---
title: "Surveyed Control Point Requirements for NavVis Devices"
slug: "surveyed-control-point-requirements-for-navvis-devices"
description: "Spread surveyed control points across the whole scanning area for NavVis devices - never in one straight line, offset at least one to the side. Place at corridor ends, floor changes, stair landings; keep them high-contrast and matte."
tags: ["Control Point Requirements", "Control Points", "Scanning Accuracy", "Surveyed Control Points"]
updated: 2026-04-08T12:39:11Z
published: 2026-04-08T12:39:11Z
canonical: "knowledge.navvis.com/surveyed-control-point-requirements-for-navvis-devices"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledge.navvis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Surveyed Control Point Requirements for NavVis Devices

## Introduction

These requirements describe how and where to place control points for scanning with NavVis devices.

## Requirements for NavVis Devices

- To achieve the best possible results in terms of overall accuracy, spread control points across the full planned scanning area.
- Do not add control points in a single straight line, change the height on walls. At least one control point must be offset to the side, not all on a single center line.
- Control point locations should be kept as consistent as possible between levels (similar relative position per floor).
- Control points must use surveyed coordinates that match the survey file IDs written next to the markers.
- Add control points at:
  - The ends of long runs (e.g. corridors, façades, production lines), and
  - Major transitions (e.g. zone changes, floor changes, geometry changes).
  - Near corners, columns, or other wall breaks / perimeter features.
  - On stable features (e.g. structural columns, permanent walls).
  - At stair landings
  - Near stair and elevator entrances on each level.
- Place control points near:
  - Zone boundaries, and floor boundaries
  - Near both ends of the corridor or linear run.
  - At mid‑span in long corridors / façades (add more if needed for length/complexity).
- Place control points at a working height that:
  - Is easy to see from typical scanner positions
  - Is easy to reach for capturing using a NavVis device.
- Do not place control points in the following:
  - Swinging door areas
  - Tight turning areas.
  - High foot traffic areas where they can be covered (e.g. posters) or damaged.
  - Highly reflective surfaces
  - Patterned backgrounds that reduce visibility.
- Control points must be:
  - High‑contrast
  - Matte (non‑reflective)