[OSRM-talk] osrm extract on a osm file created using a using BBox query

[Daniel Hofmann]

Down-sizing files with bounding-box queries is dangerous when not carefully
executed.

We had similar issues a few month ago that went like this:

When you do a simple bounding-box query, you do a hard cut through way
nodes at the borders, resulting in dangling node references in the OSM file.

What you instead have to do is the following:

- query for all nodes in your bounding-box
- query for the associated ways for those nodes
- now run through those ways and return all the way nodes

now your ways no longer have dangling references.

There is a tool to check for dangling references, `osmium check-refs`:
>
http://gis.19327.n5.nabble.com/Referential-Integrity-Problem-td5848030.html#a5848890

Which OSRM version are you on? I thought we made the dangling reference
issues harder to crash OSRM and instead throwing and error. Could you try
with the latest 4.8.1 release please?

On Mon, Sep 21, 2015 at 5:06 PM, Luc Van Linden <luc.vanlinden at gmail.com>
wrote:

> Hi
>
> We are currently testing the usage of OSRM (on windows using the published
> binaries) and the way the profile.lua file needs to be configured to
> minimise the resulting graph.
>
> We would like to understand which part of the lua file will actually
> "decide" if a specific element/tag/way is included in the graph.
>
> We have tested with afull belgian coverage. The standard profile.lua file
> works for extract/prepare and run.
>
> However when we use a small but substantial relevant subset of Belgium,
> using a BBOX, osrm_extract fails. A windows messagebox pops up, just a
> message saying the program osrm.extract has stopped working.
>
> This is the console output:
>
> [info] Input file: belgium-latest.osm.pbf←[0m
> [info] Profile: profile.lua←[0m
> [info] Threads: 4←[0m
> [info] Using script profile.lua←[0m
> [STXXL-MSG] STXXL v1.4.99 (prerelease/Release) (git
> f7389c79e946430f5e3f7efc15e5
> bcc29183d200) + gnu parallel(__GLIBCXX__)
> [STXXL-MSG] Disk 'd:\temp\stxxl' is allocated, space: 10000 MiB, I/O
> implementat
> ion: wincall queue=0 devid=0
> [info] Parsing in progress..←[0m
> [info] input file generated by Osmium (
> http://wiki.openstreetmap.org/wiki/Osmium
> )←[0m
> [info] timestamp: 2015-07-13T21:15:02Z←[0m
> [info] Ignoring turn restrictions←[0m
>
>
> - is there somewhre a log file we can check?
> - does osrm.extract expect all info to be available? I can image that the
> BBox rectangle extract might be missing some nodes or other elements in
> routes/restrictions etc?
> - more generic, what is the information osrm.extract is expecting in an
> osm file?
>
> thanks
>
> Luc
>
>
>
>
>
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