This is my first time creating GeoArt. There are 10 caches in the art. The fun is in the art and the solve, not in the find. All 10 are Lame Urban Micro Placements. I would like to thank Joe Friday for providing the 35mm film canisters.
Disclaimer: As always with this type of placement, there is a risk that some stingy friends have decided to make a home in the host. Approach with the normal precautions or consider making the find during the "off season."
N [2A + D + 7E] [4C + D + 2E].[120A + 50B + 12C + 8D + 23E]
W [5D + 25E] [2A - B - E].[25A + 100C]
- 3A + 2B - 2C = 3
- A - B + 2C = 19
- -2A + 2B + C = 2
- 10BD - 5DE - 2AB + AE = 0

You can validate your puzzle solution with certitude.
Congratulations to FTS and FTF: jasperdakota!