Ground sample distance GSD - Revision history

Designing Buildings at 11:23, 13 March 2023

2023-03-13T11:23:01Z

← Older revision		Revision as of 11:23, 13 March 2023
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	[https://www.historicenvironment.scot/archives-and-research/publications/publication/?publicationId=9b35b799-4221-46fa-80d6-a8a8009d802d Applied digital documentation In the historic environment], published on 19 March 2018 by Historic Scotland, defines ground sample distance (GSD) as: ‘The known real-world scale of an image pixel.’		[https://www.historicenvironment.scot/archives-and-research/publications/publication/?publicationId=9b35b799-4221-46fa-80d6-a8a8009d802d Applied digital documentation In the historic environment], published on 19 March 2018 by Historic Scotland, defines ground sample distance (GSD) as: ‘The known real-world scale of an image pixel.’
		+
		+	[https://www.rics.org/profession-standards/rics-standards-and-guidance/sector-standards/land-standards/earth-observation-and-aerial-surveys Earth observation and aerial surveys], RICS professional standard, 6th edition, September 2021, published on 4 January 2022 by the Royal Institution of Chartered Surveyors (RICS), defines ground-sampled distance (GSD) as: ‘The distance between the centres of two consecutive pixels on the ground. GSD is a common way to define and refer to the spatial resolution of Earth observation and aerial imagery.’

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Designing Buildings at 09:46, 12 May 2022

2022-05-12T09:46:46Z

← Older revision		Revision as of 09:46, 12 May 2022
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	GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have serious consequences. If a small mistake is extrapolated over a large number of pixels, it can result in significant discrepancies between the map and reality. To prevent this, use the smallest practical value to calculate GSD. An accurately selected GSD will allow the mapping device to generate detailed images while flying high enough to minimise the number of required photos.		GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have serious consequences. If a small mistake is extrapolated over a large number of pixels, it can result in significant discrepancies between the map and reality. To prevent this, use the smallest practical value to calculate GSD. An accurately selected GSD will allow the mapping device to generate detailed images while flying high enough to minimise the number of required photos.
		+
		+	[https://www.historicenvironment.scot/archives-and-research/publications/publication/?publicationId=9b35b799-4221-46fa-80d6-a8a8009d802d Applied digital documentation In the historic environment], published on 19 March 2018 by Historic Scotland, defines ground sample distance (GSD) as: ‘The known real-world scale of an image pixel.’

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Designing Buildings at 07:51, 30 November 2021

2021-11-30T07:51:00Z

← Older revision		Revision as of 07:51, 30 November 2021
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−	In digital photos taken from the air, a ground sample distance (GSD) - or ground sampling distance - is a calculation used to explain how the real world scale established by ground control points (GCPs) translates to a map. They can also be referred to as ground projected sample interval (GSI) or ground projected instantaneous field of view (GIFOV).	+	In digital photos taken from the air, a ground sample distance (GSD) - or ground sampling distance - is a calculation used to explain how the real world scale established by ground control points (GCPs) translates onto a map. They can also be referred to as ground projected sample interval (GSI) or ground projected instantaneous field of view (GIFOV).

−	Aerial surveys incorporate GSDs as a factor for generating accurate maps and models. It can be a useful calculation in several sectors, including:	+	Aerial surveys incorporate GSDs as a factor for generating accurate maps and models. It can be a useful calculation in several sectors, including construction, cartography, mining and so on.

