Changeset: 52717295
modifying tunnel alignment based on NextBus geopositioning data
Closed by Nate Wessel
Tags
created_by | JOSM/1.5 (12712 en) |
---|---|
source | Bing |
Discussion
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Comment from KindredCoda
Geopositioning data does not work underground and is therefore inaccurate. My alignment was based on USGS topographic maps, please revert.
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Comment from Nate Wessel
"Geopositioning" was a bit of a slippery word for me to use. The data I was looking at obviously wasn't a satellite based GPS, because yeah, those don't work in tunnels, and this was very regular. About a dozen or more "GPS" traces followed more or less exactly the same path, which indicates to me that they were probably based on a known tunnel alignment plus some distance-based measure of a vehicle's progress through that tunnel.
I'll verify this with the GTFS data in a moment and report back.
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Comment from Nate Wessel
Your original alignment better corresponds with the GTFS data from the agency. There must be something wrong with the data I'm using. I will revert!
Best,
Nate -
Comment from Nate Wessel
I have reverted. Please verify that the data is now correct. Sorry for the bother!
Ways (4)
- Twin Peaks Tunnel (56042551), v10
- Twin Peaks Tunnel (56042561), v9
- Muni Metro / Twin Peaks Tunnel (160278866), v10
- Muni Metro / Twin Peaks Tunnel (160278870), v7
- 5154167879, v1
- 5154167880, v1
- 5154167881, v1
- 5154167882, v1
- 5154167883, v1
- 5154167884, v1
- 5154167885, v1
- 5154167886, v1
- 5154167887, v1
- 5154167888, v1
- 5154167889, v1
- 5154167890, v1
- 65321416, v9
- 703453778, v2
- 703453790, v2
- 1723333965, v2
- 1723333996, v2
703453779, v2703453789, v21723333914, v2
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