2.2 David Moore - Integration of Use of GPS for Asset ......Trials with DSE using VICpos DGPS trial using the Trimble GeoXT GPS along the Bellarine Peninsula Results (July.’05) Mean

Newtech

Colac, November 2005

Newtech

Colac, November 2005

Integration of Use of GPS for Asset

Recording within Barwon Water

David Moore

Spatial Information Surveyor

This Presentation IncludesThis Presentation Includes

� History of GPS use

� Use of GPS within BW

� Current approach to “as constructed” recording

� Trials with DSE using VICpos

� Trials with DSE using MELBpos

� Future Directions of GPS within BW

History of GPS within Barwon WaterHistory of GPS within Barwon Water

� 1995 Began hiring GPSto coordinate aerialphotography

� 1998 Purchased 2 singlefrequency units forcontrol and mapping

� 1998 Establishment ofGeelong GPSnet basestation

� 2002 Upgraded to dualfrequency geodetic unitswith real time positioning

Existing Use of GPS within Barwon WaterExisting Use of GPS within Barwon Water

Geodetic Network Extensions

Geelong 3rd Order Network

(940 marks)

Bellarine 3rd Order Network

(832 Marks)

Otway 3rd Order Network

(811 Marks)

Existing use of GPS within Barwon WaterExisting use of GPS within Barwon Water

Surveillance Monitoring

Existing use of GPS within Barwon WaterExisting use of GPS within Barwon Water

� Asset Capture by sub meter GPS -water fixtures in rural areas

� Establishment of control for majorprojects

� Hydrographic surveys

“As constructed” recording ….“As constructed” recording ….

By survey trained operators it’s precise, reliable and well documented .

Node attributes Link attributesGeometry

� He relies on measuring by tapes, wheels and ?

� Sometimes road and boundary fences are missing or wrong

� Often only one person is available to do the recording

� OHS issues when measuring across roads

� Return trips often necessary – missed or erroneous measurements,so its all time consuming

� If surveyors are called in the infrastructure is usually buried by thetime they get there

but when the works foreman has to do it …

“As constructed” recording ….“As constructed” recording ….

So - can GPS help here as well ??So - can GPS help here as well ??

What if the works foreman could GPS the fitting locations as they arelaid,

AND record the pipe attributes all at the same time?

We set out to see what could be done, using the new GPS infrastructurebeing deployed by DSE – VICpos and MELBpos,

And

can we do it AND still achieve our prescribed accuracy standards?

Map Base

Assets

� Urban areas with infrastructure: +/- 0.1m to 0.3m absolute

� Rural areas with infrastructure: <1m abs

� Rural areas (no infrastructure): 5 to 25m abs (Vicmap)

� Urban areas: H +/- 0.1m to 0.3m to title pegs/PSMs

� Rural areas: Project specific

� Urban areas: V +/- 0.02m to project control

GIS Spatial Accuracy StandardsGIS Spatial Accuracy Standards

VICposVICpos

VICpos is the integration of the post-processing service currentlyavailable (GPSNet) and the new real-time service founded onVictoria’s GPS Continually Operating Reference Station (CORS)network, (12 GPSNet base stations)

VICpos is designedto provide sub-meterpositioning byeither postprocessing or inreal time, via amobile phonelink

Trials with DSE using VICposTrials with DSE using VICpos

� Initial DGPS test using the Trimble GeoXT GPS at North Geelong Results(Feb.’05)

Mean Result

0.39MEasting Northing Delta E Delta N

PM 129 MGHURK 265711.89 5783670.50

PM 129 A MGHURK 265712.29 5783670.55 -0.40 -0.05

PM 129 B MGHURK 265712.10 5783670.86 -0.21 -0.36

PM 129C MGHURK(5MINS)265712.09 5783670.81 -0.21 -0.32

PM 43 MGHURK 265606.91 5784226.08

PM 43 A MGHURK 265607.22 5784226.72 -0.31 -0.65

PM 43 B MGHURK 265607.27 5784226.00 -0.36 0.07

PM 43 C MGHURK 265607.00 5784225.99 -0.09 0.08

PM 30 MGHURK 266675.66 5783709.24

PM 30 A MGHURK 266676.27 5783709.76 -0.61 -0.52

PM 30 B MGHURK 266675.75 5783709.14 -0.09 0.10

PM 30 C MGHURK 266675.92 5783709.29 -0.26 -0.05

Linear

Displacement

0.40

0.42

0.38

0.72

0.37

0.12

0.80

0.13

0.26

Trials with DSE using VICposTrials with DSE using VICpos

� DGPS trial using the Trimble GeoXT GPS along the Bellarine PeninsulaResults (July.’05)

