Using the Diff Tool

Using the Diff Tool

The Diff tool (  ) in the top tool bar allows for viewing two flights of the same site side-by-side to detect differences.  The Diff function is available only for the 2.5D Terrain and Surface views.  If while in the Diff view the user switches to 3D Texture or Point Cloud, the Diff function is turned off automatically.   To use this function, follow the steps below:


A.  Open a flight in an existing site that has multiple flights.



B.  Click on the Diff tool in the upper right corner, which will show a list of available flights.



C.  Select one of the flights available, which will split the screen in the center an open the selected flight on the right side showing a slider center-line with the dates of the flights on each side.


D.  Slide the center-line right and left to see the differences.



E.  You may zoom in and out, and you may pan the view to your area of interest.


F.   You may also tilt the model using the mouse wheel click and drag.  The first time the diff view is shown tilted, you will get a message that indicates the the elevation value (the Z value on the bottom right corner as well as the displayed elevation of the model on the right) is the always the elevation of of the source model, which is the one on the left side.   See below.

In other words, the model on the right side is clamped to the elevation of the model of the left.

G.  To leave the Diff view simply click on the “X” on the Diff tool.






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