@G-CPTN
there remains the discrepancy of the location of the border as interpreted by Turkey (and Russia)
Actually there was no map discrepancy in that earlier incident you linked to. Russia has owned up to it, stating that the incursion was due to a "navigational error".
It was unclear if the Russian aircraft actually crossed the Turkish border or only partly into the 5-mile buffer airspace imposed over Syria.
Unfortunately such "navigational errors" may have directly led to yesterdays shoot down.
Russia says violation of Turkish airspace was ‘navigation error’
(Oct 5) Russia has informed Turkey that the violation of Turkish airspace near the Syrian border on Oct. 3 was due to a “navigation error,” according to Russian sources.
Turkish military sources said a Russian SU-30 breached Turkish airspace for hundreds of meters in the southern district of Yayladağı in Hatay province for two minutes at 12:10 p.m., but returned to Syrian airspace after one warning.
The Russian authorities informed the Turkish military attaché in Moscow about the error, Russian Embassy officials in Ankara told Hürriyet Daily News. ...
Turkish Prime Minister Ahmet Davutoğlu warned that Ankara would activate military rules of engagement irrespective of who violates its air space.
"Our rules of engagement are clear whoever violates our air space," Davutoğlu told HaberTürk television after the incident.
Foreign Minister Feridun Sinirlioğlu has called his Russian counterpart, Sergei Lavrov, to lodge a protest. ...
A Turkish security official reportedly said Turkish radar locked onto the Russian aircraft as it was bombing early Oct. 2 in al-Yamdiyyah, a Syrian village directly on the border. He said Turkish fighter jets would have attacked if it had crossed into Turkish airspace.