Possible Error generating Quadtree for (0,0) quadrant

[fabioaazevedo]

Using custom functions with the coordinates:

• Latitude: 41.14867208811922
• Longitude: -8.61602783203125
• Zoom: 1

Gives tiles tms_x and tms_y equal to zero, which is correct.

Then using:
quadtree = Tile.from_tms(tms_x=0,tms_y=0,zoom=1).quad_tree
gives quadtree="2", when it should be 0.

I managed to get the right result by commenting out this line:

pyGeoTile/pygeotile/tile.py

Line 79 in c744e54

tms_y = (2 ** self.zoom - 1) - tms_y

Is this really an error, or am I doing something wrong with the procedure?

Thank you.

[sap-nocops]

I see an error in calculating the quadkey from latitude longitude.
I wrote a test which fails

@pytest.mark.parametrize("latitude, longitude, zoom, quadkey", [(40.97356, 14.2153, 4, '1220')])
def test_latitude_longitude(latitude, longitude, zoom, quadkey):
    tile = Tile.for_latitude_longitude(latitude=latitude, longitude=longitude, zoom=zoom)
    assert tile.quad_tree == quadkey

It gives 1202 instead of 1220 which is the one I expect.

Weird thing is that if I call the same function with same latitude and longitude but 23 as zoom, the result is 12201010000110133101022 which is correct and as you can see the first 4 digits are 1220, exactly the same as I expect in the test above