# Create ellipse geometry > Supported in: Batch, Faster, Streaming Approximates an ellipse as a polygon centered at the given geo coordinate. The distance between points is computed along the surface of the WGS84 ellipsoid approximating the surface of the earth. **Expression categories:** Geospatial ## Declared arguments * **Center:** Longitude and latitude for the center of the ellipse.
*Expression\* * **Semi-major axis length:** The length of the longest radius (half the axis) of the ellipse.
*Expression\* * **Semi-major axis length unit:** The unit of the semi-major axis length.
*Enum\* * **Semi-minor axis:** The length of the shortest radius (half the axis) of the ellipse.
*Expression\* * **Semi-minor axis length unit:** The unit of the semi-minor axis length.
*Enum\* * *optional* **Azimuth:** The angle between the major axis and the y axis. Positive angles indicate a clockwise rotation, while negative angles indicate a counter-clockwise rotation.
*Expression\* * *optional* **Azimuth angle unit:** The unit of the azimuth angle.
*Enum\* * *optional* **Number of points:** The number of points used to approximate the ellipse.
*Expression\* **Output type:** *Geometry*