Mean Result

0.28mPt.ID Easting Northing Comments dE dN

Tower Rd 293334.98 5777826.44 Trimble Static

Reduce to

Geelong GPSNet

tower rd 1 293335.23 5777826.20 GeoXt 0.24 -0.24

tower rd 2 293335.34 5777826.89 GeoXT 0.35 0.45

PM 106 294133.23 5779067.24 SMES/Profis dE dN

pm 106a 294133.20 5779067.23 GeoXt -0.04 -0.01

pm 106b 294133.22 5779067.62 GeoXt -0.01 0.38

pm 106c 294133.18 5779066.97 GeoXt -0.05 -0.27

pm 106d 294133.12 5779067.21 GeoXt -0.11 -0.04

PM 219 295092.81 5779108.46 SMES/Profis dE dN

pm219a 295092.92 5779108.57 GeoXt 0.11 0.12

pm 219b 295093.17 5779108.96 GeoXt 0.36 0.51

pm219c 295092.68 5779108.43 GeoXt -0.13 -0.03

pm219d 295092.83 5779108.28 GeoXt 0.02 -0.18

Linear

Displacement

0.34

0.57

0.04

0.38

0.27

0.11

0.16

0.62

0.14

0.18

Trials with DSE using MELBposTrials with DSE using MELBpos

� Currently BW with Spatial Information Infrastructure (DSE) are field testing theMELBpos Base Station Network (GPSNet). The trial involved a Trimble R8using RTK Networked Solution corrected positions and Single Base GPSNetpositions within the Ballarat, Bacchus Marsh and Geelong GPSNet triangle.

Trials with DSE using MELBposTrials with DSE using MELBpos

� Issues being investigated are:

- Mobile Phone Coverage

- GPRS Coverage

- Initialisation times ( 25sec – 45 sec)

- Accuracies (+/- 2cm)

- Repeatability

Future Directions of GPS within BWFuture Directions of GPS within BW

� Introduction of GPS technology into other Divisions of BW.

� Identify appropriate GPS for data acquisition.

� Create a common data dictionary for all to use when recording

assets.

� Develop a computer based design / as constructed / GIS capture

process.


� Introduction of GPS technology into other Divisions of BW.

We have begun to introduce GPS within other areas of BW outside of ourLand Information Unit.

A Trimble GeoXT has been purchased for:

- Water Supply

(Location & Navigation to Rural Assets, Bores, Works Requirements….)

- Customer Operations (Reserves)

(Mapping & Navigation to nesting Boxes at Bannockburn STP,

recycled effluent property dams…..)

All data is post processed to the Geelong GPSNet Base Station. Both of thesedepartments locate assets in the Rural areas, thus the accuracy of sub-meteris all that is required.


� Identify appropriate GPS for data acquisition

We are currently assessing the most appropriate way to locate as constructedassets by Systems Maintenance within the Urban Areas.

The GeoXT Sub meter GPS unit was tested by our Maintenance Crew on two

as constructed jobs

- Queenscliff Rd, Newcombe

- Settlement Rd, Belmont

The Systems Maintenance Crew were able to be trained easily in the use ofthe Sub Meter GPS Unit.

However, the accuracy of the data, post processed, was +/- 0.5m. This isoutside our required GIS accuracy for the Urban Areas.


� Queenscliff Road comparisons GeoXT to Feature survey by TCR1103

Total Station: (Mean Results +/- 0.51m)

Project No. 8303

Queenscliff Road Water Main Location

RTK Coords GeoXT Coordinates

Pt.ID Node Number Easting Northing Easting Northing dE dN

FP 1 272145.96 5771849.15 272146.36 5771849.13 -0.40 0.02

SV 2 272146.85 5771848.87 272147.29 5771848.76 -0.44 0.11

90^ 4 272146.55 5771846.27 272146.38 5771846.18 0.17 0.09

FP 5 272154.08 5771843.74 272154.58 5771843.98 -0.50 -0.24

SV 7 272187.58 5771833.34 272188.19 5771833.97 -0.61 -0.63

TAPPING 9 272276.74 5771804.63 272276.91 5771804.34 -0.17 0.28

FP 10 272295.35 5771798.69 272295.95 5771798.70 -0.60 -0.01

SV 12 272450.96 5771749.00 272451.58 5771749.48 -0.62 -0.47

LOM 14 272471.24 5771742.58 272471.40 5771742.53 -0.16 0.05

SV 15 272472.51 5771751.22 272472.48 5771751.52 0.03 -0.30

FP 16 272472.78 5771753.33 272472.89 5771754.10 -0.11 -0.77

FP 17 272477.17 5771740.61 272477.54 5771741.26 -0.37 -0.66

SV 18 272477.87 5771740.38 272478.05 5771741.10 -0.17 -0.72

FP 19 272478.50 5771740.20 272478.63 5771740.76 -0.14 -0.56

dL

0.39

0.44

0.22

0.53

0.85

0.33

0.60

0.75

0.16

0.29

0.77

0.73

0.72

0.56


Settlement Road comparisons GeoXT to RTK survey: (Mean Result +/- 0.40m)

