# Spatial Planes

Overview

Spatial planes have many applications in ELCOVISION 10:

- As planes for single image or mono image measurement.
- As projection planes for image measurements
- As projection planes for orthophotos
- As projection planes in the CAD plugins

The plane to be defined in ELCOVISION 10 can be specified over any number of points; if a plane is created using more than 3 points, a balanced plane will be defined.

Any number of spatial planes can be defined for each project. In contrast to the rectification planes, however, these planes cannot be limited

## Define Spatial Planes

Here you can create planes that are arbitrarily positioned in space. If you are using the ELCOVISION 10 CAD plugin in a measuring mode, points can be clicked directly in the CAD graphic as plane definition points.

In the overview window or in the point list select the points that should define the plane. Use the deviation vectors and various views to check whether you have really defined the desired plane.

### Point Cloud View

In the point cloud view, all object points and camera viewpoints are visible. The balanced plane through the selected points is displayed as a semi-transparent rectangular plane. If the selected points are not in a plane, blue cubes may also be visible. These mark the base points of the points used for plane definition in the plane.

### Point List

Here all points and their deviations to the balanced plane are shown once again. The points defining the spatial plane are marked as accepted and are numbered and displayed in a different colour in the point cloud view.

### Input field for point numbers

You can define a spatial plane by entering the point numbers manually. This can be helpful for huge point clouds if you don't want to "trudge" through the lists. All accepted points are also listed here for a quick check.

### Name of the new plane

Enter a name here for a better overview. The plane number will be assigned automatically and consecutively by ELCOVISION 10.

### Define parallel plane

Another dialog will be opened to create a plane parallel to any plane.

### Define Perpendicular Plane

Opens another dialog to create a plane perpendicular to any plane by 2 points.

## Definition of a Parallel plane

### Plane parallel to

Select an existing plane from the list or define a plane parallel to the coordinate axes.

### Distance to above Plane

This is the perpendicular distance to the selected plane. The direction depends on the definition of the plane. The coordinate system of the plane is an orthogonal right system. The plane is the XY plane of this system. If you are not sure whether the distance must be entered as positive or negative, check the parallel plane in the graphical representation in the Define Spatial Plane window after you have entered the parallel displacement. First define the parallel plane with clear (negative or positive) distance (1m or 2m), and compare it with the original plane. If the direction of the parallel plane is clear, define the actual parallel plane.

### Plane trough point

You can also define a parallel plane by a point, select one here or click on it in the point cloud view in the previous dialog.

## Definition of a Perpendicular Plane

Plane perpendicular to

Select an existing plane from the list, or define a plane perpendicular to the coordinate axes.

### Plane through points

Select here the points through which the plane should pass. You can also click the points in the point cloud view or list in the "Define Spatial Plane" dialog.