Where We Are

1
Dr. Dru Smith, NGS Chief Geodesist Ross Mackay,
Kentucky Geodetic Advisor
Where We Are and the Future of NGS
in Kentucky
2008 KAPS Conference Lexington February 14, 2008
2

• NAD83 (NSRS2007) Adjustment
• Kentucky Geodetic Control
• Web Map Service
• KY-CORS
• Height Mod Leveling
• Height Mod Gravity
• County Scorecard
• but first

3
NAD83 (NSRS2007) Adjustment
4
NSRS 2007 Adjustment

• Only GPS adjusted.
• CORS stations served as control

• 962 marks in KY adjustment block
• plus 50 ties to neighbor states
• average horizontal shift 0.8 cm
• average vertical shift 2.0 cm

5
NSRS 2007 Adjustment
6
NSRS 2007 Adjustment
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NSRS 2007 Adjustment
8
NSRS 2007 Adjustment
9
NAD83 (NSRS2007) Adjustment, Vertical
10
NSRS 2007 Adjustment
11
NSRS 2007 Adjustment
12
NSRS 2007 Adjustment
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NSRS 2007 Adjustment
14
NSRS 2007 Adjustment

• Provide local and network accuracy defined by
  95 confidence level estimates for each point, as
  recommended by the Federal Geographic Data
  Committee's (FGDC) Geospatial Positioning
  Accuracy Standards for Geodetic Networks.

Accuracy Reporting FGDC-STD-007.2-1998 When
providing geodetic point coordinate data, a
statement should be provided that the data meets
a particular accuracy standard for both the local
accuracy and the network accuracy. For example,
these geodetic control data meet the 2-centimeter
local accuracy standard for the horizontal
coordinate values and the 5-centimeter local
accuracy standard for the vertical coordinate
values (heights) at the 95-percent confidence
level. A similar statement should be provided for
these same data reporting the network accuracy.
Cartoon by Matt Groening
15
GZ1195 CURRENT SURVEY
CONTROL GZ1195 _________________________________
__________________________________ GZ1195 NAD
83(2007)- 37 33 10.84479(N) 084 38
38.53174(W) ADJUSTED GZ1195 NAVD 88 -
298.980 (meters) 980.90 (feet)
ADJUSTED GZ1195 ______________________________
_____________________________________ GZ1195
EPOCH DATE - 2002.00 GZ1195 X
- 472,599.208 (meters)
COMP GZ1195 Y - -5,040,927.233
(meters) COMP GZ1195 Z
- 3,866,393.003 (meters)
COMP GZ1195 LAPLACE CORR- 3.65
(seconds) DEFLEC99 GZ1195
ELLIP HEIGHT- 266.930 (meters)
(02/10/07) ADJUSTED GZ1195 GEOID HEIGHT-
-32.02 (meters) GEOID03
GZ1195 DYNAMIC HT - 298.750 (meters)
980.15 (feet) COMP GZ1195 GZ1195 -------
Accuracy Estimates (at 95 Confidence Level in
cm) -------- GZ1195 Type PID Designation
North East Ellip GZ1195
--------------------------------------------------
----------------- GZ1195 NETWORK GZ1195
STANFORD 0.45 0.41
1.00 GZ1195 ------------------------------------
------------------------------- GZ1195
SUPERSEDED SURVEY CONTROL
GZ1195 GZ1195 ELLIP H (11/03/04) 266.930 (m)
GP( ) 3 1 GZ1195 NAD
83(1993)- 37 33 10.84499(N) 084 38
38.53159(W) AD( ) B GZ1195 ELLIP H
(09/07/94) 266.943 (m)
GP( ) 4 1 GZ1195 NAD 83(1986)- 37 33
10.85218(N) 084 38 38.53888(W) AD( ) 1
GZ1195 NAD 27 - 37 33 10.57300(N) 084
38 38.74800(W) AD( ) 1 GZ1195 NAVD 88
(09/07/94) 298.98 (m) 980.9 (f)
LEVELING 3 GZ1195 NGVD 29 (??/??/92)
299.132 (m) 981.40 (f) ADJ UNCH 2
0
NSRS 2007 Adjustment
Date JANUARY 31, 2008 GZ1195

