Can anyone tell me what these mean!

[ggc]

Hi all,

 

Please can anyone tell me what these numbers relate to, above ground level, meters, cm, sea level? Thanks!

[Mr Punter]

Metres above ordnance datum.

[ggc]

2 minutes ago, Mr Punter said:

Metres above ordnance datum.

Thanks Mr Punter, so that means from the lowest point on that image +52.470 to the eaves measurement up at  +55.879 is 3.409 metres would this be about right? Thanks!

[Mr Punter]

1 minute ago, ggc said:

Thanks Mr Punter, so that means from the lowest point on that image +52.470 to the eaves measurement up at  +55.879 is 3.409 metres would this be about right? Thanks!

 

Yep.  It is sometimes a pain to do the calculation but your survey may also reference some existing points, like chamber covers in the road, which can help you when setting out to make sure your floor levels etc correspond to your plans.

[DevilDamo]

7 minutes ago, ggc said:

Thanks Mr Punter, so that means from the lowest point on that image +52.470 to the eaves measurement up at  +55.879 is 3.409 metres would this be about right? Thanks!

Although it’s 55.897 so 3.427m up ?

[ggc]

11 minutes ago, Mr Punter said:

 

Yep.  It is sometimes a pain to do the calculation but your survey may also reference some existing points, like chamber covers in the road, which can help you when setting out to make sure your floor levels etc correspond to your plans.

really good to know, and now I realise that I see them by the side of a road sometimes! 

[ggc]

7 minutes ago, DevilDamo said:

Although it’s 55.897 so 3.427m up ?

Oops yep read that wrong! i've just gained some height brilliant!!