Floodplain RM No.:
Stream Number:
Reference Mark Status
Date:
Condition:
County: Model.County State: Texas
Key Map No.:
Established By:
Date Established:
NGS Classification(1):
Watershed:
RM's Directly Tied:
Units of Measure:
Survey Method Horz:
Survey Method Vert:
Horizontal Datum:
Horizontal Adj.(2):
Projection Zone:
Vertical Datum:
Vertical Adj.(3):
Geoid Model Used:
Station Name:
Contractor PID:
Marker:
Rod Depth:
Stamping:
Sleeve Depth:
Mark Logo:
Geoid Height:
Latitude:
Northing:
Longitude:
Easting:
Ellipsoid Height:
Elevation:
Convergence:
Scale Factor:
Satellite Observable:
Elevation Factor:
NGS PID (if applic):
Combined Factor:
Notes:
  1. This is NGS' new classification system. Range VI indicates that this position meets the 0.02m-0.05m Accuracy Standard for Horizontal Position, Ellipsoidal Height, and Orthometric Height (elevation) at the 95% confidence level (m=meters).
  2. Horizontal Adjustment - This survey is constrained to the NGS Published Horizontal positions of the geodetic stations adjusted by NGS in 2001.
  3. Vertical Adjustment - This survey is constrained to the NGS Published Elevation for Northeast 2250 CORS ARP adjusted by NGS in 2001 and as published in PID AJ6430. Epoch Date 1997.00.
  4. The elevation shown equals the Ellipsoid Height minus Geoid Height (from GEOID99) plus a constant of 0.253 feet.
  5. The elevation is established by differential leveling techniques, utilizing the published elevations from nearby Reference Marks.
Station Recovery Data:
HARRIS COUNTY FLOODPLAIN REFERENCE MARKS
Floodplain RM Number:
Stream Number:
Northing: Easting: Elevation:
Location:
To Reach Description
Photo 1-Station Detail:
Photo 2-Station Area Picture: