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5.01 Orthophotos

What is an orthophoto?

An orthophoto is the perpendicular projection of a selected range of points in the point cloud to a horizontal or vertical plane.
To generate an orthophoto, you must define the range (volume) of the point cloud and the plane you want to project the points. Use orthophotos for generating sections, elevations, and floor plan representations from the point cloud.

BIMmTool Pro offers a native generation of orthophotos via the Orthophoto functions of the BIMmTool Palette.


Horizontal orthophoto

A horizontal orthophoto is the vertical projection of a point cloud cutout to a horizontal plane. It results in a floor plan-like representation of the point cloud.

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Activate the Horizontal Orthophoto command in the BIMmTool Palette.

Draw the contours of the orthophoto rectangle on the floor plan.

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Give a name to the orthophoto.

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Define the projection clipping box's lower and upper edge height in the Archicad info box.
Ideally, the lower edge is somewhat above the floor level, and the upper edge is approx 10 cm above the window sill height.


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Click Calculate to generate the orthophoto.


Vertical orthophoto

A vertical orthophoto is the horizontal projection of a point cloud cutout to a vertical plane. It results in a section- or elevation-like representation of the point cloud.

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Activate the Vertical Orthophoto command in the BIMmTool Palette.
Draw the contours of the orthophoto rectangle on the floor plan.

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Give a name to the orthophoto.

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Define the projection clipping box's lower and upper edge height in the Archicad info box.
When you take the first section orthophoto of your building, consider that the lower edge should be lower than the lowest scanner tripod elevation, and the upper edge should be above the roof pitch.
image.png Click Calculate to generate the orthophoto.


Orthophoto library element settings

BIMmTool has a dedicated library that loads automatically into Archicad after installing BIMmTool. The orthophoto boundary boxes and their associated functions are stored as library elements in the BIMmTool Library. You can modify the parameters of the individual elements just like you do with a generic Archicad object. 

Select your orthophoto boundary box and open the object settings in Archicad.

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You can review the settings to your orthophoto object under the Custom Settings tab of the Object settings dialog box.

Its first page "Orthophoto settings" allows you to modify

  • the name of the selected orthophoto object.
  • The pixel size used for generating the orthophoto.
  • The number of pixels per image tile, where the tile size is fixed in 5,00 meter x 5,00 meter squares.
  • The render type of the photo: color or grayscale.


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On the "Appearance 1 page for vertical orthophotos or "Appareance" page for horizontal orthophotos, you can define the projection plane representation:

  • Pen color.
  • Line type.
  • Surface material.

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On the "Appearance 2" page for vertical orthophotos, you can set the arrow parameters on the floor plan:

  • Width.
  • Height.
  • Distance from projection line.
  • Fill properties.
 

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