2920: Survey Marker - Revision history

162.158.155.53 at 21:46, 27 May 2025

2025-05-27T21:46:27Z

CalibansCreations: /* Explanation */

2025-04-01T11:24:51Z

‎Explanation

B for brain: /* Explanation */

2024-04-24T20:46:08Z

‎Explanation

Asdf: /* Transcript */ minor punctuation

2024-04-17T22:47:02Z

‎Transcript: minor punctuation

Asdf: /* Explanation */ it is a fun fact, though

2024-04-17T22:15:26Z

‎Explanation: it is a fun fact, though

42.book.addict at 21:45, 17 April 2024

2024-04-17T21:45:29Z

42.book.addict at 21:45, 17 April 2024

2024-04-17T21:45:06Z

162.158.146.163: Stretched or compressed objects as a result of the new markers.

2024-04-17T14:59:42Z

Stretched or compressed objects as a result of the new markers.

Asdf: /* Transcript */

2024-04-17T14:41:21Z

‎Transcript

Asdf: /* Explanation */

2024-04-17T14:40:08Z

‎Explanation

@@ Line 10: / Line 10: @@
 ==Explanation==
-[[Cueball]] and [[Megan]] have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.
+[[Cueball]] and [[Megan]] have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2025-2026), which is primarily based on satellite systems and gravimetric models.
 When they update the database in the comic, Cueball's position, both horizontal and vertical, changes to compensate, leaving him panicking in mid-air. In reality, updating a database to change the coordinates of a location would not physically move items at the location.{{Citation needed}} Arguably, if they did, no one would notice much, since everything surrounding them should similarly move simultaneously to its corrected position as well. On the other hand, if the markers were updated and moved relative to each other, and (as the comic suggests) items shifted based to match the new markers, this could mean that objects would be stretched or compressed depending on whether the new markers were closer or further away from each other from their previous positions. However, in the comic, the only things whose position is 'known' (and can therefore be 'corrected') are those that are directly on a marker, hence why this shifting does not seem to apply to Megan (or her phone).

@@ Line 10: / Line 10: @@
 ==Explanation==
-Cueball and Megan have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.
+[[Cueball]] and [[Megan]] have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.
 When they update the database in the comic, Cueball's position, both horizontal and vertical, changes to compensate, leaving him panicking in mid-air. In reality, updating a database to change the coordinates of a location would not physically move items at the location.{{Citation needed}} Arguably, if they did, no one would notice much, since everything surrounding them should similarly move simultaneously to its corrected position as well. On the other hand, if the markers were updated and moved relative to each other, and (as the comic suggests) items shifted based to match the new markers, this could mean that objects would be stretched or compressed depending on whether the new markers were closer or further away from each other from their previous positions. However, in the comic, the only things whose position is 'known' (and can therefore be 'corrected') are those that are directly on a marker, hence why this shifting does not seem to apply to Megan (or her phone).

← Older revision		Revision as of 20:46, 24 April 2024
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	==Explanation==		==Explanation==
−	~~{{incomplete\|Created by a GUIDED MISSILE THAT MISSED THE TARGET DUE TO COORDINATE DRIFT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}~~
	Cueball and Megan have found a {{w\|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w\|North American Datum\|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w\|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w\|National Spatial Reference System#Datum of 2022\|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.		Cueball and Megan have found a {{w\|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w\|North American Datum\|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w\|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w\|National Spatial Reference System#Datum of 2022\|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.

@@ Line 32: / Line 32: @@
 :Megan: But the NAD83 and NAVD88 datums are getting replaced soon. That marker's coordinates could shift by like 5 feet.
-:[Megan is looking down at her phone in her hand, standing in the same place in relation to the marker. Cueball is now floating in the air behind her about 5 feet above the ground, while flailing with his arms and legs (as shown with three small curved lines at the end of either arm and above and below him.)]
+:[Megan is looking down at her phone in her hand, standing in the same place in relation to the marker. Cueball is now floating in the air behind her about 5 feet above the ground, while flailing with his arms and legs (as shown with three small curved lines at the end of either arm and above and below him).]
 :Megan: Oh look, it just got updated.
 :Cueball: '''''Hey! Put me back!'''''