GZ1195 CBN -
This is a Cooperative Base Network Control
Station. GZ1195 DESIGNATION - STANFORD GZ1195
PID - GZ1195 GZ1195 STATE/COUNTY-
KY/LINCOLN GZ1195 USGS QUAD - STANFORD
(1979) GZ1195 GZ1195
CURRENT SURVEY CONTROL GZ1195
__________________________________________________
_________________ GZ1195 NAD 83(2007)- 37 33
10.84479(N) 084 38 38.53174(W) ADJUSTED
GZ1195 NAVD 88 - 298.980 (meters)
980.90 (feet) ADJUSTED GZ1195
__________________________________________________
_________________ GZ1195 EPOCH DATE -
2002.00 GZ1195 X - 472,599.208
(meters) COMP GZ1195 Y
- -5,040,927.233 (meters)
COMP GZ1195 Z - 3,866,393.003
(meters) COMP GZ1195
LAPLACE CORR- 3.65 (seconds)
DEFLEC99 GZ1195 ELLIP HEIGHT-
266.930 (meters) (02/10/07) ADJUSTED
GZ1195 GEOID HEIGHT- -32.02 (meters)
GEOID03 GZ1195 DYNAMIC HT -
298.750 (meters) 980.15 (feet) COMP
GZ1195 GZ1195 ------- Accuracy Estimates (at
95 Confidence Level in cm) -------- GZ1195
Type PID Designation
North East Ellip GZ1195 ---------------------
----------------------------------------------
GZ1195 NETWORK GZ1195 STANFORD
0.45 0.41 1.00 GZ1195
--------------------------------------------------
----------------- GZ1195 MODELED GRAV-
979,852.7 (mgal) NAVD 88
GZ1195 GZ1195 VERT ORDER - SECOND CLASS 0
GZ1195 GZ1195.The horizontal coordinates were
established by GPS observations GZ1195.and
adjusted by the National Geodetic Survey in
February 2007. GZ1195 GZ1195.The datum tag of
NAD 83(2007) is equivalent to NAD 83(NSRS2007).
GZ1195.See National Readjustment for more
information. GZ1195.The horizontal coordinates
are valid at the epoch date displayed above.
GZ1195.The epoch date for horizontal control is a
decimal equivalence GZ1195.of Year/Month/Day.
GZ1195 GZ1195.The orthometric height was
determined by differential leveling GZ1195.and
adjusted in June 1991. GZ1195 GZ1195.The X, Y,
and Z were computed from the position and the
ellipsoidal ht. GZ1195 GZ1195.The Laplace
correction was computed from DEFLEC99 derived
deflections. GZ1195 GZ1195.The ellipsoidal
height was determined by GPS observations
GZ1195.and is referenced to NAD 83. GZ1195
GZ1195.The geoid height was determined by
GEOID03. GZ1195 GZ1195.The dynamic height is
computed by dividing the NAVD 88
GZ1195.geopotential number by the normal gravity
value computed on the GZ1195.Geodetic Reference
System of 1980 (GRS 80) ellipsoid at 45
GZ1195.degrees latitude (g 980.6199 gals.).
GZ1195 GZ1195.The modeled gravity was
interpolated from observed gravity values.
GZ1195 GZ1195 North
East Units Scale Factor Converg. GZ1195SPC
KY1Z - 1,135,942.308 1,597,716.097 MT
0.99992078 0 40 44.5 GZ1195SPC KY1Z -
3,726,837.39 5,241,840.23 sFT 0.99992078 0
40 44.5 GZ1195SPC KY S - 635,926.076
597,719.269 MT 0.99995267 0 40 14.6
GZ1195SPC KY S - 2,086,367.47 1,961,017.30
sFT 0.99995267 0 40 14.6 GZ1195UTM 16
- 4,158,831.395 708,111.688 MT 1.00013351
1 26 11.3 GZ1195 GZ1195! - Elev
Factor x Scale Factor Combined Factor
GZ1195!SPC KY1Z - 0.99995811 x
0.99992078 0.99987890 GZ1195!SPC KY S -
0.99995811 x 0.99995267 0.99991079
GZ1195!UTM 16 - 0.99995811 x
1.00013351 1.00009162 GZ1195 GZ1195
Primary Azimuth Mark
Grid Az GZ1195SPC KY1Z - LANCASTER
MUNICIPAL TANK 036 50 51.6
GZ1195SPC KY S - LANCASTER MUNICIPAL TANK
036 51 21.5 GZ1195UTM 16 -
LANCASTER MUNICIPAL TANK 036 05
24.8 GZ1195 GZ1195-----------------------------
----------------------------------------
GZ1195 PID Reference Object
Distance Geod. Az GZ1195

