One of the most interesting HoloBuilder features for construction professionals is the ability to measure objects and distances within a building. In this tutorial, we show you how you can add measurable walls to your 360° images and what is important to create accurate wall measurements.
Please note that the Wall Measurement tool does not replace highly accurate measurement systems on-site. Any critical measurements should be double-checked for their accuracy.
What to consider when taking 360° images for measuring?
Wall Measurement is an integrated tool for adding realistic measurements of, e.g., walls, window or doors in your 360° scene to display relevant information on proportions and virtual layouts directly in a 360° scene. It is possible to do these wall measurements from a single photo if the height of the camera lens above the floor is known. Always make sure you know the height of the camera (lens) on your tripod when taking the 360° images. According to the defined image height, we can calculate the measures of any marked objects in a 360° scene.
- Compatible with any camera: Wall Measurement is not limited to one camera setup for capturing the according 360° scene you want to make the wall measurement in. Feel free choosing any 360° camera with the supported
- Work with a tripod: To position your camera accurately, make sure to use a tripod which allows you to fixate a certain height and level the camera to be parallel to the floor. When, e.g., using a DSLR camera, the lens needs to stay on the same heights for all images. Otherwise, the measurements will not be very accurate.
Positioning of the camera
To work with Wall Measurement, it is important to capture each image at an equal height (distance from the camera lens to the floor). With this given height, HoloBuilder then enables you to accurately measure parts of your virtual 360° scene. As for now, it is best to set the height of the lens to approximately 63 inches (160cm). But, you can also choose any other height and change the settings in HoloBuilder accordingly. It is very important that you set the camera lens to the height you want to use and not only the tripod, e.g., with the Theta S still having about 2.8 inches (7cm) extra from the bottom to the lens, the measuring would become inaccurate. The more accurate the height of the lens, the better the measuring results will be when editing the scene.
At the moment, it is only possible to measure any objects or other aspects in a 360° scene that are in a 90° relation to the floor (e.g. walls, windows, doors, beams etc.). Make sure the room you want to insert the wall measurements in has a flat floor with an equal height. If the floor has a different height in some areas, the in the editor specified height will not apply there and any measurements will become inaccurate. Furthermore, for the calculations of a wall, there needs to be a visible intersection of the real wall and the floor with a 90° angle. Otherwise, it will not be possible to place the virtual wall correctly on which the measurements are placed.
Below you can see an example how a measurement setup would like like under real conditions:
Creating the tour
- Make sure to place your camera on a tripod with integrated level or use a manual level to position it as balanced as possible.
- Use a folding rule to measure the distance from the center of the camera’s lens to the floor and note it down.
- Capture and connect your 360° images with the JobWalk app or simply upload the files manually from the camera.
Wall Measurement can also be used in combination with the JobWalk app. Simply make sure to set the tripod height to the desired level when creating the tour with the JobWalk app. Furthermore, it is possible to edit added Time Travel scenes with Wall Measurement.
How to make the wall measurements?
- Click the “Measurements” button with the ruler icon in the right-hand sidebar to open the Wall Measurement menu.
- Set the height (distance from the camera lens to the floor) your image has been taken at in inches or cm. It is possible to adjust the defined height of your camera lens or the measuring unit in the Wall Measurement settings.
Making the wall measurements
1) Define a wall:
To start your measurements in the scene, you first need to select the area or ‘wall’ you want to make the measurements in. When first opening the Wall Measurement menu, the correct tool for creating a virtual wall first will automatically be selected. If not, click the wall icon in the Wall Measurement menu. Select one point in your 360° image (an intersection point between the floor and a wall) by clicking (if the Wall Measurement tool is selected). Next, you need to set the height and orientation of the whole area. Either click first on a horizontally aligned point intersecting with the floor and then set the height by choosing a vertically aligned intersection point with the ceiling, marking a kind of four-sided figure, or vice versa.
By right-clicking on the according wall, it is possible to delete it. Select ‘Remove Wall’ from the context menu to only delete the wall but keep the attached measurement, e.g. if you want to adjust the size of the wall. Or, Choose ‘Remove Wall and its measurements’ to delete the wall completely including all measurements made on this wall.
2) Trim the wall:
Limit the virtual wall to a specific section of your 360° scene. Select the razor blade icon for trimming the virtual wall horizontally. To do so, simply place the vertical cutting line to the location you want your virtual wall to start and end. Adjust the size of the wall later on either by redoing the trimming or removing and starting over with the complete wall.
3) Apply wall measurements:
Within this marked area, you can now measure anything, such as doors, windows, etc., even angular, diagonal distances. Select the last button with the rule to set any measurements. Added measurements can be deleted by right-clicking the corresponding measurement and selecting ‘Remove Measurement’ from the context menu.