Sample GPS Coordinate Survey

This is an example of a pure GPS coordinate survey.  Here, the only objective is to determine high accuracy coordinates on specified points.  The primary advantage of GPS is that it allows a surveyor to measure distances and directions between points over very long distances in a very short time.  George A. Shimp II & Associates utilizes 4 Ashtech Locus GPS receivers on GPS projects.  This allows us to measure baselines up to 12 miles in as little as 1 hour.  This would have taken days by traditional surveying methods.

This is a sample of a project in which we tied two plat PRMs (Permanent Reference Monuments) and two NGS (National Geodetic Survey) control monuments.  This report is a detailed account of all the relative information.  It includes the coordinate positions of the unknown stations, information about the control monuments, datum definition, vector processing results, and network adjustment statistics.  Also, each survey is delivered with a signed and sealed survey report.

This is a portion of the final survey map, edited to save page loading time.

 

Site Positions

 

Horizontal Coordinate System: 

State Plane Coordinate 1983  
Date: 10/02/00
Height System: Ortho. Ht. (GEOID96)
Project file:  000171.spr 
Desired Horizontal Accuracy: 0.033USft + 1ppm
Desired Vertical Accuracy:  0.066USft + 1ppm
Confidence Level: 95% Err.
Linear Units of Measure: US Feet

 

#

Site

ID

Site Name

Position

95%

Error

Fix

Status

Position

Status

1.

0001

Z13 034 (NGS)

East.

Nrth.

Elev.

 465283.766

1399711.961

57.080

0.000

0.000

0.000

Fixed

Adjusted

2.

0002

Z13 033 (NGS)

East.

Nrth.

Elev.

465415.797

1396584.779

50.142

0.000

0.000

0.000

Fixed

Adjusted

3.

0003

PRM FCM 4X4 LS 4281

East.

Nrth.

Elev.

466664.072

1397975.783

53.663

0.008

0.012

0.010

 

Adjusted

4.

0004

PRM FCM 4X4 LS 4281

East.

Nrth.

Elev.

465526.368

1397132.575

 52.935

0.012

0.010

0.015

 

Adjusted


#

SITE

ID

Control Site Name

Convergence

Scale

Factor

Elevation

Factor
1.

 0001

Z13 034 (NGS)

 -0 0.000

0.999983

1.00000124
2.

0002

Z13 033 (NGS)

 -0 0.000

0.999983

1.00000156
3. 0003 PRM FCM 4X4 LS 4281 -0 0.000  0.999982 1.00000140
4. 0004 PRM FCM 4X4 LS 4281 -0 0.000 0.999983 1.00000143


 

Control Site Positions

Horizontal Coordinate System: 

State Plane Coordinate 1983  
Date: 10/02/00
Height System: Ortho. Ht. (GEOID96)
Project file:  000171.spr 
Desired Horizontal Accuracy: 0.033USft + 1ppm
Desired Vertical Accuracy:  0.066USft + 1ppm
Confidence Level: 95% Err.
Linear Units of Measure: US Feet

 

#

SITE

ID

Control Site Name

Position

95%

Error

Control

Type

Fix Status
1.

 0001

Z13 034 (NGS)

East.

Nrth.

Elev.

465283.766

1399711.961

 57.080

0.000

0.000

0.000

Hor/Ver

Fixed
2.

0002

Z13 033 (NGS)

East.

Nrth.

Elev.

465415.797

1396584.779

50.142

0.000

0.000

0.000

Hor/Ver

Fixed

 

#

SITE

ID

Control Site Name

Convergence

Scale

Factor

Elevation

Factor
1.

 0001

Z13 034 (NGS)

 -0 0.000

0.999983

1.00000124
2.

