Weir angle (Water Overlay): Difference between revisions

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{{overlay attribute
[[File:Weir_angle_explain_(Water_Overlay).png|thumb|right|x300px]]
|key=[[Weir_angle_(Water_Overlay)|WEIR_ANGLE]]
{{Overlay keys|<onlyinclude>
{{Overlay keys|type=row|group=Water Overlay
|key=WEIR_ANGLE
|unit={{geoangle}}
|unit={{geoangle}}
|description=The top down orientation angle of the weir.
|description=The top down orientation angle of the [[Weir (Water Overlay)|weir]].
|defaultvalue=0
|defaultvalue=0
|icon=[[File:waterwizard_icon_weir_angle.png]]
|icon=waterwizard_icon_weir_angle.png
|range=-{{doublemaxvalue}} to {{doublemaxvalue}}
}}</onlyinclude>}}
 
The weir angle is used to convert a weir loaded in as point-based data to a line which is used in the simulation to define from where to where the water should flow across the weir.
In the Water Wizard a weir angle is automatically generated. There are currently 4 options on how this is (automatically) generated:
# The weir is located on the edge of 2 water level areas. The weir is then automatically installed correctly and no message is displayed. A note about this option is necessary: The weirs are automatically well oriented, but the waterways are not blocked, which means that water can flow past the weirs. That is why we recommend using a dataset in which the attribute is already present, because then the block is in effect.
# The weir is located in exactly 1 level area. Then the warning appears that the weir has no angle, with the option to fix it.
# The weir is located in exactly 0 level areas. Then a comment is displayed about the absence of a water level area.
# The weir angle attribute is pre-added to a dataset and this dataset is imported into the project. No angle needs to be generated automatically.
 
[[File:Set_Multi_Weir_value.jpg|thumb|left|x200px|The weir angle is adjustable in the weir step of a [[Water Overlay]] wizard]]
{{article end
|notes=
* The width of the generated dam is equal to the weir's [[Weir width (Water Overlay)|WEIR_WIDTH]], multiplied by the [[Weir dam multiplier (Water Overlay)|WEIR_DAM_MULTIPLIER]] of the [[Water Overlay]].
* If a weir angle is available for a weir which is already line-shaped, the weir is first interpreted as a point, and then the direction and elevation are adjusted accordingly. The centre of the weir's polygon is used.
* If no angle is available as an attribute, the angle weir angles are automatically oriented based on the water level areas.
* The weir angle is automatically converted to a range within 0 and 360.
|seealso=
* [[Weir width (Water Overlay)]]
* [[Weir dam multiplier (Water Overlay)]]
|howtos=
}}
}}
==Notes==
[[File:Weir_angle_explain_(Water_Overlay).png|thumb|right|x300px]]
* This angle is used to generate a line for the front and back entries of the weir. Additionally, the elevation is also automatically adjusted for the region perpendicular to the weir angle.
* If no angle is available as an attribute, the angle can be calculated.


{{WaterOverlay hydraulic structure nav}}
{{WaterOverlay hydraulic structure nav}}

Latest revision as of 15:30, 26 February 2024

Weir angle explain (Water Overlay).png

The weir angle is used to convert a weir loaded in as point-based data to a line which is used in the simulation to define from where to where the water should flow across the weir. In the Water Wizard a weir angle is automatically generated. There are currently 4 options on how this is (automatically) generated:

  1. The weir is located on the edge of 2 water level areas. The weir is then automatically installed correctly and no message is displayed. A note about this option is necessary: The weirs are automatically well oriented, but the waterways are not blocked, which means that water can flow past the weirs. That is why we recommend using a dataset in which the attribute is already present, because then the block is in effect.
  2. The weir is located in exactly 1 level area. Then the warning appears that the weir has no angle, with the option to fix it.
  3. The weir is located in exactly 0 level areas. Then a comment is displayed about the absence of a water level area.
  4. The weir angle attribute is pre-added to a dataset and this dataset is imported into the project. No angle needs to be generated automatically.
The weir angle is adjustable in the weir step of a Water Overlay wizard

Notes

  • The width of the generated dam is equal to the weir's WEIR_WIDTH, multiplied by the WEIR_DAM_MULTIPLIER of the Water Overlay.
  • If a weir angle is available for a weir which is already line-shaped, the weir is first interpreted as a point, and then the direction and elevation are adjusted accordingly. The centre of the weir's polygon is used.
  • If no angle is available as an attribute, the angle weir angles are automatically oriented based on the water level areas.
  • The weir angle is automatically converted to a range within 0 and 360.

See also