[1990C4S]

I am applying for a permit to make a small change to my house.

I won't go onto the very painful details, but I have submitted a landscaping plan showing the elevation of my property for drainage.

The city has basically accepted the plans, with one caveat: they want all my elevations referenced to a city tombstone marker.

None of the tombstones are near my house. I have a manual transit, but nothing GPS connected.

How can I get a starting point for my property? I do not see an elevation on survey.

I could rent a GPS theodolite (I really DO NOT want to do that). I have looked for elevation maps online (I am not in USA), there are some 'rough' maps available, generally with 1.0 meter accuracy. There are also some phone elevation Apps, they appear to be 'close'.

I'm thinking I should get an elevation from my phone at the tombstone, and then use my phone in my yard, and use the difference to adjust all my numbers? I can also cross-check the hone result with an online map.

Anyone got a better idea? Paying $5,000 for a new survey is way overboard for what I'm doing.