dddmmss.s GZ1195 GZ3013 LANCASTER MUNICIPAL
TANK APPROX. 9.4 KM 0373136.1
GZ1195 GZ3012 LANCASTER GARRARD CO CTHSE
APPROX. 9.3 KM 0380439.7 GZ1195 GZ1197
STANFORD AZ MK
0864039.0 GZ1195 GZ1196 STANFORD RM 1
29.797 METERS 11243
GZ1195 GZ0861 TIP TOP RESET
APPROX.10.0 KM 1730345.6 GZ1195 GZ1194
STANFORD RM 2 21.010
METERS 21115 GZ1195-----------------------
----------------------------------------------
GZ1195 GZ1195
SUPERSEDED SURVEY CONTROL GZ1195 GZ1195 ELLIP
H (11/03/04) 266.930 (m)
GP( ) 3 1 GZ1195 NAD 83(1993)- 37 33
10.84499(N) 084 38 38.53159(W) AD( ) B
GZ1195 ELLIP H (09/07/94) 266.943 (m)
GP( ) 4 1 GZ1195 NAD
83(1986)- 37 33 10.85218(N) 084 38
38.53888(W) AD( ) 1 GZ1195 NAD 27 -
37 33 10.57300(N) 084 38 38.74800(W) AD(
) 1 GZ1195 NAVD 88 (09/07/94) 298.98 (m)
980.9 (f) LEVELING 3 GZ1195 NGVD
29 (??/??/92) 299.132 (m) 981.40 (f)
ADJ UNCH 2 0 GZ1195 GZ1195.Superseded values
are not recommended for survey control.
GZ1195.NGS no longer adjusts projects to the NAD
27 or NGVD 29 datums. GZ1195.See file dsdata.txt
to determine how the superseded data were
derived. GZ1195 GZ1195_U.S. NATIONAL GRID
SPATIAL ADDRESS 16SGG0811258831(NAD 83)
GZ1195_MARKER DS TRIANGULATION STATION DISK
GZ1195_SETTING 7 SET IN TOP OF CONCRETE
MONUMENT GZ1195_SP_SET CONCRETE POST
GZ1195_STAMPING STANFORD 1935 GZ1195_MARK LOGO
CGS GZ1195_MAGNETIC N NO MAGNETIC
MATERIAL GZ1195_STABILITY C MAY HOLD, BUT OF
TYPE COMMONLY SUBJECT TO GZ1195STABILITY
SURFACE MOTION GZ1195_SATELLITE THE SITE
LOCATION WAS REPORTED AS SUITABLE FOR
GZ1195SATELLITE SATELLITE OBSERVATIONS -
December 03, 2002 GZ1195 GZ1195 HISTORY -
Date Condition Report By GZ1195
HISTORY - 1935 MONUMENTED CGS
GZ1195 HISTORY - 1938 GOOD
KYHD GZ1195 HISTORY - 1950 GOOD
CGS GZ1195 HISTORY - 1958 GOOD
NGS GZ1195 HISTORY - 1963 GOOD
CGS GZ1195 HISTORY - 19930929
GOOD NGS GZ1195 HISTORY -
19951018 GOOD LOWE GZ1195 HISTORY
- 20010914 GOOD KYDT GZ1195
HISTORY - 20021203 GOOD WOOLPT
GZ1195 GZ1195 STATION
DESCRIPTION GZ1195 GZ1195'DESCRIBED BY COAST
AND GEODETIC SURVEY 1935 (MAH) GZ1195'STATION IS
