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2020-05-31
, 20:58
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@ Ruhrgebiet, Germany
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#982
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I am okay with this as general speed limit!
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2020-05-31
, 21:19
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Posts: 479 |
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Joined on Jan 2012
@ Enschede, The Netherlands
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#983
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Originally Posted by rinigus
I guess Valhalla is limited to a byte, hence 255. Still, if I look at the road features OSM, it correctly lists the "maxpeed" as "none". But perhaps "none" is encoded as MAX_BYTE (==255) in the actual data. So I don't know what the origin of this "bug" is.
I wonder if Valhalla's import makes an educated guess and reduces the speed of light a bit. Not that its something round in mph either - 158.45 .
But there is an option to show the speed limit only if you exceed it, btw
[edit] Still this might be better that no indication at all, which could also mean "max speed: not specified / unknown".
Last edited by Fuzzillogic; 2020-05-31 at 21:28.
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2020-06-01
, 20:46
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Posts: 479 |
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Joined on Jan 2012
@ Enschede, The Netherlands
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#984
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There was a bug about maxspeed=none in Valhalla, and is fixed there. But, as expected, this is encoded as uint8_t / 255 in the data.
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2020-06-02
, 21:02
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Posts: 6,453 |
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Joined on Sep 2012
@ UK
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#985
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Originally Posted by Fuzzillogic
Are you sure it's not 4294967295 km/h?
the bug of course is that the speed limit there is not 255km/h, but 1079251985km/h.
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2020-06-02
, 23:43
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Joined on Apr 2012
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#986
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I suspect that on all current roads in the world, we can assume that the speed limit is not actually 255 km/h, and can treat that as "none".
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2020-06-03
, 00:12
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Joined on Aug 2010
@ Ruhrgebiet, Germany
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#987
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Originally Posted by pichlo
Pretty sure, as to keep that value we need four bytes. But not necessarily all bits set.
Are you sure it's not 4294967295 km/h?
But even if do we think it matters? Will we even notice travelling the longest possible route on earth?
The time used would be 33ms compared to 8ms.
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2020-06-03
, 06:28
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Joined on Aug 2016
@ Estonia
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#988
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Originally Posted by Fuzzillogic
The version that we use is a bit older, haven't updated it yet. Recently had issues with newer Valhalla versions and I am bit cautious with touching it. However, will have to do it at some point.
There was a bug about maxspeed=none in Valhalla, and is fixed there. But, as expected, this is encoded as uint8_t / 255 in the data.
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2020-06-03
, 07:33
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Joined on Jan 2012
@ Enschede, The Netherlands
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#989
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Originally Posted by rinigus
It looks the patch is (also) in Mjolnir, thus on the import-side of things. Could it be you've used a more recent version of Vahalla, including this patch, to import and convert the data from OSM?
The version that we use is a bit older, haven't updated it yet. Recently had issues with newer Valhalla versions and I am bit cautious with touching it. However, will have to do it at some point.
I guess it doesn't matter, and it's now clear that "255" means "maxspeed: none". This sign, appropriately the German sign, seems like a good indication in such cases.
Come to think of it, is there anywhere else in the world, except for the Autobahn, where there's no speed limit?
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2020-06-03
, 08:07
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@ Estonia
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#990
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Originally Posted by Fuzzillogic
That sign is used for "Limits as by default", including overtaking limits and such. As we don't have overtaking info processed (available?), I am not going to set it. So, you are stuck for now with 255
It looks the patch is (also) in Mjolnir, thus on the import-side of things. Could it be you've used a more recent version of Vahalla, including this patch, to import and convert the data from OSM?
I guess it doesn't matter, and it's now clear that "255" means "maxspeed: none". This sign, appropriately the German sign, seems like a good indication in such cases.
Come to think of it, is there anywhere else in the world, except for the Autobahn, where there's no speed limit?
. Alternative would be to show speed limit only if you are let's say approaching it with the delta of 100km/h?I did import data with newer Valhalla as it was otherwise failing to compile even.
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But there is an option to show the speed limit only if you exceed it, btw