Sight Distance Overlay - Revision history

Frank@tygron.nl at 15:50, 2 February 2024

2024-02-02T15:50:33Z

← Older revision		Revision as of 15:50, 2 February 2024
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	}}		}}

			{{SightDistanceOverlay nav}}
	{{Overlay nav}}		{{Overlay nav}}

Frank@tygron.nl: /* Results */

2024-02-02T13:52:09Z

Results

← Older revision		Revision as of 13:52, 2 February 2024
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	==Results==		==Results==
	The results of the [[Grid Overlay]] is a grid which shows, for each location, whether there is a line-of-sight to any [[Item]] configured to compute a line-of-sight from. And if so, what the minimum distance is to any such [[Item]].		The results of the [[Grid Overlay]] is a grid which shows, for each location, whether there is a line-of-sight to any [[Item]] configured to compute a line-of-sight from. And if so, what the minimum distance is to any such [[Item]].
			{{result types\|
			{{:Sight result type (Sight Distance Overlay)}}
			}}


	{{article end		{{article end

Frank@tygron.nl at 16:09, 31 January 2024

2024-01-31T16:09:16Z

← Older revision		Revision as of 16:09, 31 January 2024
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	{{:Observer height m (Sight Distance Overlay)}}		{{:Observer height m (Sight Distance Overlay)}}
	{{:Source height m (Sight Distance Overlay)}}		{{:Source height m (Sight Distance Overlay)}}
			}}

	==Calculation==		==Calculation==

Frank@tygron.nl at 16:09, 31 January 2024

2024-01-31T16:09:05Z

← Older revision		Revision as of 16:09, 31 January 2024
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	===Attributes===		===Attributes===
	The Sight Distance Overlay has one configurable model [[Attribute]] which defines a minimum height from which the line-of-sight should be calculated.		The Sight Distance Overlay has one configurable model [[Attribute]] which defines a minimum height from which the line-of-sight should be calculated.
	{{~~Overlay~~ attributes\|suppresscategory=true\|		{{overlay attributes\|suppresscategory=true\|allowselflinks=true\|
	{{:~~Source height~~ m (Sight Distance Overlay)}}		{{:Distance zone m (Sight Distance Overlay)}}
	{{:Observer height m (Sight Distance Overlay)}}		{{:Attribute timeframes (Sight Distance Overlay)}}
	}}		{{:Observer height m (Sight Distance Overlay)}}
			{{:Source height m (Sight Distance Overlay)}}

	==Calculation==		==Calculation==

Frank@tygron.nl: /* Attributes */

2024-01-31T11:55:51Z

Attributes

← Older revision		Revision as of 11:55, 31 January 2024
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	{{Overlay attributes\|suppresscategory=true\|		{{Overlay attributes\|suppresscategory=true\|
	{{:Source height m (Sight Distance Overlay)}}		{{:Source height m (Sight Distance Overlay)}}
			{{:Observer height m (Sight Distance Overlay)}}
	}}		}}

Frank@tygron.nl at 11:51, 28 September 2023

2023-09-28T11:51:48Z

← Older revision		Revision as of 11:51, 28 September 2023
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	* [[Average Overlay]]		* [[Average Overlay]]
	* [[Distance Overlay]]		* [[Distance Overlay]]
			* [[Travel Distance Overlay]]
	}}		}}

	{{Overlay nav}}		{{Overlay nav}}

Frank@tygron.nl at 11:18, 28 September 2023

2023-09-28T11:18:33Z

← Older revision		Revision as of 11:18, 28 September 2023
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	[[File:Distance_sight_overlay.jpg\|right\|thumb\|Sight Distance Overlay]]		[[File:Distance_sight_overlay.jpg\|right\|thumb\|Sight Distance Overlay]]
	The [[Sight Distance Overlay]] is a [[Grid Overlay]] which combines the distance calculation of the [[Distance ~~Zone~~ Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].		The [[Sight Distance Overlay]] is a [[Grid Overlay]] which combines the distance calculation of the [[Distance Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].
	{{clear}}		{{clear}}

Frank@tygron.nl: /* Results */

2023-09-28T11:17:58Z

Results

← Older revision		Revision as of 11:17, 28 September 2023
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	\|seealso=		\|seealso=
	* [[Average Overlay]]		* [[Average Overlay]]
	* [[Distance ~~Zone~~ Overlay]]		* [[Distance Overlay]]
	}}		}}

