### Converting projected coordinates to lat/lon using Python?

• I assume this is a basic question but I can't seem to find or recognize the solution.

This site returns

``````Point:
X: -11705274.6374
Y: 4826473.6922
``````

when you searching with the first key value of 000090 as an example. I guess this is a spatial reference and I kinda get what that is.

I am looking for instructions or examples of how to convert this to Latitude and longitude using Python.

• The simplest way to transform coordinates in Python is pyproj, i.e. the Python interface to PROJ.4 library. In fact:

``````from pyproj import Proj, transform

inProj = Proj(init='epsg:3857')
outProj = Proj(init='epsg:4326')
x1,y1 = -11705274.6374,4826473.6922
x2,y2 = transform(inProj,outProj,x1,y1)
print x2,y2
``````

returns `-105.150271116 39.7278572773`

## EDIT based on Marc's comment:

pyproj 2.4 gives a FutureWarning about deprecated `Proj` initialization with the `init=` syntax. The updated syntax is identical but without the `init=`. Like this:

``````inProj = Proj('epsg:3857')
outProj = Proj('epsg:4326')
``````

Yep. Pyproj all the way.

It works for me

pyproj 2.4 gives a FutureWarning about deprecated Proj() initialization with the `init=` syntax. The updated syntax is identical but without the `init=`. Like this: `inProj = Proj('epsg:3857')` and `outProj = Proj('epsg:4326')`

I removed the `'init='` based on the edit, but my output of `transform(inProj,outProj,x1,y1)` gave me `(latitude, longitude)` instead of `(longitude, latitude)`. Anybody knows why ?