Astro Public
  • Pilot's Operating Handbook
    • Getting Started
    • System Overview
    • Flight Part 1 - Flight Modes
    • Flight Part 2 - Operation
    • Flight Part 3 - Emergency / Advanced
    • Essential Software
      • Auterion Mission Control
        • AMC - Fly
        • AMC - Plan
          • Transfer Mission Plan and KML Files with Herelink
          • Terrain Follow
          • Offline Maps
        • AMC - Vehicle Setup
          • Advanced Vehicle Setup
          • Parameters
        • AMC - Photos
        • AMC - User Account
        • AMC - Settings
          • Advanced Mode
      • Auterion Suite / Flight Logs
      • Network and Connectivity
    • Pro Tips and Limitations
      • Travel and Shipping
  • Maintenance
    • FAQ & Troubleshooting
    • Software Updates
      • Updating Firmware
      • Astro Software v2.0 - What's New
      • Astro Software v1.7 - What’s New
      • Astro Software v1.4 - What’s New
      • Astro Software v1.2 - What’s New
    • Standard Maintenance Procedures
      • Getting Technical Support
      • Periodic Maintenance
      • Replacing Components
        • Replacing Propellers
        • Installing a SIM Card
      • Calibration and Tuning
      • Controller / Radio Binding
  • Other User Manuals
    • FREEFLY PAYLOADS
      • LR1 Payload
        • Payload Overview and Setup
        • Expansion Modules
          • LR1 Thermal Module
          • LR1 Distance Sensor
        • Mapping/Inspection/Video Workflow
        • LR1 Lenses and Expansion
          • Changing Lenses
            • Advanced Gimbal Tuning
          • Expansion Ports
        • What changed between A7R4 and LR1 Payload?
        • Technical Specs
        • LR1 Sample Mapping Data
      • A7R4 Payload
        • Packing, Handling, and Setup
        • Camera Controls
        • Mapping/Inspection/Video Workflow
        • Resetting Camera Settings
        • Calibration and Tuning
        • Technical Specs and Lenses
      • Ventus OGI Payload
        • Operating Handbook
          • Setting up Astro with OGI
          • Pre-flight Planning
          • Settings
          • Configure Gas Enhancement Mode
          • Advanced Operation
          • Downloading/Formatting Media
        • Protips, Limitations, and Troubleshooting
        • Technical Specs
      • Wiris Pro Payload
        • Operating Handbook
          • Setting up Astro with Wiris Pro
          • Pre-flight Planning
          • Advanced Operation
          • Inspection Workflow
          • Downloading Media/Example Output
          • Formatting Media
        • Protips, Limitations, and Troubleshooting
        • Technical Specs
        • Camera Software
        • Glossary
        • Integration for 3rd Party Applications
          • Mechanical Interface
          • Electrical Interface
          • Operational Limitations
      • Workflows/Maintenance/Updates
        • Installing/Removing Payloads
        • Mapping Workflow and Output
          • Pre-flight Planning
          • Mapping Efficiency Tips
          • Mapping Flight and Post Processing
          • PPK Software
          • Output Specification
          • Sample Mapping Data
        • Inspection Workflow
        • Gimbal Firmware
        • Gimbal Logs
        • USB Formatting
        • Isolation System
        • Precise/Smooth Gimbal Control
      • FPV Camera
    • 3RD PARTY PAYLOADS
      • Hovermap ST-X Lidar
        • Hovermap Setup on Astro
        • Mapping with Hovermap
        • Assisted/Autonomous Flight
      • Gremsy Pixy PE
      • Gremsy Vio
      • Sentera 6X/65R
    • ECOSYSTEM
      • Components
        • Batteries
        • Pilot Pro Controller
        • Herelink Handset (Legacy)
          • Herelink Controller Maintenance
            • Updating Herelink Software
            • Switching to Freefly Updater
            • Removing/Reinstalling the Herelink Cover
        • Vibration Isolators
        • GNSS Base Stations
      • Development Tools
        • MavSDK
        • Software Interfaces
        • Payload Mounting Interfaces
        • Electrical Interfaces
        • Onboard Computer
      • DIU Blue sUAS
      • FAA Remote Identification (RID)
      • Esri ArcGIS Flight (Site Scan)
        • 1 - Setup and Connecting to Astro
        • 2 - Preflight and Mission Planning
        • 3 - Flying a Mission with Astro
        • 4 - Post-Flight and Image Processing
        • Global Settings
      • DroneDeploy
    • SPECS AND INTERFACES
      • Technical Specs
      • Performance
      • Drawings and CAD
      • Compliance
    • Legal
Powered by GitBook
On this page
  • Directory structure on the USB drive is as follows
  • Folder name
  • Example output
  • Camera Calibration Parameters
Export as PDF
  1. Other User Manuals
  2. FREEFLY PAYLOADS
  3. Workflows/Maintenance/Updates
  4. Mapping Workflow and Output

Output Specification

High Res Mapping Payload Output Specification

The standard workflow for mapping with Astro takes photos from the camera, geotags them, and writes them to the attached USB stick. The usb stick will contain data from each flight in separate folders.

Photos can be saved to either SD card or USB drive. When photos are saved to the SD card, no geotag is applied. However, all other files will be written to USB drive if one is connected, as well as small thumbs of the RAW photos.

Directory structure on the USB drive is as follows

Folder name

Naming: <SequentialFlightNumber>_<DATE>_<TIME>

There may be multiple folders that start with the same <SequentialFlightNumber> if photos were taken on the ground but without a flight.

Each folder will contain the following:

Observation file: <SequentialFlightNumber>_<DATE>_<TIME>.obs

This file contains the GNSS observations from the aircraft's RTK GPS, and is used in conjunction with the base station data to precisely locate the astro in space. The file also includes RTKlib-style "marker" entries at the timestamp when each photo was taken

Photo capture information file: <SequentialFlightNumber>_<DATE>_<TIME>-sequence.json

This JSON formatted file includes the precise timestamp and gimbal angle for each photo captured.

Aircraft capture state information file: imagelog.json

This JSON formatted file includes the aircraft position, attitude, timestamp, and capture url for each photo taken.

Photo capture information file

Name: YYYY-MM-DD-[SequentialNumber matching directory].json

Photos

File type: JPG

Naming: per camera settings

Geotags: Each photo is geotagged in its EXIF header, including geographic position and altitude in WGS84 (GPS) coordinate frame. The altitude in the aircraft geotags is based on the EGM96 geoid.

Note that additional tag information may be written later when post processed by a PPK app.

thumb

This folder contains small 512x341 thumbnails of the photos taken. They are geotagged as well, and are sometimes useful to upload to a photo photogrammetry site such as ESRI sitescan to ensure that photos are geotagged as expected. They can even be used to create a quick, coarse map.

Example output

Note that Base Station observation files are also included in separate folders in case you'd like to perform PPK.

Camera Calibration Parameters

This is a set of example calibration values for the Sony A7R-IV with Sigma 24 mm lens, which can be used for photogrammetry initial conditions. The LR1 also matches this specification with the 24mm lens. Each lens is slightly different, but these values are good initial values if the software in use can't solve them directly.

Parameter
Value

Focal Length (mm)

24.351

Principle Point X (pixels)

4714.485

Principle Point Y (pixels)

3172.286

R1

-0.017

R2

0.071

R3

0.009

T1

0.001

T2

0

PreviousPPK SoftwareNextSample Mapping Data

Last updated 6 months ago

. These datasets have been copied from the USB drive attached to Astro.

Link to example datasets