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Python module to decode/encode Geohashes to/from latitude and longitude. See http://en.wikipedia.org/wiki/Geohash

License: GNU Affero General Public License v3.0

Python 100.00%

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geohash's Issues

Import errors

Please see patch here : https://github.com/KimaruThagna/geohash

AGPL virality issue

Due to issues with using APGL in commercial software, we had to stop using this library.

Not us, but a major player about AGPL: https://opensource.google/documentation/reference/using/agpl-policy

Changing to MIT or another more permissive license could be beneficial.

NOTE: Thx for putting together this lib, it is useful
NOTE: I understand that pypi links to a fork of this, but 1. it has no issue tracking, 2. if anybody, the original author is the one to change the license.

precision4 and 3 are the same?

If I run:

from geopy.distance import geodesic
base_coord_x, base_coord_y = 9.42839, 47.66578
for precision in range(12, 0, -1):
    prev_dist = 0
    done = False
    for factor in [0.0000001, 0.00001, 0.0001, 0.001, 0.01, 0.1]:
        if done:
            break
        for i in range(1000):
            if done:
                break
            current_y = base_coord_y +(i * factor)
            current_x = base_coord_x +(i * factor)
            dist = int(geodesic((base_coord_x, base_coord_y) , (current_x, current_y)).m)
            dist2 = int(geodesic((base_coord_x, base_coord_y) , (current_x, current_y)).m)
            a = geohash_encode(base_coord_x, base_coord_y, precision=precision)
            b = geohash_encode(base_coord_x, current_y, precision=precision)

            if a != b:
                print(f'geohash precision={precision:02}: {prev_dist}-{dist}m')
                done = True
            prev_dist = dist

I get:

geohash precision=12: 0-0m
geohash precision=11: 0-0m
geohash precision=10: 0-0m
geohash precision=09: 5-5m
geohash precision=08: 18-20m
geohash precision=07: 179-180m
geohash precision=06: 606-607m
geohash precision=05: 2306-2322m
geohash precision=04: 22754-22910m
geohash precision=03: 22754-22910m
geohash precision=02: 1326809-1328341m
geohash precision=01: 6056042-6068097m
```

What is the reason that 3 and 4 are the same?

python3.4 AttributeError: 'module' object has no attribute 'expand'

I can import and use encode() normally. But cannot import expand()...

Why -1 here ? It seems introducing some extra error

geohash/Geohash/geohash.py

Line 70 in f31e613

lats = "%.*f" % (max(1, int(round(-log10(lat_err)))) - 1, lat)

For example,
hash = 'ws10q7p4'
decode hash with default method, which removes irrelevant digits per the error
pgh.decode(hash) # (22.561, 114.191)
the resulted coords actually offset a little bit from the oringinal value
pgh.encode(22.561, 114.191, 8) # ws10q7p7
here is the exact decoding result, which is called from the default method
pgh.decode_exactly(hash) # (22.560853958129883, 114.19069290161133, 8.58306884765625e-05, 0.000171661376953125)
the error is at scale of 1e-05, so I keep 4 decimal digits and try to reverse the encoding, it matches the original.
pgh.encode(22.5609, 114.1907, 8) # ws10q7p4

add version ?

Can version be considered for a future update?

python3.5.2 can't find the module

seems to be the problem of the capital package name

Python 3.5.2 (default, Feb  8 2017, 16:36:05)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import geohash
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'geohash'
>>> import Geohash
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/root/.virtualenvs/mdt-test/lib/python3.5/site-packages/Geohash/__init__.py", line 21, in <module>
    from geohash import decode_exactly, decode, encode
ImportError: No module named 'geohash'

vinsci / geohash Goto Github PK

geohash's People

Contributors

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geohash's Issues

Import errors

AGPL virality issue

precision4 and 3 are the same?

python3.4 AttributeError: 'module' object has no attribute 'expand'

Why -1 here ? It seems introducing some extra error

add version ?

python3.5.2 can't find the module

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