ON THE S SLOPE OF A BARE HILL ON THE RIGHT-OF-WAY
OF U.S. GZ1195'HIGHWAY 27, 2 MILES NNE OF
STANFORD, AND 9-3/4 MILES SE OF GZ1195'DANVILLE.
IT IS 7 FEET ESE OF FENCE, 24 FEET WNW OF CENTER
LINE OF GZ1195'U.S. HIGHWAY 27, AND ABOUT 75
PACES NW OF NEGRO CABIN, AND 200 YARDS GZ1195'SW
OF J.R. MC BEES FARMHOUSE. GZ1195'
GZ1195'SURFACE, UNDERGROUND, REFERENCE AND
AZIMUTH MARKS ARE STANDARD BRONZE GZ1195'DISKS
SET IN CONCRETE. GZ1195' GZ1195'REFERENCE MARK
NO. 1 IS E OF STATION, 10 PACES ENE OF CENTER
LINE OF GZ1195'ROAD, AND 18 INCHES WNW OF FENCE
LINE. GZ1195' GZ1195'REFERENCE MARK NO. 2 IS S
OF STATION, 10 PACES ENE OF CENTER LINE OF
GZ1195'ROAD, AND 18 INCHES WNW OF FENCE LINE.
GZ1195' GZ1195'AZIMUTH MARK IS E OF STATION, 18
INCHES NW OF FENCE LINE, 10 PACES GZ1195'SSE OF
CENTER LINE OF U.S. HIGHWAY 27, AND 12 PACES SW
OF TELEPHONE GZ1195'POLE. GZ1195' GZ1195'TO
REACH FROM THE COURTHOUSE IN STANFORD, GO N ON
U.S. HIGHWAY 27, GZ1195'FOR 1.7 MILES TO GRAVEL
ROAD TO LEFT, KEEP STRAIGHT AHEAD FOR 0.4
GZ1195'MILE TO STATION SITE ON LEFT, JUST PAST
SMALL HOUSE ON RIGHT. GZ1195' GZ1195'A 64-FOOT
TOWER REQUIRED. GZ1195 GZ1195
STATION RECOVERY (1938) GZ1195
GZ1195'RECOVERY NOTE BY KENTUCKY HIGHWAY
DEPARTMENT 1938 GZ1195'STATION, REFERENCE AND
AZIMUTH MARKS, WERE RECOVERED AS DESCRIBED, IN
GZ1195'GOOD CONDITION. GZ1195 GZ1195
STATION RECOVERY (1950) GZ1195
GZ1195'RECOVERY NOTE BY COAST AND GEODETIC SURVEY
1950 (JAW) GZ1195'THE STATION, REFERENCE MARK
NO. 1, REFERENCE MARK NO. 2, AND AZIMUTH
GZ1195'MARK WERE RECOVERED AND FOUND TO BE IN
GOOD CONDITION. GZ1195' GZ1195'THE ORIGINAL
DESCRIPTION IS ADEQUATE. GZ1195 GZ1195
STATION RECOVERY (1958) GZ1195
GZ1195'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY
1958 GZ1195'2.1 MI N FROM STANFORD. GZ1195'0.9
MILE NORTH ALONG U.S. HIGHWAY 27 FROM THE COURT
HOUSE AT GZ1195'STANFORD, THENCE 0.8 MILE
NORTHWEST ALONG STATE HIGHWAY 590, GZ1195'THENCE
0.4 MILE NORTHEAST ALONG A BLACK TOP ROAD (OLD
U.S. GZ1195'HIGHWAY 27), ABOUT 200 YARDS
SOUTHWEST OF THE J.R. MC BEE FARM GZ1195'HOUSE,