GeoXT Coords RTK Coords

Pt.Id. Node No. Easting Northing Easting Northing RL De Dn

PT 1 267937.47 5770910.51 267937.85 5770910.08 11.62 0.37 -0.44

90^ 2 267940.33 5770909.44 267940.12 5770909.25 11.44 -0.21 -0.19

FP 3 267941.91 5770912.89 267941.48 5770912.59 11.42 -0.44 -0.30

SV 4 267942.33 5770913.71 267941.89 5770913.54 11.37 -0.44 -0.16

PT 5 267945.65 5770923.08 267945.64 5770922.86 11.26 -0.01 -0.22

T 6 267945.92 5770923.57 267945.75 5770923.36 11.27 -0.17 -0.21

90^ 7 267951.90 5770922.77 267951.78 5770922.65 11.38 -0.12 -0.12

MAT 8 267952.06 5770923.11 267951.91 5770922.98 11.34 -0.15 -0.12

11^25' 9 267974.96 5770989.33 267974.55 5770988.93 11.11 -0.41 -0.40

T 10 267980.25 5771032.82 267979.81 5771032.80 11.03 -0.44 -0.02

FP 11 267980.71 5771036.74 267980.36 5771036.81 11.15 -0.36 0.08

SV 12 267980.52 5771038.10 267980.47 5771037.87 11.07 -0.05 -0.23

FP 13 267980.84 5771039.00 267980.58 5771038.91 11.13 -0.26 -0.10

T 14 267985.08 5771075.54 267984.94 5771075.89 10.85 -0.14 0.35

Linear

Displacement

0.57

0.28

0.53

0.47

0.22

0.27

0.17

0.19

0.57

0.44

0.37

0.24

0.28

0.38


� The ProXH is currently being tested for as constructed capture within theUrban Areas.

� Our first field test suggests that this may be the best method of locating assetsto an accuracy of < 0.2m without having to invest +/- $60000.

� Software used by the ProXH is TerraSync.

� Able to give accuracy estimates whilst measuring.

� A minimum of two minutes continuous clear sky is required to achieveaccuracies of <0.2m.


�The mean result of our field test at Camellia Cres. Norlane was +/- 0.15m.

ProXH Coords RTK Coords

Pt.Desc. Easting Northing Easting Northing dE dN

ex fp1 268865.51 5781093.27 268865.33 5781093.25 -0.18 -0.02

node 1 start 268861.65 5781090.15 268861.47 5781090.13 -0.18 -0.02

node 2 268865.67 5781093.69 268865.44 5781093.72 -0.24 0.03

node 3 90 deg bend 268865.73 5781094.24 268865.55 5781094.33 -0.18 0.10

node 4 90 bend 268867.16 5781094.08 268866.99 5781094.10 -0.17 0.01

node 5 off-set no66/68 268873.85 5781146.95 268873.58 5781146.72 -0.28 -0.24

node 6 tee 268877.77 5781178.72 268877.59 5781178.76 -0.19 0.04

node 7 off-set 58/60 268881.33 5781207.16 268881.11 5781207.18 -0.22 0.03

node 46 mat 268894.87 5781281.47 268894.83 5781281.52 -0.04 0.05

node 45 22 deg bend 268890.90 5781282.13 268890.82 5781282.19 -0.08 0.06

node 44 fp 268882.64 5781280.19 268882.57 5781280.24 -0.07 0.06

node 43 sv 268881.84 5781280.01 268881.76 5781280.06 -0.08 0.05

node 41 100 x 90 bend mat-ch268890.92 5781174.56 268890.89 5781174.55 -0.02 -0.01

node 40 100 x 45 bend 268888.54 5781177.39 268888.48 5781177.39 -0.05 0.00

node 39 fp 268878.92 5781178.59 268878.87 5781178.62 -0.05 0.02

node 38 sv 268878.21 5781178.68 268878.18 5781178.68 -0.03 0.00

Linear

Displ.

0.18

0.18

0.24

0.21

0.17

0.37

0.19

0.22

0.06

0.10

0.09

0.09

0.03

0.06

0.05

0.03


� The ProXH was used on the Settlement Road site and the mean result was

+/- 0.05m.

