Levelling detail for

Benchmark positionning related to the tide gauge station

2002-03-04

2006-04-03

2013-07-02

Benchmarks description table

SOURCE : Fiche d'observatoire de marée SHOM n°3224

Levelling campain :

Benchmark	Latitude (°)	Longitude (°)	Height (m)	Distance to Tide Gauge (m)
A	----	----	12.500	----
B	----	----	12.581	----
C	----	----	12.392	----
D	----	----	11.426	----
F	----	----	11.722	----
G	----	----	10.767	----
H	----	----	10.250	----
I	----	----	11.876	----
J	----	----	---	----
aIGN	----	----	21.733	----
bIGN	----	----	21.710	----
cIGN	----	----	21.697	----
dIGN	----	----	21.792	----
L	----	----	11.880	----
N	----	----	21.797	----
O	----	----	11.904	----
K	----	----	---	----

Legend : Fondamental benchmark

Benchmarks vertical positionning diagram

Reference:

Leveling evolution

Stand point			cIGN	cIGN	cIGN	cIGN	C	C	A	A	A	A	A	A	A	L	I	D	D	D	D	H	H	G	G	J	J	bIGN
End point			bIGN	dIGN	N	aIGN	cIGN	A	B	G	H	A	C	D	F	A	A	F	A	I	C	D	C	A	D	A	D	dIGN
Distance (m)			----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----	----
Height difference (m)	Campaign 7	2024-04-18	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
	Campaign 6	2018-06-21	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
	Campaign 5	2013-07-02	0.0170 ± 0.001	0.0960 ± 0.001	0.1000 ± 0.001	0.0370 ± 0.001	9.3010 ± 0.001	0.1090 ± 0.001	0.0820 ± 0.001	---	---	---	---	---	---	0.6220 ± 0.001	0.6260 ± 0.001	0.2980 ± 0.001	1.0780 ± 0.001	---	---	1.1730 ± 0.001	---	1.7340 ± 0.001	---	2.0840 ± 0.001	---	---
	Campaign 4	2006-04-03	---	0.0960 ± 0.001	---	---	9.3010 ± 0.001	---	0.0810 ± 0.001	---	---	---	---	---	---	---	0.6270 ± 0.001	0.3000 ± 0.001	1.0790 ± 0.001	0.4520 ± 0.001	---	1.1720 ± 0.001	2.1430 ± 0.001	---	0.6540 ± 0.001	---	1.0050 ± 0.001	0.0780 ± 0.001
	Campaign 3	2002-03-04	---	0.0950 ± 0.001	---	---	9.2990 ± 0.001	0.1080 ± 0.001	0.0770 ± 0.001	---	---	---	---	---	---	---	---	0.3010 ± 0.001	1.0810 ± 0.001	0.4540 ± 0.001	0.9730 ± 0.001	1.1700 ± 0.001	---	---	0.6530 ± 0.001	---	1.0050 ± 0.001	---
	Campaign 2	1996-06-30	---	---	---	---	---	---	0.0800	-1.7380	-2.2520	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
	Campaign 1	1993-10-01	---	---	---	---	---	---	---	---	---	9.5410	9.4330 ± 0.001	8.4570 ± 0.001	8.7600 ± 0.001	---	---	---	---	---	---	---	---	---	---	---	---	---
Height difference evolution graph

Download leveling data

TIDE GAUGE LOCAL LEVELING NETWORK DATA OF STATION Brest ----------------------------------------------------------------------------------------------------- Benchmark Lat. Long. Height Year of determination St.dev Distance_to_TG 10chr (°) 14chr (°) 14chr (m) 10chr 22chr (m)10chr (m) 10chr ----------------------------------------------------------------------------------------------------- A ---- ---- 12.500 2024 0.00000 ---- B ---- ---- 12.581 2024 0.00100 ---- C ---- ---- 12.392 2024 0.00100 ---- D ---- ---- 11.426 2024 0.00100 ---- F ---- ---- 11.722 2024 0.00100 ---- G ---- ---- 10.767 2024 0.00100 ---- H ---- ---- 10.250 2024 0.00100 ---- I ---- ---- 11.876 2024 0.00100 ---- J ---- ---- 10.416 2013 0.00100 ---- aIGN ---- ---- 21.733 2024 0.00200 ---- bIGN ---- ---- 21.710 2024 0.00100 ---- cIGN ---- ---- 21.697 2024 0.00200 ---- dIGN ---- ---- 21.792 2024 0.00100 ---- L ---- ---- 11.880 2024 0.00100 ---- N ---- ---- 21.797 2024 0.00100 ---- O ---- ---- 11.904 2024 0.00100 ---- K ---- ---- ---- ---- ---- ----

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Co-located instruments

GPS : Brest (BRST)
Tide Gauge : BREST (BREST)
GPS : Guipavas (GUIP)
GPS : Bourg Blanc (BGBC)