# Calculate Elevations

This feature of Sort Mark **calculates the elevation values** for elements of the selected category and writes the values to the selected parameter (length-type).

Run the **Calculate Elevation** command and select a parameter to write the values to or create a new shared parameter.

In the example below, a new shared parameter **Z coordinate** is created to write the elevation values.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FrtaItDh3hIGkEUZUtmuA%2F0.png?alt=media)

You can choose between the project elevation (Project Base Point) and shared elevation (the Survey Point). And you can choose to measure either the Top or the Bottom of elements. **OK** to run the command.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FJIjEnWIT5wIBIDzYIo3i%2F1.jpeg?alt=media)

Elevations of door bottom points are written into the new shared **Z coordinate** parameter.

{% hint style="info" %}
For more options and customizable formatting of coordinate values or elevations, use the [**Element Numbering**](https://docs.besmart.software/common-for-several-products/sort-mark/room-space-sheet-element-numbering) functionality.
{% endhint %}

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2Fk1FErA4451EofvMce8IV%2F2.jpeg?alt=media)