# Tools

### Plot ELR

Start by choosing the ELR you wish to work with from the drop down on the left of the toolbar.

[![image.png](https://docs.nrsdb.uk/uploads/images/gallery/2026-04/scaled-1680-/image.png)](https://docs.nrsdb.uk/uploads/images/gallery/2026-04/image.png)

This will draw the path of the ELR on the map and create a table showing all the "track segments" and their mileages.

A "track segment" is a contiguous section where the ELR and TrackID (TRID) are the same.

#### Filter By TrackID

You can now reduce the path shown on the map to a specific TRID. The list only shows valide TRIDs for this ELR.

#### Locations

The 'Locations' drop down shows all the key Locations along this ELR in ascending mileage order. If you select one there is a popup showing the possible LORs.

If you click on the marker icon the Locations are plotted onto the map. Popups are available to show the name and mileage.

[![image.png](https://docs.nrsdb.uk/uploads/images/gallery/2026-04/scaled-1680-/Vc9image.png)](https://docs.nrsdb.uk/uploads/images/gallery/2026-04/Vc9image.png)