[Page Upate] Road Elevation

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Re: [Page Upate] Road Elevation

Postby nnote » Thu Dec 17, 2015 10:26 pm

In the example pic above, I'm not to fond of throwing two extra nodes on a freeways section just to make it +1 .... I'm not to fond of changing the elevation of a higher class segment between any nodes just to accommodate a lower class road.
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Mon Dec 14, 2015 12:40 pm

I think the clarification given in the seagull reference basically stated that there is no such thing as an underpass.

Both the roads shown in your example are above grade (no tunnels were built), but one is raised above the other.

The terminology of under/overpass is also very ambiguous. It's a matter of perspective if an interchange is an overpass or underpass. In your example:
If I'm on the freeway, then there is an underpass; if I'm on the street, it's an overpass.


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Re: [Page Upate] Road Elevation

Postby nzahn1 » Thu Dec 17, 2015 7:20 pm

nnote wrote:Considering we keep freeways at ground in all possible means, that to me is a tunnel.
I don't know what you mean here.
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Thu Dec 17, 2015 8:03 pm

Fredo-p wrote:
nzahn1 wrote:I don't know what you mean here.


He was referring to all freeways needing to be set to ground whenever possible.
Ah! Okay, I had never heard the rule before, so it didn't make sense to me.
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Fri Dec 18, 2015 12:53 am

nnote wrote:In the example pic above, I'm not to fond of throwing two extra nodes on a freeways section just to make it +1 .... I'm not to fond of changing the elevation of a higher class segment between any nodes just to accommodate a lower class road.

Can we present that situation to staff, and see what they are fond of?
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Wed Dec 23, 2015 12:54 pm

Fredo-p wrote:
robindlc wrote:Ground level. I do prefer to say 0 level. For me 0 level is the reference level. Set up by default. And for Spain we have decided that important roads such as freeways will keep this reference level 0. Any small road crossing it a different level will be +1 or -1 depending on its relative position to the 0 level road used as reference. This is to avoid as much junctions as posible in highways. We also have been told that the number of junctions do not affect the routing, but the possible mistakes yes.



This is actually how we map roads in Arizona. Elevation is set based on importance (Freeway, Highway, roads).

My only problem is this is not how things are currently shown on the livemap (which has become a stand in for what we can expect in the app). The livemap draws shadows under positive (+) elevations, and 'buries' negative (-) elevations.
If staff wants us to map differently than the only representation we have, they should tell us. So far we know the "tunnel" checkbox that will cause the 'buried' effect in WME, LM, and App. We don't know:
  1. Will negative elevations (continue to) be shown as buried?
  2. Will positive elevations (continue to) be shown as raised?
  3. Will roads be stacked according to elevations when rendered?

Until we know ^the answers to these^ crafting guidance seems premature.
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Wed Dec 23, 2015 5:33 pm

tonytx05 wrote:
Fredo-p wrote:The dash lines mean underground? I bet you if you polled as many waze users as you could, they wouldn't know what it meant nor care.


I think it's convention that dashed lines indicate the road is behind or under something, in this case the ground. Regardless, the representation implies there is a change of grade for those road segments when there is not.
It's a pretty common symbol in cartography:
Tunnel.png
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Re: [Page Upate] Road Elevation

Postby nzahn1 » Wed Dec 23, 2015 9:40 pm

I'd still like to see a staff member spell out their stance on those (and other) word of mouth interpretations.

I still don't know why your giving priority of mapping overlap based on road class/type rather than mapping the actual configuration of the roads. Especially since the default view of Waze is 3D.


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Re: [Page Upate] Road Elevation

Postby nzahn1 » Wed Dec 23, 2015 11:01 pm

I could say the same about mapping freeways to 0 despite passing over and under other roads that may have been at the same spot for a hundred years before the freeway was built.

Hell, I don't see any instruction what so ever from Waze saying to start mapping like this. It's unneeded and pointless.


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Re: [Page Upate] Road Elevation

Postby PesachZ » Sun Dec 13, 2015 1:22 am

Absolutely there should be some work on drafting an update. Any volunteers?

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