Post on 11-Jun-2020
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.
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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.
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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.
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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
Future Directions of GPS within BWFuture Directions of GPS within BW
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
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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.
Future Directions of GPS within BWFuture Directions of GPS within BW
�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
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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.
Future Directions of GPS within BWFuture Directions of GPS within BW
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
Future Directions of GPS within BWFuture Directions of GPS within BW
These are key requirements for the
assets to be correctly defined within
Profis.
Future Directions of GPS within BWFuture Directions of GPS within BW
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.
Future Directions of GPS within BWFuture Directions of GPS within BW
� 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