MRC 13 — NGS DF7916 — Madison, US
USNGStrigunknown#6884
Latitude
38.660189°
Longitude
-90.147189°
Ellipsoidal h
97.50 m
Ortho h
128.70 m
Verifications
0
Last checked
Never
This triangulation station is part of the National Geodetic Survey's network that provides the fundamental control framework for mapping and surveying throughout the United States. Located near Madison, Illinois, at coordinates 38.66019° N, 90.14719° W, this trig point serves as a precise reference for horizontal and vertical control.
Triangulation stations of this type were historically established to create accurate geodetic networks through intervisible sight lines. The documented ellipsoidal elevation of 97.5 meters contributes to the vertical datum information. Such control points remain valuable for verifying GPS observations, conducting professional surveys, and maintaining spatial data consistency. Proper documentation and verification of these marks ensures their continued utility for engineering projects, mapping initiatives, and surveying operations requiring high positional accuracy.
Verify this point
Sign in to submit a verification from the field.
Verification history (0)
No verifications yet. Be the first to check this point!