When an Image terrain is selected, the SELECTION - TOOLS menu becomes available. The TOOLS menu contains tools that allow you to change the ordering of your Image terrains, clip the Image terrains, or set other transparency or NoData values.



Mosaic Tools Group


IconNameDescription
Move UpMoves the currently selected Image terrain up in the order of displayed Image terrains. Any Image terrains displayed are shown in a set order, from top to bottom on all areas of overlap.
Move DownMoves the currently selected Image terrain down in the order of displayed Image terrains. Any Image terrains displayed are shown in order, from top to bottom on all areas of overlap.
ClipThe Clip function cuts an Image terrain down to the size of the selected Boundary item. Both the Boundary item and the Image terrain need to be selected to activate the Clip tool. Once used, any Image terrain data outside of the Boundary is removed.
UnclipThe Unclip icon when you select a clipped Image Terrain. When you Unclip the Image Terrain, the terrain data that was removed by the Clip function—outside of the Boundary—is returned to its original state.



Transparency Group


IconNameDescription
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TransparencySets a transparency level for the selected terrain. Any other Image terrain beneath the Image terrain becomes visible.
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NoDataAllows you to set NoData values for your Image terrain, including the color of NoData values and the tolerance.
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ColorAllows you to set the Color of your NoData values. Most photogrammetry software sets the NoData color to black. When imported into Virtual Surveyor, that color is assigned as the NoData value, and any areas on the image are considered NoData. For cases where the NoData value color was set to another color such as White, the color can be set in Virtual Surveyor.
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Tolerance
As the NoData value in Virtual Surveyor is based on color, the tolerance allows you to increase the color range around your selected color that is included as a NoData value.