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Matt_Bilskie

Transform Tool

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When using the transform tool, specfically the Depths <--> elevations option, I have noticed that if you check it and leave it as 0.0 that it reverses all node elevations (i.e. multiplying by negative 1). If I want to raise my elevations by 1 m, for example, and I put in 1 m, it lowers the elevations by 1 m. Is this a bug or am I using this tool incorrectly?

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Hi Matt,

The value that you are specifying is the water level you want to use as 0.0 in the new system. So if you have an elevation of 5.0 and you want to get a depth of -4.0, you would specify 1.0. The value of 1.0 becomes 0.0 in the transformed coordinates. If you want to get 6.0, you would specify a -1.0.

Does this make sense? If not, let me know and I'll take another stab at it.

When using the transform tool, specfically the Depths <--> elevations option, I have noticed that if you check it and leave it as 0.0 that it reverses all node elevations (i.e. multiplying by negative 1). If I want to raise my elevations by 1 m, for example, and I put in 1 m, it lowers the elevations by 1 m. Is this a bug or am I using this tool incorrectly?

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Hi Matt,

The value that you are specifying is the water level you want to use as 0.0 in the new system. So if you have an elevation of 5.0 and you want to get a depth of -4.0, you would specify 1.0. The value of 1.0 becomes 0.0 in the transformed coordinates. If you want to get 6.0, you would specify a -1.0.

Does this make sense? If not, let me know and I'll take another stab at it.

Hi Rusty,

OK, I think I understand.

I have been using this tool to raise and lower nodal elevations, but it is tricky. Is there a different way that I raise or lower elevations of selected nodes by a given value. For example, I have a small creek that produces an instability in my model. I want to raise the elevations of the nodes that depict the creek by 0.5 m, for example, to raise the creek, but still keep the small creek in the channel. I have been just using the transform tool and putting in 0.0 to flip the elevations from positive to negative, and then going back in a specifying, 0.5 for example, to flip them back and add 0.5 m to the nodal value.

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Hi Matt,

In the same dialog, there is an option for a translate. Translate your nodes by 0.0 for x and y and 1.0 to raise your nodes 1.0 m.

Cheers,

Rusty

Hi Rusty,

OK, I think I understand.

I have been using this tool to raise and lower nodal elevations, but it is tricky. Is there a different way that I raise or lower elevations of selected nodes by a given value. For example, I have a small creek that produces an instability in my model. I want to raise the elevations of the nodes that depict the creek by 0.5 m, for example, to raise the creek, but still keep the small creek in the channel. I have been just using the transform tool and putting in 0.0 to flip the elevations from positive to negative, and then going back in a specifying, 0.5 for example, to flip them back and add 0.5 m to the nodal value.

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