geopandas.GeoSeries.set_crs¶

`GeoSeries.``set_crs`(crs=None, epsg=None, inplace=False, allow_override=False)

Set the Coordinate Reference System (CRS) of a `GeoSeries`.

NOTE: The underlying geometries are not transformed to this CRS. To transform the geometries to a new CRS, use the `to_crs` method.

Parameters
crspyproj.CRS, optional if epsg is specified

The value can be anything accepted by `pyproj.CRS.from_user_input()`, such as an authority string (eg “EPSG:4326”) or a WKT string.

epsgint, optional if crs is specified

EPSG code specifying the projection.

inplacebool, default False

If True, the CRS of the GeoSeries will be changed in place (while still returning the result) instead of making a copy of the GeoSeries.

allow_overridebool, default False

If the the GeoSeries already has a CRS, allow to replace the existing CRS, even when both are not equal.

Returns
GeoSeries

`GeoSeries.to_crs`

re-project to another CRS

Examples

```>>> from shapely.geometry import Point
>>> s = geopandas.GeoSeries([Point(1, 1), Point(2, 2), Point(3, 3)])
>>> s
0    POINT (1.00000 1.00000)
1    POINT (2.00000 2.00000)
2    POINT (3.00000 3.00000)
dtype: geometry
```

Setting CRS to a GeoSeries without one:

```>>> s.crs is None
True
```
```>>> s = s.set_crs('epsg:3857')
>>> s.crs
<Projected CRS: EPSG:3857>
Name: WGS 84 / Pseudo-Mercator
Axis Info [cartesian]:
- X[east]: Easting (metre)
- Y[north]: Northing (metre)
Area of Use:
- name: World - 85°S to 85°N
- bounds: (-180.0, -85.06, 180.0, 85.06)
Coordinate Operation:
- name: Popular Visualisation Pseudo-Mercator
- method: Popular Visualisation Pseudo Mercator
Datum: World Geodetic System 1984
- Ellipsoid: WGS 84
- Prime Meridian: Greenwich
```

Overriding existing CRS:

```>>> s = s.set_crs(4326, allow_override=True)
```

Without `allow_override=True`, `set_crs` returns an error if you try to override CRS.