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TerraPhoto User Guide

Navigation: Tool Reference > TerraPhoto Window > Images pulldown menu

Transform positions

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Transform positions

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Transform positions command changes the positions of images in the image list by applying a transformation. You can apply a transformation from WGS84 coordinates to a projection system and/or a user-defined transformation.

The projection systems and transformations must be defined in the Coordinate transformations categories of TerraPhoto Settings.

To transform image list positions:

1. Select Transform positions command from the Images pulldown menu.

This opens the Transform image coordinates dialog:

transform_image_coordinates

2. Select settings and click OK.

This transforms the image positions for the active image list.

3. Save the image list using Save list or Save list As commands from the Images pulldown menu in order to save the changes into an image list file.

SETTING

EFFECT

Apply to

Images to transform:

All images - all images in the image list.

Selected images - selected images only. This requires the selection of images in the image list before the command is started.

WGS84

Target projection system for applying a transformation from WGS84 coordinates to the given projection system. You can choose from any of the built-in or user-defined projections systems which are set as active in Coordinate transformations / Builtin projection systems, Coordinate transformations / US State Planes, and Coordinate transformations / User projection systems of TerraPhoto Settings.

Transform

User-defined transformation to apply:

None - no user-defined transformation is applied.

Dz - a systematic elevation correction is applied to the image positions.

Dxyz - translation values stored in a text file are applied the image positions.

Add lever - a lever arm correction is applied to the image positons.

<transformation> - any transformation that is defined in Coordinate transformations / Transformations of TerraPhoto Settings.

Dz

Value by which images are transformed in elevation. This is only active if Transform is set to Dz.

Dxyz

Location and name of a file that contains transformation values. The format of the text file is X Y dX dY dZ. This is only active if Transform is set to Dxyz.

Lever arm X

X value of a lever arm vector added to image positions. Refers to the left/right direction relative to the movement direction. A positive value moves the image position to the right, a negative value to the left. This is only active if Transform is set to Add lever.

Lever arm Y

Y value of a lever arm vector added to image positions. Refers to the forward/backward direction relative to the movement direction. A positive value moves the image position forward, a negative value backward. This is only active if Transform is set to Add lever.

Lever arm Z

Z value of a lever arm vector added to image positions. Refers to the vertical direction. A positive value moves the image position up, a negative value down. This is only active if Transform is set to Add lever.

TerraPhoto User Guide   05.07.2021   © 2021 Terrasolid Ltd