[New Page] Map tiles

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Re: [New Page] Map tiles

Postby kentsmith9 » Thu Apr 03, 2014 3:12 pm

sketch wrote:Nothing there on time-based restrictions, at least TBSRs? Does "turn restrictions" encompass TBTRs?

I was pretty sure all restrictions were the same, but I will confirm and specifically Segment Restrictions.
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Re: [New Page] Map tiles

Postby sketch » Thu Apr 03, 2014 3:06 pm

Nothing there on time-based restrictions, at least TBSRs? Does "turn restrictions" encompass TBTRs?
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Re: [New Page] Map tiles

Postby kentsmith9 » Thu Apr 03, 2014 2:14 pm

I received feedback on all the open questions on that page for what updates the tiles. I have moved them to the appropriate section on that page.

I also received feedback on the general update cycle and it is not necessarily 10% per cycle, so they recommended we add it takes about 10+ days to update all the tiles. Not every server is the same and they are not always the same themselves. I think the information is good enough for our purposes.

I need to fill out the theory of operation section. I was going to discuss the general theory behind map tiles, but I could not find any information on tile sizes and if the other layers are the same sizes. Does anyone know that data, or should I ask them?
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Re: [New Page] Map tiles

Postby sketch » Wed Mar 26, 2014 1:08 am

Sounds good to me.


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Re: [New Page] Map tiles

Postby kentsmith9 » Wed Mar 26, 2014 12:55 am

Ah. I hope that is the case as it would at least solve all update problems within 10 updates. If someone remembers that thread or details and can comment here, I can add it to this Wiki page.

To isolate that condition from the test, would it be possible to repeat your same list of test locations immediately after they update? Then if they take 10 days to update again, we know the answer.
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Re: [New Page] Map tiles

Postby sketch » Tue Mar 25, 2014 11:12 pm

I don't remember, but I believe it was within the past few weeks. Probably between 1-3 weeks ago. I couldn't find anything with a Google site search, so it may have been in a Champs forum.

From what I understand, the 10% tile update process updates 10% of all tiles with each update, in case any changes that wouldn't force a tile update have been made to the map (say, time-based restrictions). So, if I update a tile to test tile update triggering, there's presumably a 10% chance my results will be irrelevant.
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Re: [New Page] Map tiles

Postby kentsmith9 » Tue Mar 25, 2014 10:55 pm

I look forward to those test results.

sketch wrote:This is harder to test with any certainty now that the 10% tile update process has been implemented (right?).

I am not familiar with this. Is there a thread on this? I could not find anything. It sounds like something we should get added to the Wiki though.
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Re: [New Page] Map tiles

Postby sketch » Tue Mar 25, 2014 7:07 pm

I changed a road name on March 23; the last tile update for NA is to March 22 22:00 UTC, so I'm waiting on that to test.

I just made a few changes at various shopping malls to test the landmarks — on one, I changed the landmark name; on another, I changed the landmark geometry; on a third, I removed the (nonstandard, I know) parking lot road names. Once the relevant tile update goes through I'll check them all.

This is harder to test with any certainty now that the 10% tile update process has been implemented (right?).
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Re: [New Page] Map tiles

Postby sketch » Mon Mar 24, 2014 3:27 pm

kentsmith9 wrote:
sketch wrote:I'm confident that geometry, street name, and landmark changes will trigger tile updates. I've heard suspicions that time-based segment restrictions will not.

Good feedback. I assume your confidence on "street name" is based on actual map field (yours or someone else) testing. I am curious because I was thinking at one point I tried changing the name fields of a road and that did not trigger the update, but it did not make sense to me. So if you know that change alone will trigger the update, I am good with that.

For landmark changes, are you grouping 1) geometry changes, 2) entire landmark shifting, and 3) any edits to the name fields as all individually able to trigger a tile update?

Since the landmarks are on a different layer than roads, do we "know" any layer change that triggers a tile update will update all layers?

Others have reported that tweaking geometry is an effective way of getting time-based restrictions to take effect on the next tile update.

Honestly, I may be mixing experience and conjecture, but I would imagine that anything that would actually visibly affect a tile (so, geometry, names, and road type) would lead to a tile update. (I know for a fact that road type does it, at least.) It seems that even landmark type can have an effect if the type change leads to a color change in the client — something in the infrastructure made it so "River / Stream" are sent to the client as a grey landmark rather than as a blue one, and when I noticed and routed through a number of affected tiles, they were all changed.
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Re: [New Page] Map tiles

Postby kentsmith9 » Mon Mar 24, 2014 5:03 am

Doesn't seem likely. We were doing some edits on landmarks so huge it would take seconds to render the image each time we edited it. I swapped out a landmark with too many geo nodes for the Grand Canyon and drew in a new one. There are no roads in the area, so only the landmark itself could have caused all those tiles to update.

I think you may have run into an anomaly.
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