneers in the Development of Precision UAS Mapping

• The culmination of years of refinement

The WCE Standard• All Services are

Performed In-House by Cross-Trained Staff

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WCE Drone Division

Aircraft & Sensor

Selection

Flight Planning & Execution

Processing Software

• Safely and successfully mapped thousands of acres throughout Colorado since early 2015• The Aircraft, the Sensors, and the Processing Software all matter when preparing precision mapping• As accurate as you can get using the best available UAS technology.

• A few Key Components to Successful Precision Mapping Include:

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Fleet DiversityMulti-Rotor - Fixed-Wing - Helicopter

Large Areas Heavy Lift3D Modeling

$,$$$ $$,$$$ $$$,$$$

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Strengths• Maneuver in Tight Areas• High Winds• 3D Data Capture• Topographic mapping up

to 150 acres

Weaknesses• Cybersecurity Concerns• Firmware updates• Limited flight time

Our PlatformsDJI Inspire 2

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Strengths• Maps up to 1-square

mile areas• High Endurance• Corridor Mapping• Cybersecurity• Flight management

system

Weaknesses• Mountainous terrain • Needs Room to

Maneuver and Land

Our PlatformsBlack Swift S1

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Strengths• Simultaneous Collection

of LiDAR and Imagery• Heavy Lift Capacity• Topographic mapping • Suited for Mountainous

Terrain and Highly Vegetated Areas

Weaknesses• Very Expensive• Limited Endurance

Very few platforms of this caliber in the U.S.

Our PlatformsAltus ORC2

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• Autonomous Flight• Offline Capability• Intuitive User Interface• Save flight plans for

reuse later• Collects thousands of

Photos;• Cybersecurity

o Datalink encryption

Flight Management Systems Typical Features:

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Construction Monitoring Cut and Fill AnalysisAerial Photography and

Videography

• Generated with consumer grade drones;• Very little flight planning, processing, piloting, and GIS experience required;• No surveyed ground control required.

Standard Applications

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Topographic Mapping LiDAR Mapping Virtual Reality

• Generated using advanced sensors, professional grade platforms, and surveyed ground control.• Surveying, data collection, processing, and GIS experience required.• Products are geolocated in state or local coordinate systems.

Advanced Applications

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WCE Precision UAS Mapping Services:Services Provided from August 2018 through December 2018

Total Area of Interest= 182 acres38 GPS Surveyed Ground Control Points

Northwater Treatment Plant

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Superior Data as compared to Traditional Ground and Aerial Surveys

• Topographic Mapping at a 1-foot Contour Interval

• Horizontal and Vertical Accuracy is at or near Survey-Grade, which is 0.1-foot horizontally and vertically

• High-Resolution Orthomosaic Image w/ 1” Pixel Resolution

• 3D Point Cloud with 24,027,418 Points with each Point Representing 1 square inch on the Ground

• 4k Video

All mapping was georeferenced and delivered in the Ralston Coordinate System

Northwater Treatment PlantEngineering Grade Deliverables

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Superior Data QualityAs Compared to Traditional Aerial and Ground Surveys

3D POINT CLOUD- UAVs vastly reduce data capture costs and appreciably increase data quality and richness

- Point Cloud Contains 222,319,447 points- Provides a Compete Representation of the Ground Surface

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WCE Compatible Workflows• We don’t simply collect and deliver data.• As engineers we can post-process the data and deliver it in virtually any format, and any

coordinate system.• This is what sets us apart from other traditional UAS operators

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VerticalAccuracy Class

Absolute Accuracy

RMSEzNon-Vegetated

(cm)

NVA at 95% Confidence Level

(cm)

VVA at 95th

Percentile(cm)

1-cm 1.0 2.0 3

2.5-cm 2.5 4.9 7.5

5-cm 5.0 9.8 15

10-cm 10.0 19.6 30

15-cm 15.0 29.4 45

20-cm 20.0 39.2 60

33.3-cm 33.3 65.3 100

66.7-cm 66.7 130.7 200

100-cm 100.0 196.0 600

ASPRS StandardsVertical Accuracy

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Horizontal Accuracy Class RMSEx and RMSEy (cm)

RMSEr(cm)

Horizontal Accuracy at the 95% Confidence Level

(cm)

0.63 0.9 1.5

1.25 1.8 3.1

2.50 3.5 6.1

5.00 7.1 12.2

7.50 10.6 18.4

10.00 14.1 24.5

12.50 17.7 30.6

15.00 21.2 36.7

17.50 24.7 42.8

ASPRS StandardsHorizontal Accuracy

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GPS SURVEYED CHECK POINT VS ORTHOMOSAIC IMAGE

How Accurate is Drone Mapping?

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Buyer BewareDrone Operator Capability

• Not All Operators are Capable of Producing Engineering-Grade UAS Mapping• Multi-million Dollar Construction Projects Demand the Best UAS Mapping Available

Multi-million dollar design and construction projects demand engineering-grade UAS Mapping

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“I must say, I was very impressed with your work and very pleased to find a group who really understands how GIS, survey and reality capture come together in the civil engineering field.”

Mark KauffmanTechnical LeadProject Visualization

Project VisualizationCombine Drone Data with Civil Engineering Design and Virtual Reality

Provides Value Throughout the Project Life Cycle

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Benefits of using accurate 3D Data, from UAS in Due Diligence & Civil Engineering Design for Project Visualization:• Virtual Site Visits• Identify Conflicts• Avoid Obstacles• Mitigate Headaches• Save Costs to Pay for Fees

Due Diligence & Civil Engineering DesignRiverbend Estates Subdivision

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Public Engagement & ApprovalAugmentation Pond – Private Landowner – Phase 1

Benefits of using accurate 3D Data, from UAS in Virtual Reality (VR) for the Public Engagement and Approval Phase of Projects:• Perception is Facilitated• Critical Feedback Emerges• Concerns Alleviated• Property Agreements & Easements

Streamlined

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Client/Stakeholder EngagementJurisdictional Dam – Private Landowner – Phase 2

Benefits of using accurate 3D Data, from UAS in Virtual Reality (VR) for the Client/Stakeholder Engagement Phase of Projects:• Sense of Place is Provided• Sense of Time is Understood• Project Vision is Embedded• Construction Approval is Accelerated

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ASSESS

PLAN

DESIGNBUILD

OPERATE

MAINTAIN

3D, 4D, 5D &

Integrated Modeling

Accurate 3D Data & the Project Lifecycle

Combining Drone Data with Civil Engineering Design and Virtual RealityProvides Value Throughout the Project Life Cycle

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October 19, 2016 – Top of the Star Dune at Great Sand Dunes National Park & Preserve

Questions and Answers

• Civil Engineering Services:o Due Diligenceo Highway Designo Stormwater Managemento Floodplain Modelingo Land Developmento Construction Management

• Unmanned Aerial Survey Services:o Precision Photogrammetric Mapping Serviceso UAS to Engineering Workflow Consultingo LiDAR Mapping Serviceso UAS Program Implementation Consulting

Contact Info: Mary B. Wohnrade, P.E.mary@wcecivil.comwww.wcecivil.com

GSDNP Staff Accolades

“Definitely the best imagery of the dunes to date”

–Andrew Valdez, NPS Geologist

WE ARE HERE TO HELP Take advantage of our expertise as a

preeminent UAS service provider.

We provide engineering grade data you can trust

Shaping the Future of Engineering