Proposed features/Utility markers proposal

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Bornes et balises de repérage en France 06.jpg
Utility markers
Status: Proposed (under way)
Proposed by: Fanfouer
Tagging: marker=*
Applies to: node
Definition: Improve utility markers mapping by consolidate usage of marker key
Drafted on: 2019-05-09
RFC start: 2019-07-14

Utility markers can be seen pretty everywhere in cities and in countries also. OSM use to map them with several keys, depending on which kind of utility or purpose they was intended for. This proposal will try to summarize many sort of them and propose a unique set of values for the marker=* key.

Rationale

Utilities feature all networks that provides useful energy or fluids to human activities (industry, domestic appliances, public works...).
These networks can be really dense and often buried undeground in cities as to reduce their vulnerablity, visual impact and improve people security.

Markers are used to remind us about their underground presence. Any forgotten gas or high voltage line can have desastreous impact on any occasional digger reaching them.
Furthermore, markers are great visual helps for navigation or location on unknown places. Refs and colour can help anyone who want to locate on a map.

Currently, OSM only knows certain markers, for pipeline and underground power cables but there are many more situations where markers are used. A side issue is markers aren't properly part of the line they refer to. Then it may be confusing to use power=* or pipeline=* as it leads to think the marker is directly installed on the pipeline or cable.
It seems interesting to group the general knowledge of markers under a single key instead of defining the same concepts on each mapping subject.

Proposal

It is proposed to use marker=* key to map all kind of utility markers, without preventing to extend it to any other feature in the future (by defining different new values).
This proposal focuses on man made infrastructure burried underground : pipelines, power cables and supplies, telecommunication lines (both copper and fibre) and fire hydrants.

There are exitsing keys like pipeline=marker that should not be used anymore as to not clutter naming intended for directly-connected-to-pipelines features (valves, pumps, tanks...).

How to map

Once located on ground during a survey or got from public information / street level pictures, just put a node on the exact point and add following tagging on it.
For sake of One_feature,_one_OSM_element, each marker should get its own node on OSM at the exact place it belongs to.

Markers will surely indicate that a particular linear feature (pipeline, power cable...) lies next to it. Nevertheless, markers are installed to be seen and prevent damage at various distances from the feature they refer to. So it's not recommended to put markers directly on pipeline or cable ways, unless the marker is seen fixed on them. Markers are not devices with direct impact or sensing on live features so share nodes between lines and them wouldn't be accurate.

Tagging

Here is a summary of recommended tagging for a utility marker

Key Value Comment Recommendation
marker <marker nature> The node corresponds to a marker seen on ground mandatory
support <support> The nature of support the marker is installed on recommended
material <material> The material composing most of the marker (refering to the support if dedicated) optional
location <location> The physical location of the marker, often overground optional
ref <marker ref> If available, the ref as it can be read on the marker optional
operator <company name> The name of company who operate the marker (and often the associated linear feature, cable or pipeline) optional
colour <colour> The mot representative colour of the marker optional

pressure=* and voltage=* are explicitly not mentioned here as it's not a property of the marker itself but of the buried infrastructure it refers to. You'd better to add them to corresponding feature and not on the marker with these keys. You can still add a note=* or use description=* as to not loose information.

And a list of possible values for marker=* dedicated to utilities.
This list can be completed as needed with equivalent values valuable in other fields of knowledge.

List of possible marker=* values
Key Value Comment
marker pipeline Indicate that a pipeline is buried next to the marker, possibly underground and not mandatorly righly below
power_cable A power cable is installed next to the marker, possibly underground and not mandatorly righly below
telecom_cable A telecommunication cable is installed next to the marker, possibly underground and not mandatorly righly below
fire_hydrant A fire hydrant is available next to the marker, possibily underground and not mandatorly rightly below
List of possible support=* levels
Key Value Comment
support pole The marker is installed on a pole
wall_mounted The marker is stuck on a wall
ground The marker is fixed on the ground
pedestal A stone or concrete block hold the marker
stile The marker is installed on a stile which also allows to cross a fence

Edition management

This proposal propose to replace some values, as described below.

