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Arrow number table on a parcel map

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(@bernardc)
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This question, I assume, is one of the dumber ones, but here goes. On parcel survey maps made in the 1960s and 1980s, they have an arrow-like symbol pointed north (specifying grid north in the more recent versions). The arrow is divided into four boxes, each with a three or four digit number. I notice that this symbol no longer appears in maps made in the 1990s. See the examples below. What did this notation mean?

image
image
 
Posted : 09/02/2023 7:51 pm
(@holy-cow)
Posts: 25292
 

Where are you located??ÿ I don't recall ever seeing such arrows on any survey, ever.

 
Posted : 09/02/2023 8:06 pm
(@bernardc)
Posts: 25
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Contra Costa County, California. Zone 0403.

 
Posted : 09/02/2023 8:18 pm
(@rankin_file)
Posts: 4016
 

Iƒ??d like to see the whole sheet.?ÿ

 
Posted : 10/02/2023 12:13 am
dms330
(@dms330)
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I suspect your "dumb" question will stump most of us--I've never seen anything like that

Licensed Land Surveyor
Finger Lakes Region, Upstate New York

 
Posted : 10/02/2023 3:33 am
(@tickmagnet)
Posts: 177
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It looks like a County GIS index back when GIS's were on paper.

 
Posted : 10/02/2023 4:50 am
GaryG
(@gary_g)
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Parcel numbers of adjoing tracts?

 
Posted : 10/02/2023 6:00 am
(@edward-reading)
Posts: 559
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San Luis Obispo County uses an index grid with similar numbers. Ours are truncated NAD27 coords.

 
Posted : 10/02/2023 6:08 am
(@lurker)
Posts: 925
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I agree that it is likely signifying the adjoining something (map, parcel, index, file # etc) showing the north south east and west adjoiners.

 
Posted : 10/02/2023 7:28 am
(@holy-cow)
Posts: 25292
 

Might be unique to certain cities or counties in California

 
Posted : 10/02/2023 7:45 am
(@bernardc)
Posts: 25
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Topic starter
 

Attached are two examples of complete parcel maps and the annotated assessor's parcel map. I still can't figure out what those arrow-table notations mean.

 
Posted : 10/02/2023 10:54 am
GaryG
(@gary_g)
Posts: 572
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It's the first three or four digits of nad27 grid coordinates
?ÿ
?ÿ
?ÿ
CA 3-0403
162,040.528?ÿ(m)?ÿ
531,627.966?ÿ(usft)?ÿ
531,629.029?ÿ(ift)?ÿ
461,432.264?ÿ(m)?ÿ
1,513,882.354?ÿ(usft)?ÿ
1,513,885.382?ÿ(ift)?ÿ
-01 01 55.83
0.99993507
N/A
 
Posted : 10/02/2023 3:57 pm
(@edward-reading)
Posts: 559
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I feel like I read that further up the thread. ?????ÿ

 
Posted : 10/02/2023 5:07 pm
(@jerry-attrick)
Posts: 326
Reputable Member Customer
 

@gary_g?ÿ

OK, Mr. Brilliant Smart Pants. What does the 528 represent?

Ha! You are on the wrong coast, buddy.

Seriously kidding Mr. G.

JA, PLS, SoCal

 
Posted : 10/02/2023 7:27 pm
(@bernardc)
Posts: 25
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Topic starter
 

Thank you very much to you all, and especially Gary. The 528 is the Northing coordinate rounded to a kilo-foot. For small areas, the high and low values are the same when rounded to the kilo-foot.

 
Posted : 10/02/2023 10:08 pm
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