0002

Z13 033 (NGS)

 -0 0.000

0.999983

1.00000156



Coordinate System Definition Summary


Linear Units of Measure:                        

Date:                                                           
Project file:                                                

US Feet

10/02/00   
000171.spr

Local Grid System

Name:                               

Transformation Parameters:

 

 

 

E Translation     =      0.000m
N Translation     =      0.000m
Z Rotation        =      0.000000"
Scale Diff. (ppm) =      0.000000

Note:  Parameters define transformation from BASE GRID SYSTEM to LOCAL GRID SYSTEM

Geodetic Datum

Name:

 

Reference Ellipsoid: 

 

 

                              
Transformation Parameters:

 

 

 

 

 

North American 1983-CONUS


GRS80
a   = 6378137.000m
1/f = 298.257222101


X Translation     =      0.000m
Y Translation     =      0.000m
Z Translation     =      0.000m
X Rotation        =      0.000000"
Y Rotation        =      0.000000"
Z Rotation        =      0.000000"
Scale Diff. (ppm) =      0.000000

Note:  Parameters define transformation from LOCAL SYSTEM to WGS84

Grid System

 Name:
 

Projection Type:

 Zone Name:

 Zone Parameters:

 

 

 

 

 

State Plane Coordinate 1983

TM83

Florida (West)

Longitude of Central Meridian =  082°00'00.00"W
Scale factor at Central Meridian =  17000.000000 m
Longitude of the grid origin =  082°00'00.00"W
Latitude of grid origin =   24°20'00.00"N
False easting (m) =    200000.000 m
False northing (m) =    0.000 m

 


Occupation Information


Time System:  UTC
Date: 10/02/00
Linear Units of Measure: US Feet
Project file:  000171.spr

 

#

SITE

ID

Antenna

Slant

Antenna

Radius

Antenna

Offset

Start

Time

End

Time

File

Name
1. ???? 0.000 0.000 6.970 15:00:20 15:07:00 B2176A00.069
2. 0001 0.000 0.000 6.970 15:07:00 15:35:10 B2176A00.069
3. ???? 0.000 0.000 6.970 15:35:10 15:42:10 B2176A00.069

4.

0002

0.000

0.000

6.970

15:07:00

15:30:40

B2101A00.069

5.

????

0.000

0.000

6.970

15:30:40

15:33:40

B2101A00.069

6.

0003

0.000

0.000

6.970

15:17:00

15:31:30

B2141A00.069

7.

0004

0.000

0.000

6.970

15:08:00

15:39:10

B2151A00.069

 


Project Files

 

Time System:  UTC
Date: 10/02/00
Project file:  000171.spr

 

#

File

Name

Start

Date & Time

End

Date & Time

Recording

Intrvl (sec.)

Epochs

File Size

(bytes)

1.

B2176A00.069

03/09/00

15:00:20

03/09/00

15:42:10

10.0

251

87219

2.

B2101A00.069

03/09/00

15:07:00

03/09/00

15:33:40

10.0

160

49622

3.

B2141A00.069

03/09/00

15:17:00

03/09/00

15:31:30

10.0

87

30556

4.

B2151A00.069

03/09/00

15:08:00

03/09/00

15:39:10

10.0

187

65256


 

Project Summary


Project file:  000171.spr
Date: 10/02/00
Client Name:  Simmons & Beall, Inc.
Project Name:   000171
Project Comments: GPS Tie of 2 PRMs at Parker Point Phase II
Desired Horizontal Accuracy:
Desired Vertical Accuracy:
Confidence Level:		 0.033USft + 1ppm
0.066USft + 1ppm
95% Err.
Horizontal Coordinate System:
Height System:
Linear Units:		 State Plane Coordinate 1983
Ortho. Ht. (GEOID96)
US Feet
Number of Sites:
Number of Vectors:		 4
6
Survey Company Name: George A. Shimp II & Assoc., Inc.

 


Processed Vectors


Vector Stage:

Date:
Horizontal Coordinate System:

Project file:                
Height System:
Desired Horizontal Accuracy:
Desired Vertical Accuracy:
Confidence Level:
Linear Units of Measure:

Processed

10/02/00
State Plane Coordinate 1983  

000171.spr                 
Ortho. Ht. (GEOID96)       
0.033USft + 1ppm
0.066USft + 1ppm
95% Err.
US Feet

 

#

Vector Identifier

Vector

Length

95%

Error

Vector

Components

95%

Error

Process

QA

1.

0001-0003  3/09 15:17

2218.043

0.022

X

Y

Z

1482.102

-627.855

-1526.069

0.007

0.013

0.016

 

2.

0001-0004  3/09 15:08

2590.813

0.018

X

Y

Z

409.570

-1170.874

-2274.559

0.006

0.012

0.012

 

3.