	{{Overlay nav}}		{{Overlay nav}}

Frank@tygron.nl at 09:58, 28 September 2023

2023-09-28T09:58:50Z

← Older revision		Revision as of 09:58, 28 September 2023
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	[[File:Distance_sight_overlay.jpg\|right\|thumb\|Sight Distance Overlay]]		[[File:Distance_sight_overlay.jpg\|right\|thumb\|Sight Distance Overlay]]
	The Sight Distance Overlay is a [[Grid Overlay]] which combines the distance calculation of the [[Distance Zone Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].		The [[Sight Distance Overlay]] is a [[Grid Overlay]] which combines the distance calculation of the [[Distance Zone Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].
	{{clear}}		{{clear}}

Frank@tygron.nl at 09:39, 28 September 2023

2023-09-28T09:39:47Z

← Older revision		Revision as of 09:39, 28 September 2023
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	[[File:Distance_sight_overlay.jpg\|right\|thumb\|Distance ~~Sight~~ Overlay]]		[[File:Distance_sight_overlay.jpg\|right\|thumb\|Sight Distance Overlay]]
	The Distance ~~Sight~~ Overlay is a [[Grid Overlay]] which combines the distance calculation of the [[Distance Zone Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].		The Sight Distance Overlay is a [[Grid Overlay]] which combines the distance calculation of the [[Distance Zone Overlay]] with a line-of-sight calculation. The [[Overlay]] calculates whether specific [[Grid cell]]s have a line of sight to [[Item]]s which define a distance zone around them, and if so will record the distance to any such [[Item]].
	{{clear}}		{{clear}}

	==Configuration==		==Configuration==
	The Distance ~~Sight~~ Overlay's calculation model has a number of aspects which can be configured:		The Sight Distance Overlay's calculation model has a number of aspects which can be configured:
	* The distances to calculate the lines-of-sight across		* The distances to calculate the lines-of-sight across
	* The height from which to compute the lines-of-sight		* The height from which to compute the lines-of-sight

	===Keys===		===Keys===
	A single [[Overlay Key]] can be defined. This defines which [[Attribute]] the Distance ~~Sight~~ Overlay should look for in data in the [[Project]]. When found, the [[Item]] on which it is found is considered a source for drawing a line-of-sight from. The value of that [[Attribute]] is the maximum distance a line-of-sight may extend from that [[Item]].		A single [[Overlay Key]] can be defined. This defines which [[Attribute]] the Sight Distance Overlay should look for in data in the [[Project]]. When found, the [[Item]] on which it is found is considered a source for drawing a line-of-sight from. The value of that [[Attribute]] is the maximum distance a line-of-sight may extend from that [[Item]].
	{{Overlay keys\|suppresscategory=true\|		{{Overlay keys\|suppresscategory=true\|
	{{:Distance zone m (Distance ~~Sight~~ Overlay)}}		{{:Distance zone m (Sight Distance Overlay)}}
	}}		}}

	===Attributes===		===Attributes===
	The Distance ~~Sight~~ Overlay has one configurable model [[Attribute]] which defines a minimum height from which the line-of-sight should be calculated.		The Sight Distance Overlay has one configurable model [[Attribute]] which defines a minimum height from which the line-of-sight should be calculated.
	{{Overlay attributes\|suppresscategory=true\|		{{Overlay attributes\|suppresscategory=true\|
	{{:Source height m (Distance ~~Sight~~ Overlay)}}		{{:Source height m (Sight Distance Overlay)}}
	}}		}}

	==Calculation==		==Calculation==
	The Distance ~~Sight~~ Overlay performs a line-of-sight calculation between any two cells.		The Sight Distance Overlay performs a line-of-sight calculation between any two cells.

	For each [[Grid cell]], all other grid cells within a {{Max distance overlay}} meter radius are checked whether they are considered a source for a line-of-sight calculation. If so, all cells between the computed cell and the source cell are checked for their [[Digital surface model\|computed height]]. If that height would block the line-of-sight between the source cell and computed cell, the check for that particular calculation ends. If the line-of-sight is uninterrupted for all intermediate cells, the value computed for the computed cell is the distance between the source and the computed cell.		For each [[Grid cell]], all other grid cells within a {{Max distance overlay}} meter radius are checked whether they are considered a source for a line-of-sight calculation. If so, all cells between the computed cell and the source cell are checked for their [[Digital surface model\|computed height]]. If that height would block the line-of-sight between the source cell and computed cell, the check for that particular calculation ends. If the line-of-sight is uninterrupted for all intermediate cells, the value computed for the computed cell is the distance between the source and the computed cell.