−	* Architecture.	+	GSDs can be incorporated into photogrammetry and aerial photography which can be used to create three dimensional topographic maps.The GSD describes the distance between the centre point of two consecutive pixels on a digital image. Without an accurate GSD, it can be difficult for surveyors to convert collected data into a usable map.
−	* Cartography.	+
−	* Construction.	+
−	* Firefighting.	+
−	* Mining.	+
−	* Land boundaries.	+

−	GSDs can be incorporated into photogrammetry and aerial photography which can be used to create three dimensional topographic maps.The GSD describes the distance between the centre point of two consecutive pixels on a digital image. Without an accurate GSD, it can be difficult for surveyors to convert their collected data into a usable map.	+	GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have serious consequences. If a small mistake is extrapolated over a large number of pixels, it can result in significant discrepancies between the map and reality. To prevent this, use the smallest practical value to calculate GSD. An accurately selected GSD will allow the mapping device to generate detailed images while flying high enough to minimise the number of required photos.
−		+
−	GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have consequences ~~for the wider scope of a project, including long term implications~~. If a small mistake is extrapolated over a large number of pixels, it can result in ~~inaccuracies~~ between the map and reality.	+
−		+
−	To prevent this ~~from happening~~, ~~it is usually recommended to~~ use the smallest ~~possible~~ value to calculate GSD. An accurately selected GSD will allow the mapping device to generate detailed images while flying high enough to minimise the number of required photos.	+

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Editor at 22:00, 29 November 2021

2021-11-29T22:00:20Z

← Older revision		Revision as of 22:00, 29 November 2021
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	* Ground control point GCP.		* Ground control point GCP.
	* Photogrammetry.		* Photogrammetry.
		+	* Universal transverse mercator projection.
	* Uses of drones in construction.		* Uses of drones in construction.

	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Definitions]] [[Category:Research_/_Innovation]] [[Category:Construction_techniques]] [[Category:Products_/_components]]		[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Definitions]] [[Category:Research_/_Innovation]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Editor at 21:32, 29 November 2021

2021-11-29T21:32:32Z

← Older revision		Revision as of 21:32, 29 November 2021
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	GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have consequences for the wider scope of a project, including long term implications. If a small mistake is extrapolated over a large number of pixels, it can result in inaccuracies between the map and reality.		GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have consequences for the wider scope of a project, including long term implications. If a small mistake is extrapolated over a large number of pixels, it can result in inaccuracies between the map and reality.

−	To prevent this from happening, it is usually recommended to use the smallest possible value to calculate GSD. An accurately selected GSD will allow mapping device to generate detailed images while flying high enough to minimise the number of required photos.	+	To prevent this from happening, it is usually recommended to use the smallest possible value to calculate GSD. An accurately selected GSD will allow the mapping device to generate detailed images while flying high enough to minimise the number of required photos.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

−	Photogrammetry	+	* Architectural photography.
		+	* Construction drones.
		+	* Digital mapping and cartography.
		+	* Ground control point GCP.
		+	* Photogrammetry.
		+	* Uses of drones in construction.
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Definitions]] [[Category:Research_/_Innovation]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

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2021-11-29T21:27:47Z

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In digital photos taken from the air, a ground sample distance (GSD) - or ground sampling distance - is a calculation used to explain how the real world scale established by ground control points (GCPs) translates to a map. They can also be referred to as ground projected sample interval (GSI) or ground projected instantaneous field of view (GIFOV).

Aerial surveys incorporate GSDs as a factor for generating accurate maps and models. It can be a useful calculation in several sectors, including:

* Architecture.
* Cartography.
* Construction.
* Firefighting.
* Mining.
* Land boundaries.

GSDs can be incorporated into photogrammetry and aerial photography which can be used to create three dimensional topographic maps.The GSD describes the distance between the centre point of two consecutive pixels on a digital image. Without an accurate GSD, it can be difficult for surveyors to convert their collected data into a usable map.

GSD calculations that are inaccurate by very small increments - even as little as a few centimetres - may have consequences for the wider scope of a project, including long term implications. If a small mistake is extrapolated over a large number of pixels, it can result in inaccuracies between the map and reality.

To prevent this from happening, it is usually recommended to use the smallest possible value to calculate GSD. An accurately selected GSD will allow mapping device to generate detailed images while flying high enough to minimise the number of required photos.

= Related articles on Designing Buildings =

Photogrammetry