Hi all.
I am setting out a complex landscaping drawing and am creating site sections which provide dimensions from a sea level datum. What I want to do is modify a dimension so that it is automatically subtracted from a sea level height.
For example. If my Sea level to datum is 30000mm, if an area of patio is 600mm below that. I want to be able to dimension down from a datum line but have the dimension read as 29400mm and not 600mm. So ideally there needs to be an equation of 30000mm - the dimension (600mm). Is there a way of setting an equation on a dimension which will automatically do this?
For reference the sea level is more like 31338 and level down is 525.4mm. So as you can imagine having the ability to add these automatically will be much more favourable ๐
