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Kitchen Table Kibitzing 9/28/22: D1397, Where Are You? [1]

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Date: 2022-09-28

What’s this?

Having worked for a surveyor, I was curious as to what was stamped on it.

Hello D1397, pleased to meet you

The National Geodetic Survey is a federal agency.

The mission of the National Geodetic Survey (NGS) is to define, maintain and provide access to theNational Spatial Reference System (NSRS) (PDF, 123 KB). The NSRS provides a consistent coordinate system that defines latitude, longitude, height, scale, gravity, and orientation throughout the United States and its territories.

I looked the monument up and found it on their online map.

Yup, that’s where I was

Clicking the datasheet link gives me the full info.

1 National Geodetic Survey, Retrieval Date = SEPTEMBER 27, 2022 JT9448 *********************************************************************** JT9448 DESIGNATION - D 1397 JT9448 PID - JT9448 JT9448 STATE/COUNTY- CA/SONOMA JT9448 COUNTRY - US JT9448 USGS QUAD - SANTA ROSA (2018) JT9448 JT9448 *CURRENT SURVEY CONTROL JT9448 ______________________________________________________________________ JT9448* NAD 83(1986) POSITION- 38 27 35. (N) 122 43 34. (W) SCALED JT9448* NAVD 88 ORTHO HEIGHT - 46.487 (meters) 152.52 (feet) ADJUSTED JT9448 ______________________________________________________________________ JT9448 GEOID HEIGHT - -31.317 (meters) GEOID18 JT9448 DYNAMIC HEIGHT - 46.458 (meters) 152.42 (feet) COMP JT9448 MODELED GRAVITY - 980,011.1 (mgal) NAVD 88 JT9448 JT9448 VERT ORDER - FIRST CLASS II JT9448 JT9448.The horizontal coordinates were scaled from a map and have JT9448.an estimated accuracy of +/- 6 seconds. JT9448. JT9448.The orthometric height was determined by differential leveling and JT9448.adjusted by the NATIONAL GEODETIC SURVEY JT9448.in June 1991. JT9448 JT9448.Significant digits in the geoid height do not necessarily reflect accuracy. JT9448.GEOID18 height accuracy estimate available here. JT9448 JT9448.Click photographs - Photos may exist for this station. JT9448 JT9448.The dynamic height is computed by dividing the NAVD 88 JT9448.geopotential number by the normal gravity value computed on the JT9448.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 JT9448.degrees latitude (g = 980.6199 gals.). JT9448 JT9448.The modeled gravity was interpolated from observed gravity values. JT9448 JT9448; North East Units Estimated Accuracy JT9448;SPC CA 2 - 588,290. 1,936,630. MT (+/- 180 meters Scaled) JT9448 JT9448_U.S. NATIONAL GRID SPATIAL ADDRESS: 10SEH238568(NAD 83) JT9448 JT9448 SUPERSEDED SURVEY CONTROL JT9448 JT9448 NGVD 29 (12/02/92) 45.627 (m) 149.69 (f) ADJUSTED 1 2 JT9448 JT9448.Superseded values are not recommended for survey control. JT9448 JT9448.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. JT9448.See file dsdata.pdf to determine how the superseded data were derived. JT9448 JT9448_MARKER: DV = VERTICAL CONTROL DISK JT9448_SETTING: 38 = SET IN THE ABUTMENT OR PIER OF A LARGE BRIDGE JT9448_SP_SET: ABUTMENT JT9448_STAMPING: D 1397 1987 JT9448_MARK LOGO: NGS JT9448_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL JT9448 JT9448 HISTORY - Date Condition Report By JT9448 HISTORY - 1987 MONUMENTED NGS JT9448 JT9448 STATION DESCRIPTION JT9448 JT9448'DESCRIBED BY NATIONAL GEODETIC SURVEY 1987 JT9448'IN SANTA ROSA. JT9448'IN SANTA ROSA, AT THE INTERSECTION OF U.S. HIGHWAY 101 AND STEEL LANE, JT9448'SET VERTICALLY IN THE SOUTH FACE OF THE NORTH CONCRETE ABUTMENT OF JT9448'THE HIGHWAY OVERPASS OF THE LANE, 5.3 M (17.4 FT) WEST OF THE JT9448'CENTERLINE OF THE SOUTHBOUND LANES OF THE HIGHWAY, 4.9 M (16.1 FT) JT9448'NORTH OF THE CENTERLINE OF THE WESTBOUND LANES OF THE LANE, AND 0.4 M JT9448'(1.3 FT) EAST OF THE WEST END OF THE ABUTMENT. JT9448'THE MARK IS 1.4 M ABOVE A SIDEWALK.

Now I know my place in this world.

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[1] Url: https://www.dailykos.com/stories/2022/9/28/2125178/-Kitchen-Table-Kibitzing-9-28-22-D1397-Where-Are-You

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