Transcript Wisconsin Height Modernization Program (WI-HMP) Colorado Height Modernization Forum

Wisconsin Height Modernization Program
(WI-HMP)
“Improving the Vertical Component of the Geodetic Network”
Colorado Height Modernization Forum
1 December 2006
Paul J. Hartzheim, P.E.
December 2006
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WI-HMP Early Development
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Wisconsin Height Modernization Program (WI-HMP)
was started by WisDOT in 1998 to improve the
vertical component of Geodetic Control in Wisconsin
As part of the growing development of WI-HMP, a
Wide Area Global Positioning System (GPS) RealTime Kinematic Network is being established.
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Height Modernization Objectives
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Eliminate inconsistencies between horizontal and
vertical control data and supplemental control where
marks have been destroyed or are deemed unusable
Utilize GPS technology as a cost effective positioning
tool (achieve 2-cm positional accuracy)
Decrease the cost of surveying required for
transportation related projects
Provide a much more accurate vertical database to a
wide variety of data users throughout the state
Complete initial efforts by 2011
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Example of WI-HMP Benefit
State Agency
WisDOT compared a static GPS survey and
conventional leveling (before WI-HMP) verses a RTK
GPS survey (after WI-HMP) for the establishment of
photogrammetric targets for a highway improvement
project
 Horizontal and Vertical (elevations) positions were all within
2 cm (.07’)
 Static GPS w/Leveling = 280 staff hours
 RTK GPS = 30 staff hours
WI-HMP with RTK provided over a 9:1 time savings!
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Example of WI-HMP Benefit
County Agency
Digital Orthophotography field survey for accuracy
check
 A survey was needed by a County to verify 10 horizontal and
vertical positions derived from digital orthos in one 36 square
mile township
 It was estimated (from past projects) to take 24 hours to
perform these checks using conventional (static GPS, total
station, and leveling) procedures before WI-HMP
 With WI-HMP in place, RTK GPS procedures were utilized to
perform these checks in just 4 hours
WI-HMP with RTK provided 6:1 time savings!
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Funding and Management
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Funding
o State Transportation Funds
o FHWA State Planning & Research Funds
o National Oceanic and Atmospheric Administration (NOAA) Federal Congressional Earmark Funds
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Resource Structure
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DOT Program Manager
Three Geodetic Specialists (all Project positions)
Two Limited Term Employees
Up to 32 consultant staff personnel
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Height Modernization Layout
= HARN station
= Primary Base Network
= Secondary Base Network
= Local Base Network
December 2006
= Existing NGS Level line
= Decimated NGS Level line
= New WI-HMP Level line
Wisconsin Height Modernization Program
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WI-HMP Phases
December 2006
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Status of WI-HMP
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Phases 1, 2, 3, and 4: Fully Completed (Project Data Available
on NGS Web)
Phase 5: Nearly Completed (Monuments w/ Posts Installed;
Survey Complete; GPS Data Available on NGS Web; Awaiting
Publication of Leveling Data by NGS)
Phase 6A: Underway (Monuments w/Posts Installed; Leveling
Completed (Processing Underway); GPS Primary Survey of
Field Observations Completed (Processing Underway);
Secondary and Local GPS Survey of Field Observations
Underway since August 2006; Scheduled Publication in 2007)
Phase 6B: Survey Planned in 2007
Phase 7A: Monuments w/Posts Installed; Descriptions for
Marks Completed; Survey Planned in 2007
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Status of WI-HMP
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Phase 7B: Monuments Installed; Witness Posts
Installation Underway since August 2006
Phase 7C: Reconnaissance Completed
Phase 8: Reconnaissance of Existing Bench Marks
Completed
Statewide Wisconsin Continuous Operating
Reference Network (WI-CORS-NET): Compiling
existing stand alone base stations; developing
planning maps for installation of CORS; researching
other established CORS networks; completed pilot
test project to determine spacing requirement of
CORS and accuracies
December 2006
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WI-HMP Mark Maintenance
GPS Stations: Orange
4”x4” Plastic Guard Posts
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Installed 3 witness posts
around each monument
Established “866” number to
report endangered,
damaged, or destroyed
monuments
Created the “Preservation of
Geodetic Survey Stations
Committee”
December 2006
Wisconsin Height Modernization Program
Bench Marks: White “T”
Plastic Witness Posts
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Benefits of Wide Area RTK Network
(Implementation of Technology Advancement to Height Modernization)
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Eliminates the need and cost for another GPS receiver
which acts as a base
Eliminates the resource time associated with equipment
setup at the base site
Greatly enhances consistency of coordinate determination
Eliminates the need for permanent monumentation on a
local level
Reliability and redundancy is ensured
Hence, WIsconsin Continuously Operating Reference Stations
NETwork (WI-CORS-NET) is Being Implemented
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Concept of Wide Area RTK Network
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Utilizes network RTK solutions to provide high
accuracy GPS positioning over wide areas
At least four GPS reference stations are needed
Users connect into system using wireless connection
Software acknowledges the user’s field position and
allows them to operate as though there is a reference
station next to the rover
Software uses reference stations to calculate virtual
reference station position for the rover
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Development of Pilot Project
for WI-CORS-NET
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Goal is to determine spacing requirement of
permanent GPS base stations while achieving 2-cm
three-dimensional positioning accuracy standard
Pilot network consisted of two permanent sites
(Franklin and Watertown) and two temporary sites
(Germantown and Palmyra)
Equipment utilized on the project included a Trimble
GNSS R8 receiver for the rover and Trimble NetR5
receivers for the bases
Pilot project performed with the cooperation and
assistance from Seiler Instruments
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WI-CORS-NET Pilot Project Configuration
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Construction of Marshfield CORS
(Concrete Pillar)
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Construction of Marshfield CORS
(Concrete Pillar)
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Construction of Marshfield CORS
(Concrete Pillar)
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Construction of Marshfield CORS
(Concrete Pillar)
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Construction of Marshfield CORS
(Concrete Pillar)
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Concrete Pillar Issues
 Remove 1 ½” PVC conduit and place outside monument
 Redesign antenna mount utilizing stainless steel shaft
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Palmyra CORS
(Building Mount)
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Palmyra CORS
(Building Mount)
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Remote Locations of CORS
(Alternative Power and Internet Connections)
USGS Installation - 1999
Hayden Valley instrument
enclosure, solar panels,
communications antenna, and
battery enclosure. Monument is
barely visible in the distance, near
bottom of channel midway
between worker and instrument
enclosure (shoulder level, directly
behind partly buried battery
enclosure).
