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TerraPhoto User Guide

Navigation: Project Workflow > Working with Tie Points > Point pulldown menu

Add known xyz

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Add known xyz

Add known xyz command lets you enter a new Known xyz tie point. Known xyz tie points are entered based on points for which the x, y, and z coordinates are known, for example, control points on the ground. The coordinates of the known points can be defined by snapping to vector elements drawn into the CAD file or by typing a key-in commandMicroStation or SpaccelSpatix.

To enter a new known xyz point:

1. Select Add known xyz command from the Point pulldown menu.

The Add known xyz point dialog opens:

tie_add_known_xyz

2. Define a Number for the new point. By default, the number increments automatically.

3. Enter the position of the known xyz point with a data click in a MicroStation view. You may snap to a vector element drawn in the CAD file in order to get the exact coordinates of the known point.

Alternatively, you can type a key-in commandMicroStation or SpaccelSpatix with the exact coordinates:

xy=212457.65,670960.11,73.45        MicroStation

xy=212457.65:670960.11:73.45        Spatix

The application adds the point to the list of tie points. All tie point pixels are undefined at this stage.

The application updates the Active detail view in order to show the known point location.

4. Enter the tie point position with a data click in the Active detail view.

The software computes and displays the mismatch between the tie point and the known point coordinates. It selects the next image with an undefined tie point pixel in the list and updates the Secondary detail view in order to show the tie point position.

5. Enter the tie point position with a data click in the Secondary detail view.

The software computes and displays the mismatch between the tie point and the known point coordinates. It selects the next image with an undefined tie point pixel in the list and updates the Secondary detail view in order to show the tie point position.

6. Continue with step 5 until all tie point pixels are defined.

7. After entering the last pixel of a tie point, you can continue with step 3 if you want to place the next Known xyz tie point.

If the tie point position can not be defined in one of the secondary images, you should select the next undefined pixel for this tie point and continue entering the tie point pixels. Use the Clean command from the Point pulldown menu in order to remove undefined pixels from a selected tie point.

TerraPhoto User Guide   05.07.2021   © 2021 Terrasolid Ltd