zcat edge.json.gz | grep ranga-moto | grep -A10 -B10 '1729004735'
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{"id":0,"type":"Feature","bbox":[-113.9924447,46.8716834,-113.9924447,46.8716834],"geometry":{"type":"Point","coordinates":[-113.9924447,46.8716834]},"properties":{"AccelerometerX":-0.9,"AccelerometerY":3.12,"AccelerometerZ":9.59,"Accuracy":1.2,"Activity":"Automotive","ActivityConfidence":100,"AmbientTemp":null,"BatteryLevel":0.57,"BatteryStatus":"unplugged","CurrentTripStart":"2024-10-15T13:41:31.331695Z","Distance":5528,"Elevation":964.2,"GyroscopeX":-0.02,"GyroscopeY":0.02,"GyroscopeZ":0,"Heading":287,"Lightmeter":53,"Name":"ranga-moto-act3","NumberOfSteps":5501,"Pressure":null,"Speed":2.27,"Time":"2024-10-15T15:05:49.814Z","UUID":"76170e959f967f40","UnixTime":1729004749,"UserAccelerometerX":-0.09,"UserAccelerometerY":-0.13,"UserAccelerometerZ":0.35,"Version":"gcps/v0.0.0+4","heading_accuracy":25,"speed_accuracy":1.8,"vAccuracy":1}}
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{"id":0,"type":"Feature","bbox":[-113.9926705,46.8717379,-113.9926705,46.8717379],"geometry":{"type":"Point","coordinates":[-113.9926705,46.8717379]},"properties":{"AccelerometerX":-0.95,"AccelerometerY":2.97,"AccelerometerZ":8.99,"Accuracy":1.7,"Activity":"Automotive","ActivityConfidence":100,"AmbientTemp":null,"BatteryLevel":0.57,"BatteryStatus":"unplugged","CurrentTripStart":"2024-10-15T13:41:31.331695Z","Distance":5546,"Elevation":964.2,"GyroscopeX":0.01,"GyroscopeY":0.02,"GyroscopeZ":0,"Heading":291,"Lightmeter":53,"Name":"ranga-moto-act3","NumberOfSteps":5519,"Pressure":null,"Speed":6.9,"Time":"2024-10-15T15:05:52.814Z","UUID":"76170e959f967f40","UnixTime":1729004752,"UserAccelerometerX":-0.2,"UserAccelerometerY":0.17,"UserAccelerometerZ":-0.39,"Version":"gcps/v0.0.0+4","heading_accuracy":8,"speed_accuracy":1.6,"vAccuracy":1}}
{"id":0,"type":"Feature","bbox":[-113.9927791,46.8717685,-113.9927791,46.8717685],"geometry":{"type":"Point","coordinates":[-113.9927791,46.8717685]},"properties":{"AccelerometerX":-1.08,"AccelerometerY":3.38,"AccelerometerZ":9.93,"Accuracy":1.9,"Activity":"Automotive","ActivityConfidence":100,"AmbientTemp":null,"BatteryLevel":0.57,"BatteryStatus":"unplugged","CurrentTripStart":"2024-10-15T13:41:31.331695Z","Distance":5555,"Elevation":964.2,"GyroscopeX":0.03,"GyroscopeY":0.04,"GyroscopeZ":0,"Heading":293,"Lightmeter":53,"Name":"ranga-moto-act3","NumberOfSteps":5528,"Pressure":null,"Speed":7.92,"Time":"2024-10-15T15:05:53.814Z","UUID":"76170e959f967f40","UnixTime":1729004753,"UserAccelerometerX":-0.24,"UserAccelerometerY":0.47,"UserAccelerometerZ":0.6,"Version":"gcps/v0.0.0+4","heading_accuracy":6,"speed_accuracy":1.4,"vAccuracy":1}}An aberrant break in a lap -- a drive home from a breakfast restaurant turned into two linestrings.
It was at a traffic light on Higgins, where we had actually stopped briefly (for less than 30 seconds).
Tippecanoe had a clustered=6 point near the break, and which I could not uncluster
with tippe settings at --maximum-tile-bytes 1000000.
We see in the source that there are 6 sequential points at (-113.9924033,46.871675|-113.9924033,46.871675).
I possibly have not handled the "sequential points on top of each other" case, so it could be a pseudo-stop (nap) that is getting filtered somewhere.
It is also possible that the TripDetector instance is new at this point;
in fact, I saw MotionStateReason: init there. So it's possible that
this break is attributable to PARALLEL_BATCH_SIZE.
Although it seems highly coincidental that the %100000 would fall
at this unique (?) stoplight.
Confirmed MotionStateReason: "init".
So the TripDetector is new.
So this is a seam in the pipeline,
and has to do with batching and program instantiation.
It is not a "sequential points on top of each other" problem.
Confirmed: re-ran the pipeline with a lower, non mod 100k batch size and indeed the spurious break was gone.
time env PARALLEL_JOBS=8 PARALLEL_BATCH_SIZE=80000 ./run.sh |& tee run.outia valid, tripdetected,naps,laps http://localhost:8080/public/?vector=,http://localhost:3001/services/ia/valid/tiles/{z}/{x}/{y}.pbf,http://localhost:3001/services/ia/tripdetected/tiles/{z}/{x}/{y}.pbf,http://localhost:3001/services/ia/laps/tiles/{z}/{x}/{y}.pbf,http://localhost:3001/services/ia/naps/tiles/{z}/{x}/{y}.pbf