When an Image Terrain is selected, the SELECTION - TOOLS menu becomes available. The TOOLS for Image Terrain menu contains tools that allow you to change the display order of your Image Terrains, clip the Image Terrain to a specified size, set transparency percentage, and set the color of the NoData values.



Mosaic Tools Group


IconNameDescription
Move UpMoves the currently selected Image Terrain up in the order of displayed Image Terrains. Any Image Terrain items 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 Terrain items. Any Image Terrains displayed are shown in order, from top to bottom on all areas of overlap.
ClipCrops an Image Terrain to the area defined within a 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 lines is cropped out.
UnclipThe Unclip icon is shown when you select a clipped Image Terrain. When you Unclip the Image Terrain, the terrain data that was cropped out by the Clip function is returned to its original state.


Transparency Group


IconNameDescription
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TransparencySets a transparency level for the selected Image Terrain.
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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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ToleranceAs 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.