ABOUT 75 YARDS NORTHWEST OF A SMALL ABANDONED
HOUSE, ON GZ1195'THE SOUTH SLOPE OF A BARE HILL,
24 FEET NORTHWEST OF THE CENTER OF GZ1195'ROAD,
98 FEET WEST OF REFERENCE MARK NO. 1, 69 FEET
NORTH OF GZ1195'REFERENCE MARK NO. 2, ABOUT 4
FEET ABOVE THE LEVEL OF ROAD, AND GZ1195'7 FEET
SOUTHEAST OF THE FENCE LINE. STATION DISK IN
CONCRETE GZ1195'POST, PROJECTING 1 INCH.
GZ1195 GZ1195 STATION
RECOVERY (1963) GZ1195 GZ1195'RECOVERY NOTE BY
COAST AND GEODETIC SURVEY 1963 (WAZ) GZ1195'THE
STATION MARK, REFERENCE MARK NO. 1 AND REFERENCE
MARK NO. 2 WERE GZ1195'RECOVERED AND FOUND IN
EXCELLENT CONDITION. THE AZIMUTH MARK WAS
GZ1195'FOUND LAYING ON ITS SIDE AND JUST UNDER
THE SURFACE OF A CULTIVATED GZ1195'FIELD VERY
NEAR ITS ORIGINAL LOCATION. THE MARK WAS
COMPLETELY GZ1195'DESTROYED AND THE DISK REMOVED
FOR SUBMISSION TO THE WASHINGTON GZ1195'OFFICE.
DUE TO CHANGES IN THE HIGHWAYS AND THE AREA
AROUND THE GZ1195'STATION SITE, THE ORIGINAL TO
REACH AND STATION DESCRIPTION ARE NO
GZ1195'LONGER ADEQUATE. FOLLOWING IS A NEW AND
COMPLETE DESCRIPTION. GZ1195' GZ1195'THE
STATION IS ALONG THE RIGHT-OF-WAY OF OLD U.S.
HIGHWAY 27 ABOUT GZ1195'9.75 MILES SOUTHEAST OF
DANVILLE AND 2 MILES NORTH- NORTHEAST OF
GZ1195'STANFORD. GZ1195' GZ1195'TO REACH FROM
THE SOUTHEAST CORNER OF THE LINCOLN COUNTY
COURTHOUSE GZ1195'SQUARE IN STANFORD, GO EAST ON
EAST MAIN STREET FOR 0.45 MILE TO THE
GZ1195'JUNCTION OF U.S. HIGHWAY 27 AND STATE
ROUTE 150. HERE TURN SHARP LEFT GZ1195'AND GO
NORTHERLY ON U.S. HIGHWAY 27 AND STATE ROUTE 150
FOR 0.65 GZ1195'MILE TO WHERE STATE ROUTE 150
BEARS LEFT, U.S. HIGHWAY 27 GOES GZ1195'STRAIGHT
AHEAD AND AN OILED ROAD ANGLES OFF TO THE LEFT
BETWEEN GZ1195'THE TWO HIGHWAYS. HERE KEEP RIGHT
AND CONTINUE NORTHERLY ON U.S. GZ1195'HIGHWAY 27
FOR 0.15 MILE TO THE JUNCTION OF STATE ROUTE 590,
TURN GZ1195'SHARP LEFT FOR ABOUT 200 FEET, THEN
BACK RIGHT AND GO NORTHERLY ON GZ1195'STATE
ROUTE 590 FOR 0.5 MILE TO WHERE STATE ROUTE 590
TURNS SHARP GZ1195'LEFT. HERE CONTINUE STRAIGHT
AHEAD NORTHWEST ON A MACADAM ROAD (OLD
GZ1195'U.S. HIGHWAY 27) FOR 0.4 MILE TO THE
