Tag:marker=aerial
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 marker = aerial
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| Description |
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A marker designed to be seen by aerial inspection, usually composed of a roof cover on a pole 
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| Group: man made |
| Used on these elements |
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| Useful combination |
Status: approved
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| Tools for this tag |
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Aerial markers can be clearly identified from aircraft inspecting the surroundings of an underground infrastructure like pipelines or main high voltage cables.
They are designed with a large cover displaying clear reference to the representative colour of the utility they refer to (yellow for gas, red for power and so on)
Examples
Oil & Gas
| Photo | Location | Tagging | Note |
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France |  marker=aerialutility=gas colour=yellow operator=GRTgaz ref=74A |
A big yellow marker warning about the presence of a high pressure gas  pipeline buried nearby
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Belgium | marker=aerial utility=oil colour=orange operator=Total ref=9.9 |
An orange aerial marker for Total pipeline network in Belgium pipeline buried nearby
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France | marker=aerial utility=gas colour=yellow barrier=stile operator=GRTgaz ref=359 |
An aerial marker supported by a stile attached to a narrow ladder helping people crossing fences
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France | marker=aerial utility=chemical operator=Elf Antar France ref=PK 373.300 phone=04 78 70 30 30 |
An aerial marker indicating the presence of an ethylene pipeline buried below. At right, a cathodic protection marker
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France | marker=aerial utility=oil operator=SPSE ref=PK 400.934 phone=04 42 05 01 64 |
An aerial marker indicating the presence of a hydrocarbon pipeline buried below. At right, a pedestal marker |
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Italy | marker=aerial utility=gas colour=orange |
An aerial marker indicating the presence of a gas pipeline buried below. |
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UK | marker=aerial utility=gas colour=red and whitematerial=plastic |
The standard UK aerial gas marker usually lacks a hat but makes up for this by being 2m tall and quite thick. Although post-shaped, it is tagged as an aerial marker (rather than a post marker), even though it is post-like, for two reasons: (1) it is designed to be visible from the air, and (2) the smaller non-aerial gas markers are already commonly/usually referred to as marker posts in the UK. The "material=plastic" is somewhat redundant as all aerial markers in the UK are plastic. However, since most UK utility markers are either made of concrete or plastic, it does no harm to add this attribute. |
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UK | marker=aerial utility=oil |
The standard UK aerial oil markers usually have a hat, but colours can vary considerably depending on the operator of the pipeline. Sometimes the hat is flourescent pink. Sometimes white. Sometimes black with a yellow stripe or yellow with a black stripe. The image left shows a GPSS pre World War II white marker, with post World War II yellow/black roofed aerial marker post beside it. |
Power
| Photo | Location | Tagging | Note |
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France | marker=aerial utility=power colour=red |
An aerial marker indicating the presence of high voltage cable buried below |
Telecom
| Photo | Location | Tagging | Note |
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France | marker=aerial utility=telecom colour=yellow operator=France Télécom ref=1/1 phone=05 21 68 97 |
An aerial marker indicating the presence of an optical fibre cable buried below
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