Difference between revisions of "Drone Meteorite Searching"
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| − | == Drone Image Survey Requirements == | + | |
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| + | == Main Survey Data Collection == | ||
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| + | === Drone Image Survey Requirements === | ||
* Ground resolution: 2 mm /pixel | * Ground resolution: 2 mm /pixel | ||
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''Note:'' | ''Note:'' | ||
| − | == | + | |
| + | === Survey strategy === | ||
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| + | When the data is processed, the oldest images are somewhat prioritised. | ||
| + | Hence the higher priority/probability areas should be surveyed first. | ||
| + | |||
| + | The simplest way to achieve this is to cut the search area polygon into 5-20 smaller polygons, depending on the size of the survey. | ||
| + | Try not to make the polygons too elongated. | ||
| + | |||
Revision as of 15:02, 14 November 2024
Contents
Introduction
Main Survey Data Collection
Drone Image Survey Requirements
- Ground resolution: 2 mm /pixel
- Overlap: 10%
- Minimum sun elevation: X degrees (to avoid long shadows creating too many false positives. Ignore if overcast). Use https://www.sunearthtools.com/dp/tools/pos_sun.php to calculate survey start/end times for your location.
- GPS tagging of the images (Exif)
- Timezone set to UTC
Note:
Survey strategy
When the data is processed, the oldest images are somewhat prioritised. Hence the higher priority/probability areas should be surveyed first.
The simplest way to achieve this is to cut the search area polygon into 5-20 smaller polygons, depending on the size of the survey. Try not to make the polygons too elongated.
Training Data Collection
Low-resolution Survey
(optional) Needed to make a background map of the survey area (used as a layer on slippy map on Webapp).
Data Collection
- Ground resolution: 5 cm /pixel
- Overlap: 70
Data Processing
- Upload and process the data on WebODM (cloud version).
- Download the data product: Orthomosaic (large geoTiff file).
- Upload geoTiff to Mapbox: https://studio.mapbox.com/tilesets/
- Wait for processing, note the Tileset ID, make sure it is public, and put that ID somewhere... TBD
WebODM setup
- feature-type: orb
- use-fixed-camera-params: enable
- sfm-no-partial: disable
- skip-3dmodel: enable
- skip-report: enable
- fast-orthophoto: enable
- dsm: disable
Meteorite Candidates Follow-up
Webapp Deployment
See deployment notes: https://github.com/desertfireballnetwork/dfn-meteorite-drone-webapp/tree/main/webapp
GPU machine Deployment
Heavy lifting jobs (Machine Learning training and inference) need a GPU desktop or beefy VM. This machine just needs to be connected to the internet, and will work as a slave wrt the webapp on the VM.
See install notes: https://github.com/desertfireballnetwork/dfn-meteorite-drone-webapp/tree/main/mldaemon
Checklists
Misc
Computer things
- Laptop + backup laptop. Linux distro, ~1TB free space, SD card reader.
- Starlink unit.
- Activate Starlink unit subscription that should be on pause (ask Hadrien).
- Spin-up Webapp VM.
- Start high-performance GPU computer (lab).
Power
- Generator.
- Petrol and/or diesel. Usage: ~X litres / 12h
- Battery station + cables.
Drone
- Drone.
- Drone camera.
- Drone controller.
- Batteries (charge them just before the trip).
- Battery charger.
- SD cards.
- Something to make a landing pad (e.g. tarp).
- stuff for making ground control points (for the low-res survey)