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Coordinate Determination of Pilot CORS
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Need to have temporary Pilot CORS on same datum
and adjustment as WI-HMP, i.e., NAD 83 (1997.0)
GPS survey was performed to tie HARN and WI-HMP
Primary Base Stations to temporary Pilot CORS sites
Variety of problems with coordinate determination
Using correct datum and adjustment is vital to
accurate testing
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WI-CORS-NET Pilot Project Area
WI-HMP Marks
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Results of Pilot Project Testing
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Utilized Trimble GNSS R8 receiver with Survey
Controller
Majority of area tested utilized Verizon for
communication link, remaining area used Cingular as
communication provider
10 second observations collected at each mark
Results indicate 2 cm accuracy standard in horizontal
and vertical (orthometric height) components are
achievable on a reliable basis
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Sample of Results
Name
2K02
2K02A
2K03
2K03A
2K04
2K04A
2K05
2K05
2K05_GPS
2K05A
2K07
2K07A
2K07B
2K10
2K10a
2K10b
DELAFIELD S GPS
DELAFIELD S GPSA
GENESEE E GPS
GENESEE E GPSa
GENESEE E GPSb
WAUKESHA N GPS
WAUKESHA N Gpa
WAUKESHA N GPb
WAUKESHA N GPc
Northing
Easting
114645.782 726603.264
114310.391 728466.529
114001.158 730057.720
113823.612 732054.195
114810.813 738239.978
115007.446 741791.377
114653.736 733883.160
108698.773 737301.718
113452.214 742984.604
Ortho Hgt RTK-Pub
274.246
274.234
284.416
284.403
286.580
286.565
302.570
302.570
302.577
302.586
303.662
303.654
303.653
273.856
273.841
273.838
308.418
308.422
257.723
257.710
257.712
254.953
254.932
254.917
254.930
Average =
Std Dev =
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Wisconsin Height Modernization Program
-0.012
-0.013
-0.015
0.000
0.007
0.016
-0.008
-0.009
-0.015
-0.018
0.004
-0.013
-0.011
-0.021
-0.036
-0.023
-0.010
0.013
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Development of WI-CORS-NET
(Funding)
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Received approval on extension and budget revision
for FFY05 NOAA Earmark Grant
Approximately $300,000 would be allocated towards
funding the establishment of nearly 24 WI-CORSNET sites
Grant expires on 31 May 2007
Plan is to revise FFY06 NOAA Earmark Grant to
allow funding for completion of initial installation and
more in later 2007
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Development of WI-CORS-NET
(Technical)
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Initial plan is to establish 25 permanent CORS throughout the
eastern half of Wisconsin
Permanent sites would have concrete pillar design
Plan is to incorporate existing single base station receivers
through possible upgrade replacement
Reconnaissance already underway for location of monuments
GPS hardware and software would be acquired through bid
process
Determination needs to be made on distribution of licenses
Determination needs to be made on the availability of
communication services for transmitting data
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WI-CORS-NET
Phase 1 Preliminary Design
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WI-CORS-NET
Phase 1 Preliminary Design
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WI-CORS-NET
Phase 1 Preliminary Design
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Development of WI-CORS-NET
(Management)
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Coordination and management on the development
and implementation of WI-CORS-NET by WisDOT
Assistance being solicited from the stakeholders (our
Regions, public entities, and consultants)
Master information list containing POCs, current
CORS sites, etc. compiled and updated frequently
Development of WI-CORS-NET status report is ongoing
Cooperative agreement finalized, to be distributed to
Partners
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Tentative Implementation Timeline
Activity
October
Monthly Timeline (2006 – 2007)
November December January February
March
April
May
Reconnaissance
Monumentation
Equipment Identification
Purchasing Process
Installation
Testing
Operational
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Questions/Comments?
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