Aerial Mapping Adventures: Drone Workshop

Acme Design is a full service design agency.

— Greg Lang, GISP, Pierce County, WA

WA GIS Association Conference, Tacoma, WA          June 13, 2023

— Peter Keum, GISP, King County, WA

Schedule

Part I

Hardware

Mission Planning Software

1.1

Demo

Part II

Data Products

Analysis Topic Examples

1.1

Data Processing

RPAS as Platform

Multi-rotors

Fixed-wing & VTOL

• Shorter flight time (< 45 min)
• Cover smaller area
• Highly maneuverable
• Less expensive
• Access to confined spaces

• Long flight time (+ 40min)
• Covers very large area

(vertical take-off & land)

Remotely Piloted Aircraft System

 Sensors Payload

Multi-spectral  ~ $10 K

Thermal Infrared ~$8K

High resolution digital camera (100 MP) ~$40K

Lidar Camera

~ $15K

Methane Gas Detector ~$67K

Two Spaces for Drone

Outdoor

Indoor

Outdoor

Indoor

• No GPS signal
• Limits on speed and motion
• Manual flight control
• Tight spaces

Drone

GIS

Great Combo?

&

Great combo !

GIS & DRONE

Part I

Hardware

Mission Planning Software

1.1

Demo

1.2

Part 1.1: Hardware

1.3

Part 1.1: Hardware

1.4

Part 1.1: Hardware

Flight Control App  

• Fly Consistently for overlapping images
• Can fly manually but it's like mowing with scissors

Part 1.2: Mission Planning

Part I

Hardware

Mission Planning Software

1.1

Demo

Part I

Hardware

Mission Planning Software

1.1

Demo

Part II

Data Products

Analysis Topic Examples

1.1

Data Processing

Structure from Motion (SfM)

Part II: Data Processing 

Photogrammetry

Part II: Data Processing 

Data Processing

Input Sequences in DD

Ground Control Points

Increase accuracy of drone map

GCP's make your map accurate BUT do not let you know HOW accurate the map is.

Ground Control Points

RTK = Real-Time Kinematic

RTK with Mobile Base Station

RTK with NTRIP

NTRIP - Networked Transport of RTCM (internet protocol). 

Require Constant Internet connection (cell) or subscrption

Ground Control Points

GNSS Receivers with RTK + 

Esri FieldMap

Importance of Check Points

• Check points are physical markers in drone images where the precise GPS location is known
• Check Points give XYZ error in inches/cm with map products
• Single or average error does not guarantee the accuracy for all parts map

• GCP = map processing

• Check Points = calculating average errors

Part II

Data Products

Analysis Topic Examples

1.1

Data Processing

Data Products

EPSG Code - European Petroleum Survey Group

EPSG 4326: WGS 84, Longitude & Latitude Coordinate system 

EPSG 3857: Web Mercator Projection (Esri = 1984 Web Mercator Auxiliary Sphere)

EPSG 2926: NAD83 Washington North NAD83

Drone Photo Data

Part II

Data Products

Analysis Topic Examples

1.1

Data Processing

• Esri Dashboard with Survey123

GIS Integration

• AGO Web App

• AGO 3D Scene Viewer App

GIS Integration

DD 3D Model 

1. QGIS to georeference aerial imagery export to tiff file
2. Using GDAL
3. Or use mbutil to export into tiles

GIS Integration

• Create web-map using GitHub's gh-page

GIS Integration

DD GeoTiff -> gdal2tile.py -> tile folder

Drone Aerial Map on Website

Washington GIS Association Drone Special Interest Group

• Email Sign-up
• Resources

• Every 3rd Thursday
• ZOOM Meeting
• 148 Members

Thank You!

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