Values to be replaced

Obsolete tag Usage volumetry Used for ? New tag(s) to use
pipeline=marker 34,146 on 2019-07-24 Mark a pipeline course marker=pipeline
cable=marker 48 on 2019-07-24 Mark a power cable course marker=power_cable
power=marker 214 on 2019-07-24

Affected pages

Examples

Pipelines

Photo Location Tagging Note
Bornes et balises de repérage en France 06.jpg
France node marker=pipeline
colour=yellow
support=pole
cover=roof
operator=GRTgaz
ref=74A
A big yellow marker warning about the presence of a high pressure gas pipeline burried beside
Total Beacon.jpeg
Belgium node marker=pipeline
colour=orange
support=pole
cover=roof
operator=Total
ref=9.9
An orange roof marker for Total pipeline network in Belgium pipeline burried beside
Bornes et balises de repérage en France 01.jpg
France node marker=pipeline
colour=yellow
support=stile
cover=roof
operator=GRTgaz
ref=359
An aerial marker supported by a stile, a narrow ladder helping people crossing fences
Bornes et balises de repérage en France 08.jpg
France node marker=pipeline
colour=yellow
support=pedestal
operator=GRTgaz
ref=EZ 20 FI
A pedestal indicating the presence of a high pressure gas pipeline burried below
Fluxys pedestal.jpg
Belgium node marker=pipeline
colour=orange
support=pedestal
operator=Fluxys
A pedestal indicating the presence of a high pressure gas pipeline burried below.


They can be seen on aerial imagery as well : Fluxys pedestal aerial imagery.png

Bornes et balises de repérage en France 07.jpg
France node marker=pipeline
colour=yellow
support=ground
operator=GRTgaz
phone=0 800 24 61 02
A (survey) nail marker hammered in the road
Plaque de signalisation gaz en France 02.jpg
France node marker=pipeline
colour=yellow
support=wall
operator=GrDF
ref=103
phone=0800 47 33 33
A wall mounted signage indicating the presence of a gas pipeline burried below
Bornes et balises de repérage en France 19.jpg
France node marker=pipeline?
colour=white
support=pedestal
operator=GRTgaz
A cathodic protection marker over a gas pipeline
Bornes et balises de repérage en France 14.jpg
France node marker=pipeline
colour=white
material=plastic
support=pedestal
operator=Storengy
ref=EZ 08
A pedestal indicating the presence of water and brine pipelines burried below
Fluxys flat pole.jpg
Belgium node marker=pipeline
colour=orange
material=plastic
support=pole
operator=Fluxys
A pole indicating the presence of Fluxys gas burried below. Their top often have ref written
Bornes et balises de repérage en France 05.jpg
France node marker=pipeline
colour=grey?
support=pole
cover=roof
operator=Elf Antar France
ref=PK 373.300
phone=04 78 70 30 30
An aerial marker indicating the presence of an ethylene pipeline burried below.
At right, a cathodic protection marker
Bornes et balises de repérage en France 20.jpg
France node marker=pipeline
colour=grey?
support=pole
cover=roof
operator=SPSE
ref=PK 400.934
phone=04 42 05 01 64
An aerial marker indicating the presence of an hydrocarbon pipeline burried below.
At right, a pedestal marker

Power cables

Photo Location Tagging Note
Bornes et balises de repérage en France 10.jpg
France node marker=power_cable
colour=red
support=pole
cover=roof
An aerial marker indicating the presence of high voltage cable burried below
Borne de repèrage des câbles électriques souterrains.jpg
France node marker=power_cable
colour=red
support=pole
operator=EDF
An aerial marker indicating the presence of 20 kV cable burried below
Power marker panel underground cable.jpg
France node marker=power_cable
colour=yellow
support=pole
operator=ESSeyssel
A pole sign warning about the presence of a buried high voltage power cable in French country.
Power ground marker underground cable.jpg
France node marker=power_cable
colour=red
support=ground
operator=Enedis
A pretty old red marker warning about the presence of buried high voltage cable beneath it. HTA means high voltage A and is defined in French norm. EDF mention, lightning sign and red colour mean it's usually about electricity network.

Telecommunications

Photo Location Tagging Note
Fiber optic cable marker; Nokesville, VA; 2014-04-13.jpg
USA node marker=telecom_cable
colour=orange
support=pole
operator=GTE
An aerial marker indicating the presence of an optical fibre cable burried below
French telecom optical cable marker.jpg
France node marker=telecom_cable
colour=yellow
support=pole
cover=roof
operator=France Télécom
ref=1/1
phone=05 21 68 97
An aerial marker indicating the presence of an optical fibre cable burried below
Signalisation de fibre optique enterrée 02.jpg

Fire hydrants

Photo Location Tagging Note
Panneau BI (Bouche Incendie).jpg
France node marker=fire_hydrant
support=pole
An signage indicating the location of an underground fire hydrant
Hydrant marker, Rake Lane, Upton.jpg
UK node marker=fire_hydrant
support=wall
An old fire hydrant sign on the wall
Blue raised pavement marker.jpg
UK node marker=fire_hydrant
support=ground
colour=blue
A blue raised pavement marker denotes a fire hydrant on the left sidewalk.
French Paris hydrant marker.jpeg
France node marker=fire_hydrant
support=wall
operator=Eau de Paris
ref=751120563
Those plates are currently rolled out by Eau de Paris and gives several information about a near hydrant installed at stated distances from the marker. The hydrant is fed by water main of given diameter

See also