0004-0003  3/09 15:17

1416.135

0.023

X

Y

Z

1072.535

543.017

748.493

0.007

0.015

0.016

 

4.

0001-0002  3/09 15:07

3130.040

0.113

X

Y

Z

335.655

-1439.163

-2759.220

0.076

0.069

0.047

 

5.

0002-0003  3/09 15:17

1869.012

0.035

X

Y

Z

1146.478

811.226

1233.169

0.008

0.028

0.020

 

6.

0002-0004  3/09 15:08

558.872

0.153

X

Y

Z

73.914

268.273

484.669

0.114

0.095

0.036

 



 Adjusted Vectors


Vector Stage:

Date:
Horizontal Coordinate System:

Project file:                
Height System:
Linear Units of Measure:

Adjusted

10/02/00
State Plane Coordinate 1983  

000171.spr                 
Ortho. Ht. (GEOID96)       
US Feet

 

#

Vector Identifier 

Vector

Length

Radial

Residuals

Vector

Components

Residuals

Tau

Test

1.

0001-0003  3/09 15:17

2218.046

0.005

X

Y

Z

1482.105

-627.858

-1526.069

0.003

-0.004

-0.000

 

2.

0001-0004  3/09 15:08

2590.813

0.001

X

Y

Z

409.570

-1170.874

-2274.559

-0.001

0.000

-0.001

 

3.

0004-0003  3/09 15:17

1416.134

0.003

X

Y

Z

1072.535

543.016

748.490

0.000

-0.001

-0.002

 

4.

0001-0002  3/09 15:07

3130.025

0.068

X

Y

Z

335.636

-1439.100

-2759.238

-0.019

0.063

-0.018

 

5.

0002-0003  3/09 15:17

1869.012

0.018

X

Y

Z

1146.468

811.242

1233.169

-0.010

0.016

-0.000

 

6.

0002-0004  3/09 15:08

558.860

0.052

X

Y

Z

73.933

268.226

484.678

0.020

-0.047

0.010

 


 

Adjustment Summary

 

Date: 10/02/00
Project file:  000171.spr 
Adjustment Type:  Fully Constrained
Variance of Unit Weight:  0.9
Adjustment scale factor: 1.00
Vectors Failing Tau Test:    0
Site Pairs Failing Relative Accuracy QA Test: 0
Vector Total:
Site Total:
Horizontally Constrained Sites:
Vertically Constrained Sites:		 6
4
2
2
Horizontal Coordinate System:
Height System:		 State Plane Coordinate 1983
Ortho. Ht. (GEOID96)
Desired Horizontal Accuracy:
Desired Vertical Accuracy:
Confidence Level:		 0.033USft + 1ppm
0.066USft + 1ppm
95% Err.

 


Network Relative Accuracy

 

Date: 10/02/00
Project file:  000171.spr 
Desired Horizontal Accuracy: 0.033USft + 1ppm
Desired Vertical Accuracy:  0.066USft + 1ppm
Confidence Level: 95% Err.
Linear Units of Measure: US Feet

 

#

Site

Pair

Relative

Error

Allow.

Error

Horizontal

Relative Acc.

Vertical

Relative Acc.

Distance

Site

Pair QA

1.

0001

0003

Lat

Lng

Elv

0.013

0.006

0.013

0.010

0.010

0.020

1:172464

1:172464

2218.046

 

2.

0001

0004

Lat

Lng

Elv

0.013

0.013

0.013

0.010

0.010

0.020

1:201449

1:201449

2590.813

 

3.

0004

0003

Lat

Lng

Elv

0.013

0.006

0.013

0.010

0.010

0.020

1:110111

1:110111

1416.134

 

4.

0001

0002

Lat

Lng

Elv

0.000

0.000

0.000

0.010

0.010

0.020

1:0

1:0

3130.025

 

5.

0002

0003

Lat

Lng

Elv

0.013

0.006

0.013

0.010

0.010

0.020

1:145325

1:145325

1869.012

 

6.

0002

0004

Lat

Lng

Elv

0.013

0.013

0.013

0.010

0.010

0.020

1:43455

1:43455

558.860

 

 

 

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