STATION ON THE LEFT JUST AFTER GZ1195'PASSING AN
OLD ABANDONED HOUSE AND A DOUBLE METAL GATE
LEADING INTO A GZ1195'SHELL OIL COMPANY BULK
STATION ON THE RIGHT. GZ1195' GZ1195'THE
STATION IS 41 FEET WEST-SOUTHWEST OF AN 8-INCH
CEDAR TREE, 32 GZ1195'FEET EAST-SOUTHEAST OF A
10-INCH LOCUST TREE, 21 FEET NORTH OF THE
GZ1195'APPROXIMATE CENTER OF THE MACADAM ROAD, 7
FEET SOUTH OF A WOVEN WIRE GZ1195'FENCE, 0.9 OF
A FOOT SOUTH OF A METAL WITNESS POST AND SIGN,
AND ON GZ1195'A SLOPING BANK ABOUT 3 FEET ABOVE
THE LEVEL OF THE ROAD. IT IS A GZ1195'STANDARD
DISK SET IN THE TOP OF A 12-INCH SQUARE, CONCRETE
MONUMENT GZ1195'THAT PROJECTS 1 INCH AND THE
DISK IS STAMPED STANFORD 1935 981.402. GZ1195'
GZ1195'REFERENCE MARK NO. 1 IS ACROSS THE MACADAM
ROAD FROM THE STATION, 28 GZ1195'FEET SOUTH OF
THE APPROXIMATE CENTER OF THE MACADAM ROAD AND
GZ1195'1 FOOT NORTH OF A WOVEN WIRE FENCE. IT IS
A STANDARD DISK SET IN THE GZ1195'TIP OF A
12-INCH SQUARE, CONCRETE MONUMENT THAT PROJECTS 2
INCHES GZ1195'AND THE DISK IS STAMPED STANFORD
NO 1 1935 975.464. GZ1195' GZ1195'REFERENCE
MARK NO. 2 IS ACROSS THE MACADAM ROAD FROM THE
STATION, 64 GZ1195'FEET EAST OF THE CENTER OF
THE GATE LEADING INTO THE BULK OIL
GZ1195'STATION. 30 FEET SOUTH OF THE APPROXIMATE
CENTER OF THE MACADAM ROAD, GZ1195'12 FEET EAST
OF A 12-INCH LOCUST TREE, AND 5 FEET NORTH OF A
GZ1195'WOVEN WIRE FENCE. IT IS A STANDARD DISK
SET IN THE TOP OF A 12-INCH GZ1195'SQUARE,
CONCRETE MONUMENT THAT PROJECTS 1 INCH AND THE
DISK GZ1195'IS STAMPED STANFORD NO 2 1935
980.241. GZ1195 GZ1195
STATION RECOVERY (1993) GZ1195 GZ1195'RECOVERY
NOTE BY NATIONAL GEODETIC SURVEY 1993 GZ1195'THE
STATION IS LOCATED ABOUT 2 MI (3.2 KM) NORTH OF
STANFORD AND 10 MI GZ1195'(16.1 KM) SOUTHEAST OF
DANVILLE ON THE SOUTH SLOPE OF A FENCED
GZ1195'PASTURE. OWNERSHIP--TOM OWENS (606)
365-1200, 236-7400 (BUSINESS). GZ1195'TO REACH
THE STATION FROM THE JUNCTION OF U.S. HIGHWAYS 27
AND 150 GZ1195'BYPASS IN NORTHEAST STANFORD, GO
NORTH ON HIGHWAY 27 FOR 0.1 MI GZ1195'(0.2 KM)
TO STATE ROUTE 590 ON THE LEFT, CONTINUE