RTK Coords ProXH Coords

Pt.Id. Node No. Easting Northing Easting Northing RL De

FP 3 267941.48 5770912.59 267941.513 5770912.563 -0.037 0.026

SV 4 267941.89 5770913.54 267941.917 5770913.48 -0.032 0.063

T 6 267945.75 5770923.36 267945.746 5770923.228 0.003 0.128

T 10 267979.81 5771032.80 267979.89 5771032.866 -0.081 -0.063

FP 11 267980.36 5771036.81 267980.349 5771036.835 0.008 -0.022

SV 12 267980.47 5771037.87 267980.472 5771037.883 -0.007 -0.018

FP 13 267980.58 5771038.91 267980.57 5771038.953 0.009 -0.046

SV 15 267985.26 5771075.84 267985.29 5771075.902 -0.030 -0.065

FP 18 267992.03 5771144.89 267992.054 5771144.977 -0.029 -0.087

SV 19 267991.32 5771144.97 267991.337 5771145.067 -0.022 -0.095

SV 30 267978.41 5771033.00 267978.421 5771033.044 -0.008 -0.048

FP 31 267977.42 5771033.17 267977.439 5771033.214 -0.019 -0.047

90^ 32 267968.84 5771034.34 267968.906 5771034.349 -0.067 -0.012

SV 37 267941.66 5770923.79 267941.699 5770923.745 -0.038 0.047

FP 38 267940.76 5770923.85 267940.795 5770923.84 -0.035 0.011

Linear

Displ.

0.05

0.07

0.01

0.10

0.02

0.02

0.05

0.07

0.09

0.10

0.05

0.05

0.07

0.06

0.04


� Develop a computer based design / as construct / GIS capture process.

� Our Asset Development engineers design water main replacements /extensions in Microstation format (A1).

� We are developing an A4 proforma

to enable enlargements of critical

node areas from the design plan.

� These diagrams will be used by the

Systems Maintenance crew for

identifying and recording node numbers

and radiations that may be measured.


A Data Dictionary has been developed based on the Developer Works Table.

This will allow consistency of data collection and presentation to our GIS group.

Within the GPS data dictionary, each feature has associated attributes.

- Node Number

- Pipe Diameter

- Pipe Material

- Date Laid

- Depth


These are key requirements for the

assets to be correctly defined within

Profis.


Barwon Wate r - Deve lope r Works Manual - Survey (MGA ve rs ion)

Water Supply - Main Locations

Nodes Table

For definitions se e Wa te r Nodes Definition Tables in Section 3.2

No. Code Dia (mm) Mate rial Date Laid Depth (m)

Eas ting Northing

1 MAT 100mm PVC 20/09/2005 0.6 268861.47 5781090.13

2 P 100mm PVC 20/09/2005 0.65 268865.44 5781093.72

3 90deg 100mm PVC 20/09/2005 0.7 268865.55 5781094.33

4 90deg 100mm PVC 20/09/2005 0.7 268866.99 5781094.1

5 offs e t 268873.58 5781146.72

6 T 100mm PVC 20/09/2005 0.6 268877.59 5781178.76

7 offs e t 268881.11 5781207.18

8 offs e t 268884.76 5781243.19

9 T 100mm PVC 20/09/2005 0.65 268880.89 5781279.87

10 FP 100mm PVC 20/09/2005 0.7 268865.32 5781319.59

11 SV 100mm PVC 20/09/2005 0.65 268864.84 5781320.38

12 FP 100mm PVC 20/09/2005 0.6 268864.44 5781321.14

13 T 100mm PVC 20/09/2005 0.6 268850.05 5781341.63

14 offs e t 268822.15 5781367.39

Co-ords (If us ed) (MGA Zone 55)

An example of data captured on the Camellia Cres.


� The benefits of this data process are:

� - Resolves OHS issues of measurements across roads.

� - Ensure consistent accuracy of capture assuming correct

field techniques are adopted.

� - Elimination of field staff having to measure radiations to

occupation.

� - Eliminates potential transcription errors

� - Accelerates the capture process within the GIS (Profis)

SummarySummary

� With the Introduction of the VICpos and MELBpos Networks, we

have greater flexibility in how we Locate and / or Navigate to

Assets.

� For Urban and Rural Asset Capture:

ACCURACIES

REQUIRED GeoXT ProXH Trimble R8

5M - 25M Uncorrected Uncorrected Uncorrected

0.5M - 1.0M Post Processed - -

& Real Time

< 0.2M - Post Processed -

0.02M - - Post Processed

& Real Time

EQUIPMENT TRIALLED

Documents

2.2 David Moore - Integration of Use of GPS for Asset ......Trials with DSE using VICpos DGPS trial using the Trimble GeoXT GPS along the Bellarine Peninsula Results (July.’05) Mean