[JohnPercy]

Is there any possible way gates across highways can be distinguished from field gates? I don’t think it is possible to do that in a theme but is it at all possible to distinguish in the map preparation? Gates across highways (including footpaths) are important; the increasing number of field gates much less so.

Voluntary and Velocity themes - https://voluntary.nichesite.org

[ChristianK]

Hi John,

I see that there is a millon of Gates in UK, a tag indicating importance of the gates would be fine.

JohnPercy wrote:

Gates across highways

Thats tricky.
Even if we assume that the gate is a node (there are countless tagged as ways on borders and fences and… crossing highways) we would have to check every way the gate_node belongs which type of way it is (usually there are more ways = the highway and one or more fences, borders crossing the highway)
If we find a highway=* in the way_array this gate_node refers to we could add a tag to this gate_node indicating the highway type it blocks.

Lots of effort (no OSM tool I know for such a task, have to be coded) but possible.
Would catch most node_gates.
see https://www.openstreetmap.org/way/1038297033#map=19/57.579270/-5.147257

A mess are the gates tagged as ways.
These gates are part of a fence / boundary / whateverway / relation running across a highway/fence/border.
If there is NO clue between these objects, no intersection node – there is no real way to archieve this.
However most of these gate_ways have a node in the middle of the crossing, again tagged as „gate“.
So these way_gates could be treated as node_gates.
However, the „gate“ tag should be removed from the way the node_gate is part of.

Or.. its a gate w/o a crossing like here:
https://www.openstreetmap.org/way/1356457124#map=19/57.940434/-4.289626

How to handle this in preprozessing with reasonable effort – no idea yet.

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JohnPercy

[ChristianK]

Hi John,

Whats possible with reasonable effort:

Marking all nodes tagged as barrier=gate crossing _any_ type of highway.
Nodes would be marked with (eg.) barrier_cross_hw=bch_yes

these two lines would basicly do it:

wsl osmfilter clean.osm –keep="highway=" –keep-relations= -o=temp_highway.osm
wsl osmfilter temp_highway.osm –keep= –keep-nodes="barrier=gate" –modify-tags="barrier=gate add barrier_cross_hw=bch_yes" -o=bg_gates.osm

In Scottland.map we have 74222 nodes tagged as barrier=gate
After filtering 46124 of these are marked as crossing highways barrier_cross_hw=bch_yes

A definition _which_ type of highway a gate is crossing would be possible.
However this would mean to filter all gates (614000 for UK) and check against ALL Highways cause its not possible to catch ways belonging to a node with the usual tools (only vice versa)

I attached the OSM-File for the prozessed scotland gate_Nodes,

Best regards
Christian

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Tobias

[JohnPercy]

That sounds really great and very useful. I think the distinction between a gate crossing any highway whether a road or a path and anything else like a fence or a hedge is very significant.
At first sight the file looks the right sort of thing.

Voluntary and Velocity themes - https://voluntary.nichesite.org

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ChristianK, Tobias

[ChristianK]

Some numbers:

For UK clip of geofabrik there could be skipped ~200.000 gates

Actually I check only against barrier=gate
Which additional barriers should I check (lift_gate, swing_gate) or barrier=* ?

• Diese Antwort wurde vor vor 6 Tage, 19 Stunden von ChristianK bearbeitet.

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JohnPercy

[JohnPercy]

It was the plethora ordinary gates that was annoying me but some indicative numbers might help. Generally other types of gates appear to be across a highway of some sorts but I couldn’t be certain.

Voluntary and Velocity themes - https://voluntary.nichesite.org

[ChristianK]

final version (so far..):

wsl osmfilter planet.o5m –keep="highway=" –keep-relations= -o=temp_highway_planet.o5m
sleep.pl 5
wsl osmfilter temp_highway_planet.o5m –keep= –keep-nodes="barrier=gate =lift_gate =swing_gate =kissing_gate" –modify-tags="barrier= add barrier_cross_hw=bch_yes" -o=bg_gates_planet.osm

There are a lot of lift/swing gates…

I actually render

UK_Scotland
UK_Shetlands
UK_LakeDistrict
UK_Wales

These maps should be available tomorrow for regular download

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JohnPercy, mbe57

[JohnPercy]

Thanks for the updated maps. I’m still not sure which barriers should be included but this iteration doesn’t seem to be working fully as expected.

