ol/interaction/Draw


### freehand
```typedraw = new Draw({      source: source,      type: typeSelect.value,      freehand: true})```




### measure
```type```



> [Draw and Modify Features](https://openlayers.org/en/latest/examples/draw-and-modify-features.html)

> [Measure](https://openlayers.org/en/latest/examples/measure.html)

> [Freehand Drawing](https://openlayers.org/en/latest/examples/draw-freehand.html)






