BUG: Point Lookup Providing Incorrect Location

[dwrjyliu]

I wanted to report a minor bug I'm experiencing in the GPS lookup.

When I make a GPS lookup -> GridID, GridX, GridY lookup, I'm occassionally getting an erroneous GridID, GridX, GridY tuple. It appears that the GridY coordinate is off by 1 to the north occassionally.

As an example, for the point:
Lat : 36.6133024
Lon : -120.3817894

This should be in HNX 29, 27

However, the query: https://api.weather.gov/points/36.6133024,-120.3817894

Returns:
"geometry": {
"type": "Point",
"coordinates": [
-120.3818,
36.613300000000002
]
},
"properties": {
"@id": "https://api.weather.gov/points/36.6133,-120.3818",
"@type": "wx:Point",
"cwa": "HNX",
"forecastOffice": "https://api.weather.gov/offices/HNX",
"gridId": "HNX",
"gridX": 29,
"gridY": 98,

When I followup on HNX 29 98:
https://api.weather.gov/gridpoints/HNX/29,98/forecast
"coordinates": [
[
[
-120.403274,
36.644170299999999
],
[
-120.3980844,
36.622203399999997
],
[
-120.3706792,
36.626370399999999
],
[
-120.3758634,
36.6483378
],
[
-120.403274,
36.644170299999999
]
]

All of the latitude points are > the provided 36.613300000000002 and puts the returned gridpoint north of the intended target.

I've documented the faults I'm experiencing on this Google Map:
https://www.google.com/maps/d/edit?mid=1O2FrOaxCCh6G_PLTcTNWG5ZOMsiI_r1f&usp=sharing

For my test case, I manually archived some coordinates of GridID, GridX, GridY. They should correspond to the corners of a Weather.gov API 2.5 km square grid.

These points are averaged to get the center point. I passed this center point is passed back to the Weather.gov API which should return the same GridID, GridX, GridY tuple. I've also included the query URL as "Query URL" in the dropped pin.

However, when going to the forecast page of the returned tuple, the GPS coordinates of the returned tuple are off by 1 to the north, specifically for GridY.