Not working as desired. Gate appears to be on highway (node on barrier=hedge) https://www.openstreetmap.org/node/10123320483#map=19/54.291380/-3.086950

Working as desired. Gate not on highway (node on barrier=wall)
https://www.openstreetmap.org/node/10123320472#map=19/54.291670/-3.087090

Voluntary and Velocity themes - https://voluntary.nichesite.org

[ChristianK]

Hi John,

Strange – sometimes it works sometimes not.
Running the script against the UK and Europe-Clip works.
Running against the planet-file fails.

Logic is OK – why osmfiter fails – I have check…..

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JohnPercy

[JohnPercy]

I noticed that in a couple of cases where it fails the gate node is part of a way that has nodes that are part of a relationship…

Voluntary and Velocity themes - https://voluntary.nichesite.org

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ChristianK

[ChristianK]

JohnPercy wrote:

part of a relationship

Tried with –drop-relations > same mess.
Europe works, Planet not…..

However this is no big surprise, osmfilter is a diva.
osmosis with –tf param works better, but osmosis cant handle o5m files.
This means that osmosis is many times slower and would have to convert planet.o5m to pbf.

….

• Diese Antwort wurde vor vor 2 Tage, 19 Stunden von ChristianK bearbeitet.

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JohnPercy, mbe57

[JohnPercy]

Would a simpler query work better, like matching all barriers rather than specific types? Or would that make it worse by producing more data?

Voluntary and Velocity themes - https://voluntary.nichesite.org

[ChristianK]

The problem is that, as first step – you have to filter all highways and hope that the tool you use add the nodes used by the highways. So only the barriers-nodes assigned to highways are written to the first temp-file.
Second step is to delete the ways and keep the nodes tagged as barriers.
So now we have all barriers assigned to a highway.
Dead simple- IF the tool handle this right.

Well, it seems that osmfilter is no longer maintained and has troubles with the big Object-IDs that have beem invented in OSM in the last 1-2 Years.
I had the same problem with OSMCONVERT – here I have found an updated version.
OSMFILTER is imo dead
Thats not funny cause I use it very often in my workflow…

Filtering is possible with osmosis – however this is dead slow down to non-sense with big files.

However there is a tools called OSMIUM – and this is still maintained.
Tests are promising, seems to work.

Here is the updated script:

wsl osmium tags-filter planet.o5m w/highway -o temp_highway_planet.osm.pbf
sleep.pl 5
wsl osmium tags-filter temp_highway_planet.osm.pbf n/barrier=gate,lift_gate,swing_gate,kissing_gate -o temp_gates_planet.osm
sleep.pl 5
wsl osmfilter temp_gates_planet.osm –keep-nodes="barrier=" –modify-tags="barrier= add barrier_cross_hw=bch_yes" -o=bg_gates_planet.osm

Attached you find the gates for the Lake District.
New maps tomorrow morning

Hope thats OK now….

• Diese Antwort wurde vor vor 2 Tage, 16 Stunden von ChristianK bearbeitet.

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mbe57, JohnPercy

[JohnPercy]

Great! That seems to be working and helps a lot.
If it doesn’t require more resources, could you please add barrier=stile to the process? I think kissing gate and stile are about equal in importance, although I suspect they are both unlikely to be mapped (or even occur) if not across a path.

Voluntary and Velocity themes - https://voluntary.nichesite.org

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ChristianK

[ChristianK]

Hi John,

Thanks for your help debugging this issue.. !

Best regards
Christian

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JohnPercy

[Autor]

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