Table:
text: Geohash
Worked example
Worked example
geohash_length lat_bits lng_bits lat_error lng_error km_error
1 2 3 ±23 ±23 ±2500
2 5 5 ± 2.8 ± 5.6 ±630
3 7 8 ± 0.70 ± 0.7 ±78
4 10 10 ± 0.087 ± 0.18 ±20
5 12 13 ± 0.022 ± 0.022 ±2.4
6 15 15 ± 0.0027 ± 0.0055 ±0.61
7 17 18 ±0.00068 ±0.00068 ±0.076
8 20 20 ±0.000085 ±0.00017 ±0.019

Question: What is the lowest geohash length if the lat bits are less than 7 and the km error of ±2500 for geohash?

Question: What is the highest geohash length when the lat error is ±0.00068 and the lat bits are greater than 17?

Question: What is the maximum geohash length when an ng error is ±0.00017 and an lng bit is less than 20?