NORTHEAST ON GZ1195'HIGHWAY 27 FOR 0.9 MI (1.4
KM) TO RADIO STATION WRSL AND A PAVED ROAD
GZ1195'ON THE LEFT, TURN LEFT AND GO NORTH ON
PAVED ROAD FOR 0.05 MI GZ1195'(0.08 KM) TO A
T-JUNCTION, TURN LEFT AND GO WEST ON PAVED ROAD
FOR GZ1195'0.2 MI (0.3 KM) TO THE TOP OF A HILL
AND THE STATION ON THE RIGHT. GZ1195'NOTE--ALMOST
HALF OF ONE SIDE OF THE CONCRETE MONUMENT IS
BROKEN OFF, GZ1195'BUT THE DISK AND MONUMENT IS
STABLE. GZ1195'STATION IS PROJECTING 1 CM.
LOCATED 6.7 M (22.0 FT) NORTH FROM AND 1
GZ1195'M (3.3 FT) ABOVE THE CENTERLINE OF THE
PAVED ROAD, 32.7 M (107.3 FT) GZ1195'NORTHEAST
FROM UTILITY POLE SPSK630, AND 1.9 M (6.2 FT)
NORTH OF A GZ1195'WITNESS POST IN A WHITE WOODEN
FENCELINE. GZ1195 GZ1195
STATION RECOVERY (1995) GZ1195
GZ1195'RECOVERY NOTE BY LOWE ENGINEERS 1995
(GRP) GZ1195'RECOVERED AS DESCRIBED. GZ1195
GZ1195 STATION RECOVERY
(2001) GZ1195 GZ1195'RECOVERY NOTE BY KENTUCKY
DEPARTMENT OF TRANSPORTATION 2001 (RL)
GZ1195'RECOVERED IN GOOD CONDITION. GZ1195
GZ1195 STATION RECOVERY
(2002) GZ1195 GZ1195'RECOVERY NOTE BY WOOLPERT
CONSULTANTS 2002 (CSM) GZ1195'RECOVERED AS
DESCRIBED WITH THESE ADDITIONS. GZ1195'
GZ1195''PAVED ROAD' REFERENCED IN TO-REACH
DESCRIPTION NOW KNOWN AS RIDGEWAY GZ1195'ROAD.
GZ1195' GZ1195'TO REACH THE STATION FROM THE
INTERSECTION OF US 27 AND US 150 IN
GZ1195'STANFORD, TRAVEL ON US 27 N FOR 1.1
MILES, TURN LEFT ONTO RIDGWAY GZ1195'ROAD,
TRAVEL 60 M TO STOP SIGN AT T-INTERSECTION, TURN
LEFT AND GZ1195'CONTINUE ON RIDGEWAY RD FOR 0.25
MILE TO STATION ON THE RIGHT.
16
NSRS 2007 Adjustment
NGS Policy for the NAD83 Readjustment October 28,
1998 Following the completion of the
readjustment, a national transformation model
will be developed. NGS may consider a solution
that is different than the current NADCON format
(e.g., a 7-parameter transformation). Publication
of transformed NAD 83 (NSRS) coordinates for
older stations determined by "classical" non-GPS
survey methods are still being considered. A
final decision will be made after having
additional discussions with spatial data users.

