# Route closure

> Source: https://topodrone.com/knowledge/slam-200-200e/route-closure/
> Section: SLAM 200/200E
> Updated: 2026-10-02

## U-shaped closed route

An elongated closed route resembles a U shape. A U-shaped route can hardly meet the accuracy requirements. If conditions allow, users are advised not to choose such a route.

## Single closed O-shaped route

The trajectory resembles an O shape, without redundant closed loops. The data calculation accuracy is good, which is one of the main requirements for route selection.

## Multiple closed O-shaped route

The overall trajectory resembles an O shape, but with several closed loops. The data calculation accuracy in this case is the best. Such a route consists of several closed O-shaped loops, which significantly improves calculation accuracy and is the optimal route plan.

| ![Route closure](https://topodrone.com/knowledge/i/7e2625dc9d5449e3.png) | ![Route closure](https://topodrone.com/knowledge/i/525ace724c2d3a43.png) | ![Route closure](https://topodrone.com/knowledge/i/3acdad1f62a3246e.png) |
| --- | --- | --- |
| **U-shaped closed route** | **Single closed O-shaped route** | **Multiple closed O-shaped route** |