future state plane coordinate systems...20 ppm 0.1 ft/mi 1:50,000 common ldp criterion 40 ppm 0.2...
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STATE OF
COLORADOFuture State Plane
Coordinate Systems
JOEY STONEGNSS COORDINATOR
DENVER WATERGEODETIC COORDINATION
FOR THE STATE OF COLORADO
Future State Plane Coordinate Systems
•Modernization of the National Spatial Reference System• NATRF 2022 (North American Terrestrial Reference Frame of 2022)• Significant Horizontal and Vertical Shifts
•New State Plane Projections • Topographic Base Projection• Emphasis on Minimizing Linear Distortion
• 2 Layers• State Wide Projection• LDPs (Low Distortion Projections)
National Spatial Reference System
Latitude, Longitude Elevation/Height
Ellipsoid
Geoid Model
Horizontal Vertical
Rotation
Origin
Velocity
Level Runs
Gravity
Bench
Marks
3D
Horizontal Datums Vertical Datums
2D
Geographic Coordinates
Projected Coordinates
NAD27 1927-1986NAD83 1986-199xHARN 199X-2007
NSRS2007 2007-20122011 2012-2022
NGVD 29NAVD 88
Ellipsoid Origin
Horizontal NATRF2022 compared to NAD83
Horizontal NATRF2022 compared to NAD83
Vertical NATRF2022 compared to NAD83
Vertical NATRF2022 compared to NAD83
Linear Distortion PPM
PPM δ Distortion in Feet/Mile
Dimensionless Ratio
Comments
20 PPM 0.1 ft/mi 1:50,000 Common LDP Criterion
40 PPM 0.2 ft/mi 1:25,000 Max δ for LDP
50 PPM 0.3 ft/mi 1:20,000 Max δ for NGS Designs
100 PPM 0.5 ft/mi 1:10,000 NAD83 Criterion (@Ellipsoid)
200 PPM 1.1 ft/mi 1:5,000 Common δ under NAD83 @ ground
400 PPM 2.1 ft/mi 1:2,500 Common δ under NAD83 @ ground
1:50,000 and up Commonly Achieved Traverse Closures… (Plus Network Error)
Federal Geographic Data CommitteeGeospatial Positional Accuracy Standards
AEC Surveying and Mapping StandardsClosure Errors
Second-Order, Class I……………..1:50,000Second-Order, Class II..…………..1:20,000Third-Order, Class I….……………...1:10,000Third-Order, Class II…………………..1:5,000
Current Statewide Coordinate System
North Zone
Central Zone
South Zone
Current Statewide Coordinate System
Current Statewide Coordinate System
New Statewide Coordinate System
New Statewide Coordinate System
New Statewide Coordinate System
New LDP Coordinate System
New LDP Coordinate System
New LDP Coordinate System
LinkedIn@ John Hunter, PLS
Colorado NGS Geodetic Coordinator
PLSChttps://www.plsc.net/geodetic_resources.php
Twitter@SPCS22Colorado
NGS Website THANK YOU