Key:marker

From OpenStreetMap Wiki
Jump to navigation Jump to search
Public-images-osm logo.svg marker
Osm element key.svg
Description
Shape and function of a physical spot indicating underground utility infrastructure, highway milestones or private property limits Edit or translate this description.
Group: Infrastructure
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations
Useful combination
Wikidata
Status: approvedPage for proposal

A marker often indicates the presence a buried infrastructure nearby, length figures for milestones or limits for private properties. This key allows to describe the shape implied by the function of many markers we see on ground.
It is possible to combinate this key with utility=* in case of infrastructure marker only.

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.

Keep in mind to not add any properties (like diameter=*, pressure=* or voltage=*) that relates to the referring infrastructure on the marker directly. You'd better add them directly on the line of the buried infrastructure. You can still add a note=*, description=* or inscription=* as to not lose information.

Tagging

Here is a summary of recommended tagging for a utility marker

Key Value Comment Recommendation
marker <marker shape> The node corresponds to a marker seen on ground mandatory
utility <utility> Activity the marker is referring to if applicable recommended (if applicable)
material <material> The material composing most of the marker (referring 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 most representative colour of the marker optional
measurement <value> If the marker has some kind of measuring box/device attached, this tag describes the kind of measurement provided. optional

And a list of possible values for marker=* depending of their design.
This list can be completed as needed with equivalent values valuable in other fields of knowledge if needed.

LOADING TAG LIST... (If you do not see this tag list, you need to enable Javascript)

This table is auto-generated. See Taginfo/Taglists for a documentation on it.

Possible mistakes

If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!
If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!

Examples

See examples on values pages instead as it would be redundant.

See also