What are these things...?

[road_kill]

...that have suddenly appeared on the pavements? Sometimes they have a painted red triangle around them. I'm sure they never used to be there...

[pingu]

markers for putting a theodolite onto.

so they get the exact same place every time they do a measurement

[Alycidon]

markers for putting a theodolite onto.

so they get the exact same place every time they do a measurement

Would be handy for then and now photos!!

[road_kill]

markers for putting a theodolite onto.
so they get the exact same place every time they do a measurement

Ah! thanks.
That means somebody is surveying the bowling green and old tennis courts again. Not good news...

[Godsgift]

markers for putting a theodolite onto.

so they get the exact same place every time they do a measurement

Nah! It's to direct the Iluminati to the non believers!

[DickyHart]

markers for putting a theodolite onto.

so they get the exact same place every time they do a measurement

Nah! It's to direct the Iluminati to the non believers!

if godsgift stops posting suddenly, the Illuminati sorted him out for giving it away.

[the researcher]

is it where cables are located below the tarmac perhaps?

[sandabound]

is it where cables are located below the tarmac perhaps?

No it's like Pingu says, it's a theodolite marker/