# Locations and site plans

> Place and edit locations on the map, switch coordinate systems, group them, and lay out site plans.

Your **locations** are the heart of the map. This page covers placing and editing
them, the coordinate systems they carry, grouping them, and laying out **site
plans**. These are available on every plan.

## Locations

Open the **Locations** layer to see your locations as markers. You can:

- **add, move and edit** locations directly on the map,
- read each location's coordinates in both **WGS84** (latitude / longitude) and
  **OSGB36** (British National Grid), shown as you work,
- style markers by **location type**.

<Callout type="tip" title="Map placement">
  Where a location has no survey coordinates, give it an internal map position from
  the [table editor](/manage/table-editor) (the **Map placement** column on the
  Locations table) so it still appears on the map.
</Callout>

## Location groups

The **Location Groups** layer shows your
[location groups](/manage/location-groups) on the map, so you can see and work with
a defined set of locations together.

## Site plans

The **Site Plans** layer lets you lay out **site plans** - create, position and
edit them on the map, with a parameters dialog to set them up. Site plans link to
the project so they stay in step with your data.