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Author Topic: [-] Wrong circle calculation (and thus demand calculation)  (Read 306 times)

Offline Tha_Ape

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GW#4

SIN-TXL has oversupply compared to demand.
SIN-SXF has undersupply compared to demand.

Still, the HC stays in SXF and doesn't move to TXL where it could be served. So I investigated.

It appears that TXL is at 7 infra 8 traffic and SXF at 7 infra 7 traffic. Despite this, SXF has a larger catchment circle than TXL...

Pic: highlighted circle is TXL, well within the larger circle of SXF.

https://www.airwaysim.com/game/Routes/Airport/EDDT/?e=1
https://www.airwaysim.com/game/Routes/Airport/EDDB/?e=1
« Last Edit: May 28, 2019, 10:09:46 AM by Sami »

Offline Sami

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Re: Wrong circle calculation (and thus demand calculation)
« Reply #1 on: May 19, 2019, 08:26:21 AM »
Catchment areas change slowly, and not instantly when the airport specs change. So most likely not a bug.

Offline Tha_Ape

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Re: Wrong circle calculation (and thus demand calculation)
« Reply #2 on: May 19, 2019, 08:41:12 AM »
Catchment areas change slowly, and not instantly when the airport specs change. So most likely not a bug.

As for the demand values, I could agree (can't access the data, and anyway wouldn't know how to interpret it). However, the circles should change instantly, right? And right now a smaller airport has a larger circle.

Edit: and even if so, meaning TXL just got an infra upgrade and its circle hasn't grown yet, it would be wrong: it would be based on a 7+7, and thus both airports should have the same circle (as SXF is also 7+7).
« Last Edit: May 19, 2019, 08:46:39 AM by Tha_Ape »

Offline Tha_Ape

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Re: Wrong circle calculation (and thus demand calculation)
« Reply #3 on: May 28, 2019, 10:03:25 AM »
I just copy-pasted EDDB's circle above EDDT's circle with updated values, and they match perfectly, despite EDDT being at 7+8 and EDDB at 7+7.
So slightly better than before, but still off.

Offline Sami

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Re: Wrong circle calculation (and thus demand calculation)
« Reply #4 on: May 28, 2019, 10:09:42 AM »
GW#4: EDDB radius 116km, EDDT radius 116km.

Radius updates monthly, or if there are some changes like airport relocations, and next calculation round will update EDDB to 116 km and EDDT to 132 km.

So no bug here... But changed the calculation to 3x monthly instead of 1x monthly.
« Last Edit: May 28, 2019, 10:12:12 AM by Sami »

Offline Tha_Ape

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Re: Wrong circle calculation (and thus demand calculation)
« Reply #5 on: May 28, 2019, 10:33:57 AM »
GW#4: EDDB radius 116km, EDDT radius 116km.

Radius updates monthly, or if there are some changes like airport relocations, and next calculation round will update EDDB to 116 km and EDDT to 132 km.

So no bug here... But changed the calculation to 3x monthly instead of 1x monthly.

Sorry to insist, but my previous data was gathered 10 real days ago (way more than 1 game month ago), and gave the same 7+7 vs 7+8 data for both airports = no really recent change.

There has been the closing of Templehof, indeed, but should have been recalculated since then as well.

And as per my previous post from may the 19th at 09:41 AM:
And even if [the circles should change instantly], meaning TXL just got an infra upgrade and its circle hasn't grown yet, it would be wrong: it would be based on a 7+7, and thus both airports should have the same circle (as SXF is also 7+7).

As previously Tegel had a smaller circle despite having higher values than Schönefeld.

Edit: meaning, a 1 degree discrepancy would be fine (time needed to update), but previously there was a 2 degree discrepancy, which is not normal. And right now there's "only" a 1 degree discrepancy, but long after the update should have been made.
« Last Edit: May 28, 2019, 01:27:15 PM by Tha_Ape »

 

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