Brazos County Benchmark System Benchmark = BN61

Location: University Drive

BM Owner: City of Bryan

For best results contact City of Bryan.

Horz. Datum NAD 83 (1993) Vert. Datum NAVD 88

Latitude Longitude

Position 30 38 18.54525(N) 96 18 46.96475(W) Adjusted GPS

Orthometric Height (M) 85.932 unchecked GPS

Ellip_Height (M) 59.53 GPS

PROJECTION COORDINATES

NORTH EAST SCALE CONVERG.

SPC TX C 3,114,693.89 1,085,273.65 0.99990168 + 02 04 14.5

UTM 14 3,392,616.78 757,521.22 1.00041817 + 01 22 12.3

All adjustments hereafter, Original Horizontal Coordinates: NAD 83 Geographic

Universal Transverse Mercator Projection,

NAD 83, NAVD 88, Meters

UTM Zone 14

Input Vertical Coordinates: Ellipsoid Height, GRS 80, Meters

Output Vertical Coordinates: Orthometric Height, NAVD88, Meters

Elevation 85.963

Convergence 01 22 12.28419

Scale Factor 1.000418174

Combined Factor 1.000404678

State Plane Coordinates. NAD 83, NAVD 88

Texas Central Zone (4203) Meters

Input Vertical Coordinates: Ellipsoid Height, GRS 80, Meters

Output Vertical Coordinates: Orthometric Height, NAVD 88, Meter

Elevation 85.963

Convergence 02 04 14.46579

Scale Factor 0.999901676

Combined Factor 0.999888187

NAD83 and NAVD88, GEOID96 model, GRS80 ellisoid

Input Vertical Coordinates: Ellipsoid Height, GRS 80, Meters

Output Vertical Coordinates: Orthometric Height, NAVD 88, Meters

NAD83 (1993) NAVD88

Elevation (m) 85.963

NAD27, NGVD29, Mean Sea Level, Clark 1866 Ellipsoid

Input Vertical Coordinates: Ellipsoid Height GRS 80, Meters

Output Vertical Coordinates: MLS, NGVD 29, U.S. Survey Feet

Elevation 281.94

Datum Shift (m) Delta Lat. = 22.030