Report zero altitude tracks as on ground

jvde-github / ais2adsb

Simple script to convert AIS NMEA to ADSB basestation format. Main purpose is to plot SAR helicopters in ADSB plotting software like VRS.

GNU General Public License v3.0

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Report zero altitude tracks as on ground #14

Closed ianrenton closed 3 months ago

ianrenton commented 3 months ago

When outputting ship tracks, the SBS "is on ground" flag is set to 0, whereas I think it would make more sense to send them as "on ground". This PR sets "on ground" to 1 for any track with a zero or missing altitude.