& Construction
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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing
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Professional CAD/CAM tools built on Inventor and AutoCAD
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:03
In ICM, you can edit a mesh using various objects to provide more detail and improve the representation of the underlying topography.
00:13
These mesh editing objects can be manually added or taken from external files,
00:19
layers displayed in the GeoPlan view, or objects within the network.
00:25
Roughness zones are one type of mesh editing object.
00:29
Often, the surface of a 2D zone can be made up of many different land covers with different associated roughness values.
00:38
To account for this variation, you can import roughness zones to spatially distribute
00:44
and vary the surface roughness of 2D elements within the 2D zone.
00:50
Here is an example of a small area with several roughness zones used to override the 2D zone roughness.
00:58
The default roughness for the 2D zone is set to 0.013, representing a typical manning’s n value for asphalt.
01:08
One way to define a roughness zone is to use a roughness value.
01:13
Double-click the first roughness zone, which represents a building, to open the Properties window.
01:19
This roughness polygon has a Roughness of 0.1 set to represent the high restriction the building would represent to flow.
01:29
This may be something that you chose to do in less detailed areas of the model.
01:34
Select the second roughness zone to open its Properties,
01:38
and notice that it has no Roughness value set, but instead uses a Roughness definition.
01:45
This enables the roughness to be defined as a function of depth.
01:50
Click the arrow to open the Roughness definition, or to add a new one.
01:56
You can also access the Roughness definition tab using a new polygon window.
02:02
The roughness definition with multiple roughness values is defined as a smoothed step function.
02:09
Here, the values represent tall grass that flattens at Depth threshold 1, and therefore, has a reduced Roughness 2 value.
02:20
Returning to the roughness zone Properties, there are two final options.
02:26
The Exclude roughness zone boundary when creating 2D mesh
02:30
is set by default and recommended to help prevent geometry conflicts.
02:35
Also, a Priority field was added in version 2023.2.
02:41
If a zone overlaps another roughness zone,
02:45
the overlapping part of the zone with the lowest priority value has precedence over a zone with a higher priority value.
02:53
To include these changes to roughness zones in the mesh, it needs to be regenerated.
02:60
Once it has been loaded into the network, you can view the roughness as a color-coded theme.
03:06
Right-click the GeoPlan and select Properties & Themes.
03:12
Select the 2D Zone object layer, and then, in the Theme column, click Edit.
03:19
In the Layer Theme Editor, click Add New.
03:23
Expand the Field drop-down and select 2DTriangle.Roughness_value.
03:31
Expand the Range drop-down and select Individual, which allows you to select different colors for different roughness values.
03:40
Under Ranged Themes, use the Line Color drop-downs to select each color,
03:46
or click Auto-Theme repeatedly to browse through color schemes.
03:52
When you are happy with the theme, click OK, and then OK again to close the Properties and Themes dialog.
04:01
The GeoPlan now shows a color-coded distribution of the different roughness values.
Video transcript
00:03
In ICM, you can edit a mesh using various objects to provide more detail and improve the representation of the underlying topography.
00:13
These mesh editing objects can be manually added or taken from external files,
00:19
layers displayed in the GeoPlan view, or objects within the network.
00:25
Roughness zones are one type of mesh editing object.
00:29
Often, the surface of a 2D zone can be made up of many different land covers with different associated roughness values.
00:38
To account for this variation, you can import roughness zones to spatially distribute
00:44
and vary the surface roughness of 2D elements within the 2D zone.
00:50
Here is an example of a small area with several roughness zones used to override the 2D zone roughness.
00:58
The default roughness for the 2D zone is set to 0.013, representing a typical manning’s n value for asphalt.
01:08
One way to define a roughness zone is to use a roughness value.
01:13
Double-click the first roughness zone, which represents a building, to open the Properties window.
01:19
This roughness polygon has a Roughness of 0.1 set to represent the high restriction the building would represent to flow.
01:29
This may be something that you chose to do in less detailed areas of the model.
01:34
Select the second roughness zone to open its Properties,
01:38
and notice that it has no Roughness value set, but instead uses a Roughness definition.
01:45
This enables the roughness to be defined as a function of depth.
01:50
Click the arrow to open the Roughness definition, or to add a new one.
01:56
You can also access the Roughness definition tab using a new polygon window.
02:02
The roughness definition with multiple roughness values is defined as a smoothed step function.
02:09
Here, the values represent tall grass that flattens at Depth threshold 1, and therefore, has a reduced Roughness 2 value.
02:20
Returning to the roughness zone Properties, there are two final options.
02:26
The Exclude roughness zone boundary when creating 2D mesh
02:30
is set by default and recommended to help prevent geometry conflicts.
02:35
Also, a Priority field was added in version 2023.2.
02:41
If a zone overlaps another roughness zone,
02:45
the overlapping part of the zone with the lowest priority value has precedence over a zone with a higher priority value.
02:53
To include these changes to roughness zones in the mesh, it needs to be regenerated.
02:60
Once it has been loaded into the network, you can view the roughness as a color-coded theme.
03:06
Right-click the GeoPlan and select Properties & Themes.
03:12
Select the 2D Zone object layer, and then, in the Theme column, click Edit.
03:19
In the Layer Theme Editor, click Add New.
03:23
Expand the Field drop-down and select 2DTriangle.Roughness_value.
03:31
Expand the Range drop-down and select Individual, which allows you to select different colors for different roughness values.
03:40
Under Ranged Themes, use the Line Color drop-downs to select each color,
03:46
or click Auto-Theme repeatedly to browse through color schemes.
03:52
When you are happy with the theme, click OK, and then OK again to close the Properties and Themes dialog.
04:01
The GeoPlan now shows a color-coded distribution of the different roughness values.
In ICM, a mesh can be edited using various objects to provide more detail and improve the representation of the underlying topography. These mesh editing objects can be manually added or taken from external files, layers displayed in the GeoPlan view, or objects within the network.
Roughness zones are one type of mesh editing object. Often, the surface of a 2D zone can be made up of many different land covers with different associated roughness values. To account for this variation, roughness zones can be imported to spatially distribute and vary the surface roughness of 2D elements within the 2D zone.
This example investigates several roughness zones previously defined to override the 2D zone roughness. The default roughness for the 2D zone is set to 0.013, representing a typical manning’s n value for asphalt.
One way to define a roughness zone is to use a roughness value:
In the Properties window, this roughness polygon has a Roughness of 0.1 set to represent the high restriction the building would represent to flow. This may be something to use in less detailed areas of the model.
Notice that it has no Roughness value set, but instead uses a Roughness definition. This allows the roughness to be defined as a function of depth.
Alternatively, access the Roughness definition tab using a new polygon window:
The roughness definition with multiple roughness values is defined as a smoothed step function. Here, the values represent tall grass that flattens at Depth threshold 1, and therefore, has a reduced Roughness 2 value.
A Priority field was added in version 2023.2. If a zone overlaps another roughness zone, the overlapping part of the zone with the lowest priority value has precedence over a zone with a higher priority value.
Once the mesh is loaded into the network, view the roughness as a color-coded theme:
The GeoPlan now shows a color-coded distribution of the different roughness values.
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