> For the complete documentation index, see [llms.txt](https://docs.phoenixlidar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.phoenixlidar.com/spatialexplorer-8-and-9/user-interface/toolbars/analytics/create/create-contours.md).

# Create Contours

<figure><img src="https://2222094320-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdEevfLZRIk38LUPwDa4V%2Fuploads%2FNcHgrHe7yewmwAX8fSma%2Fcreate-contours.svg?alt=media&amp;token=26fe3b27-1961-44c4-962f-ad05134413b8" alt=""><figcaption></figcaption></figure>

The typical parameter modified when creating contours is the **Altitude Step**, which specifies the vertical precision of the contours (e.g. "2-foot contours"). If the terrain is highly variable, it may be necessary to reduce the **Grid Size** parameter:

<figure><img src="https://2222094320-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdEevfLZRIk38LUPwDa4V%2Fuploads%2FDdVYz8D3tIFtsJuYFu0Q%2Fimage.png?alt=media&amp;token=f536b74b-56b8-4903-aad7-f55eebc077ae" alt=""><figcaption></figcaption></figure>

Contour geometries can be saved in the following formats: OBJ, KMZ/KML, SHP, DXF, and LandXML