• The Products and Services Committee of NGS
  voted to rescind the 1998 policy which stated
  that a transformation would be provided between
  older versions of NAD 83 and NAD 83(NSRS2007).
  Initial tests indicated that the shifts were too
  small, the accuracy of the shifts too large, and
  sparseness of the data too great to produce a
  useful transformation.
•  
• Users who wish to transform existing surveys
  from an older version of NAD 83 into NAD
  83(NSRS2007) are urged to recompute coordinates
  using original observations and newly published
  NAD 83(NSRS2007) coordinates.

17
NSRS 2007 Adjustment
18
Kentucky Geodetic Control Web Map Service
19
KY Geodetic Web Map Service
20
KY Geodetic Web Map Service
21
KY Geodetic Web Map Service
Zoom in Identify Rectangle Selection
Point Locator (DD,DMS, SP, ,UTM, Carter)
Find XY Bookmark Get Datasheet KGS
GeoPortal Help
22
KY Geodetic Web Map Service
23
Kentucky CORS
24
KY Height Modernization

• Morehead, KYMH
• Cumberland, KYCB
• Somerset, KYSC
• Campbellsville, KYCB
• Boone County, KYBO
• Ashland, KYAS
• Taylor Lake, LOU5

25
KY Height Modernization
26
KY Height Modernization
27
KY Height Modernization

• Morehead, KYMH
• Cumberland, KYCB
• Somerset, KYSC
• Campbellsville, KYCB
• Taylor Lake, Lou5
• Ashland, KYAS

• Madisonville , KYTB
• Bowling Green, KYTC
• Elizabethtown, KYTD
• Louisville, KYTE
• Covington, KYTF
• Lexington, KYTG
• Somerset, KYTH
• Flemingsburg, KYTI
• Manchester, KYTK
• Pikeville, KYTL

• Greenbo Lake SRP, KYGB
• Dale Hollow SRP, KYDH
• Rough River SRP, KYRR

• Paducah, KYTA
• Jackson, KYTJ

28
CORS Applications
29
OPUS
CORS Applications

• Submit GPS data file to NGS website
• Processed automatically with NGS computers
  software
• With respect to 3 suitable CORS
• Solution via email (usually in minutes)
• Fast, easy consistent access to the
• National Spatial Reference System

30
CORS Applications

• Single Baseline RTK
• NTRIP protocol
• Streaming data
• Usually 5 second
• Wireless internet connection
• Cell phone with data package

• URL is http//159.19.10.282101
• Unrestricted access
• No user name/password
• Contact
• Danielle,Buchanan_at_ky.gov
• [phone] x3420

• Real Time Network
• Being researched this year
• Probable fee

31
CORS Applications
32
CORS Applications
Slide by Jim Waters, TNDOT
Graphics Courtesy of Caterpiller Inc.
33
Height Mod Leveling
34
KY Height Modernization
H Elevation (Orthometric Height)
h Ellipsoidal Height (from GPS)
N Geoid Height (from Geoid model)

Topographic Surface
H
h
N
N
Geoid
Ellipsoid
h - N
H
h
35
Kentucky Height Mod Whats next?
H h - N
36
KY Height Modernization
37
Single-Piece, Bar-Coded Invar, Calibrated Rod
with Brace Poles
38
KY Height Modernization
39
Orthometric Correction

• Co-2hasin2?1(a2ß/a)cos2?d?
• h average height of section
• a 0.002644 ß 0.000007
• ? average latitude of the section
• d? latitude difference between the beginning
  and end points of the section
• Correction not needed when geopotential numbers
  are used!

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Height Mod Gravity
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KY Height Modernization
equipotential gravity field
The geoid can be as low as 106 meters (350 feet)
below the ellipsoid or as high as 85 meters (280
feet) above.
NASAs GRACE Gravity Recovery and Climate
Experiment
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Absolute gravimeterExample Micro-g Solutions
FG5
KY Height Modernization

• Ballistic (free-fall) of retro- reflector in
  vacuum chamber, tracked by laser beam
• Instrument accuracy and precision 1.1 mGals
• Used for temporal change of g

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County Scorecard
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NGS County Scorecard
NOAA has a new performance metric that assesses
how well we are doing at enabling local
capacity for accurate positioning.
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NGS County Scorecard
r county
added to this map.
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Kentucky GeoPortal
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Ross Mackay Kentucky Geodetic Advisor
ross.mackay_at_ky.gov on the web at ngs.ky.gov (502
) 564-1474