# Applying Mapper Measures

A walkthrough of how to apply OpenStudio measures to energy simulations of Dragonfly with URBANopt.

The workflow described in the video allows the specification of different measure arguments for each Building in a Dragonfly model. A measure that applies objects that represent electric vehicle charging is used as a sample.

Check out the [Introduction](/ladybug-tools-academy/urban-energy-with-dragonfly/introduction.md) page to find sample files used in this video.

{% embed url="<https://youtu.be/S3pyLl5fOPQ>" %}

## Additional Resources

**Grasshopper Definition:** <https://github.com/ladybug-tools/lbt-grasshopper-samples/blob/master/samples/dragonfly/mapper_measure_example.gh>

**Measure for EV Charging**: <https://github.com/ladybug-tools/lbt-grasshopper-samples/tree/master/samples/dragonfly/Add_EV_Load>


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