@@ Line 15: / Line 15: @@
 When they update the database in the comic, Cueball's position, both horizontal and vertical, changes to compensate, leaving him panicking in mid-air. In reality, updating a database to change the coordinates of a location would not physically move items at the location.{{Citation needed}} Arguably, if they did, no one would notice much, since everything surrounding them should similarly move simultaneously to its corrected position as well. On the other hand, if the markers were updated and moved relative to each other, and (as the comic suggests) items shifted based to match the new markers, this could mean that objects would be stretched or compressed depending on whether the new markers were closer or further away from each other from their previous positions. However, in the comic, the only things whose position is 'known' (and can therefore be 'corrected') are those that are directly on a marker, hence why this shifting does not seem to apply to Megan (or her phone).
-The title text refers to NAD 83 being around 7 feet off. This probably refers to the difference of {{w|North American Datum#Comparing NAD 83 to WGS 84|about 7.2 feet (2.2 m)}} in the positioning of the centers of the notional Earth ellipsoids used as the basis for NAD 83 and {{w|World Geodetic System|WGS 84}}.
+The title text refers to NAD 83 being around 7 feet off. This probably refers to the difference of {{w|North American Datum#Comparing NAD 83 to WGS 84|about 7.2 feet (2.2 m)}} in the positioning of the centers of the notional Earth ellipsoids used as the basis for NAD 83 and {{w|World Geodetic System|WGS 84}}. This is also one of [[Randall]]'s [[:Category:Fun fact|fun facts]].
 Absurd outcomes from differing survey standards was also the topic of [[2888: US Survey Foot]].
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 [[Category:Comics featuring Megan]]
 [[Category:Geography]]

← Older revision		Revision as of 21:45, 17 April 2024
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	[[Category:Comics featuring Megan]]		[[Category:Comics featuring Megan]]
	[[Category:Geography]]		[[Category:Geography]]
−	~~[[Category:Fun fact]]~~

@@ Line 13: / Line 13: @@
 Cueball and Megan have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models.
-When they update the database in the comic, Cueball's position, both horizontal and vertical, changes to compensate, leaving him panicking in mid-air. In reality, updating a database to change the coordinates of a location would not physically move items at the location.{{Citation needed}} Arguably, if they did, no-one would much notice, since everything surrounding them should similarly move simultaneously to its corrected position as well. However, in the comic, the only things whose position is 'known' (and can therefore be 'corrected') are those that are directly on a marker, hence why this shifting does not seem to apply to Megan (or her phone).
+When they update the database in the comic, Cueball's position, both horizontal and vertical, changes to compensate, leaving him panicking in mid-air. In reality, updating a database to change the coordinates of a location would not physically move items at the location.{{Citation needed}} Arguably, if they did, no-one would much notice, since everything surrounding them should similarly move simultaneously to its corrected position as well. On the other hand, if the markers were updated and moved relative to each other, and (as the comic suggests) items shifted based to match the new markers, this could mean that objects would be stretched or compressed depending on whether the new markers were closer or further away from each other from their previous positions. However, in the comic, the only things whose position is 'known' (and can therefore be 'corrected') are those that are directly on a marker, hence why this shifting does not seem to apply to Megan (or her phone).
 The title text refers to NAD 83 being around 7 feet off. This probably refers to the difference of {{w|North American Datum#Comparing NAD 83 to WGS 84|about 7.2 feet (2.2 m)}} in the positioning of the centers of the notional Earth ellipsoids used as the basis for NAD 83 and {{w|World Geodetic System|WGS 84}}.

@@ Line 29: / Line 29: @@
 :Cueball: If I stand on it, they know where '''''I''''' am.
-:[Cueball and Megan looks up at each other.]
+:[Cueball and Megan look up at each other.]
 :Megan: But the NAD83 and NAVD88 datums are getting replaced soon. That marker's coordinates could shift by like 5 feet.
-:[Megan is looking down at her phone in her hand, standing in the same place in relation to the marker. Cueball is now floating in the air behind her 5 feet above the ground, while flailing with his arms and legs (as shown with three small curved lines at the end of either arm and above and below him.)]
+:[Megan is looking down at her phone in her hand, standing in the same place in relation to the marker. Cueball is now floating in the air behind her about 5 feet above the ground, while flailing with his arms and legs (as shown with three small curved lines at the end of either arm and above and below him.)]
 :Megan: Oh look, it just got updated.
 :Cueball: '''''Hey! Put me back!'''''