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Low-Cost Asset Management
Eric Green, GISP, PE
Agenda
Free GIS tools
Geo-tagging for asset management
Linking collected data to assets
Low Cost Sign Management
Free GIS Tools
Free GIS Tools
MapWindow
DotSpatial
Google Maps
usRAP
MapWindow
Four versions MapWindow 4.x MapWindow 6 (work in progress) MapWINGIS DotSpatial
Free!
Open source
Huge, academic community
MapWindow 4.x Application
GIS User Free map viewer Editor Map making tools
ArcGIS-lite
Extend functionality via plugins Kriging, photo viewer, water quality, streamflow Safety Software Suite (crash and signs) AutoCAD exporter
http://www.mapwindow.org
MapWindow Toolbox
Buffer shapes
Vector overlays, including intersection and union
Various clipping operations, including clip using shapefile or polygon mask
Dissolve shapes by attribute
Calculate polygon areas
Various projection functions
Several raster operations, including clip by polygon, merge grids, and reclassify
MapWindow 6
MapWINGIS
MapWinGIS.ocx is a FREE and OPEN SOURCE C++ based geographic information system programming ActiveX Control and application programmer interface (API)
Add to a Windows Form in Visual Basic, C#, Delphi, or other languages that support ActiveX
Give your application a powerful GIS map
Used to make MapWindow 4.x
http://mapwingis.codeplex.com/
Example MapWINGIS Apps
MapClick
Police used to collect crash data using paper reports and handheld GPS receivers
KTC created a free, offline map system allowing officers to click a point on the map and return the lat/long and LRS (county., route and milepoint)
MapClick
SignProx
MapWINGIS is usable even for commercially available products
Useful built-in features: Geo-tagging Geo-coding Symbology Thumbnails GPS integration Shapefiles/aerials Search Pan, Zoom …
GoogleMaps API BuildUp
Using a free .Net wrapper for Google’s java API for Google Maps Gmap for ASPX pages http://googlemaps.subgurim.net
http://buildup.ukytc.com/ buildup crashrate@1
Google maps
Google maps
usRAP
Geo-tagging for Asset Management
Google Street View Coverage
Our Task
Street View Coverage
No Street View Coverage
Find a way to display images of roadways on a computer screen where Google Street View does not have coverage.
Rich Man’s Photo Log
100-Meter Points
In the Field
Nikon CoolPix p510 – GPS Enabled Digital Camera (~$300)
In the Field
In the Field
Adding Pictures to Map
Geo-tagged photos linked to point shapefile
ID and Picture file name in one table
Geo-tag Processing…
Joining Pictures to 100m Points
ESRI ArcGIS - Spatial Join Each 100m point along the roadway was joined with the nearest picture
Each 100m point was given the picture ID nearest to it
GPS Accuracy Issues
GPS Location Updating Error
Dot Density
GPS Location Updating Error
Identified 100-meter dots joined to the same picture ID
Started from last 100-meter point with an accurately located matching picture
Determined 100-meter point where GPS location started updating again
Interpolated the number of pictures needed between these two
A
B
C
D
E
1
17
A
B
C
D
E
1
17
5
9
13
usRAP
Quality Control
An Excel formula was used to open Google Street View or the nearest local picture as appropriate for each rated section (100-meter point)
This helped us quality control the rated data
Linking Data to Assets
Eric
Devices Available in the US
Model GR3 by Delta
http://www.tapconet.com/digital
Model 922 by Road Vista
http://www.roadvista.com
Where to get a retro gun?
Purchase through distributors Delta – Tapco RoadVista – Professional Pavement Products
Rent through distributors
Loan programs (LTAP or DOTs)
Share procurement with nearby agencies
Linking Delta to an Inventory - Delta
Low-tech collection process
Take geotagged photos of signs assemblies
Take retroreflectivity readings at a specified time interval Requires a two-man crew
take photos retroreflectivity readings
Time keepers need to be in synch
Create inventory from geotagged photos
Link retroreflectivity data to inventory
Specific Collection Process
Take a photo
Instruct retro gun operator to take a reading immediately
Take first set of four readings within seconds of the photo being taken
Take each reading within seconds of each other
Wait 10 seconds before reading the second color (if it exists)
Collect background first then legend
Wait at least 30 seconds before doing the next sign
Collect signs starting at top left and work down first then right
Wait at least 5 minutes before moving to the next assembly (make sure the photo taker does too)
Collection Grid
The following grid shows the order of readings
1 7 13 19 252 8 14 20 263 9 15 21 274 10 16 22 285 11 17 23 296 12 18 24 30
Merging Data
Use excel or ArcGIS to merge the photos with retroreflectivity readings
Identify 30 second gaps in timestamps to determine if readings are for a new sign
Identify 5 minutes gaps in timestamps to determine when a new assembly was collected
This technique was used fora small city in Kentuckyfor a GIS course project atUK
Linking Delta to an Inventory - RoadVista
High- or Low-tech collection process
Recommended RoadVista gun with bar code reader Bar code stickers Sign Inventory software Smart phone with GPS and camera or GPS-enabled
camera USB or Bluetooth GPS receiver Dry erase marker
High-Tech
Select a new, unused barcode ID
Stick barcode sticker to back of the sign
Scan barcode sticker using RoadVista scanner
Take as many retro readings for the first color
If there is a second color change the RoadVista to legend
Inventory sign in the field using a laptop and a GPS receiver
Prepare inventory to receive a Bluetooth transmission
BarCode ID, background and legend retro readings will be transferred along with any standard and user comments
Low-Tech
Scan barcode
Take retroreflectivity readings as described above
Add any user or standard comments
Take a photo with a GPS enabled camera (iPhone, Android, Trimble GeoXT, etc.)
Be sure to include the bar code ID such that it is readable
Import the geotagged photos into sign inventory system
Use the picture to code the sign type and barcode ID
Import the RoadVista data into sign inventory system
All data with matching barcode IDs will be merged
BarCode IDs in Pictures
Low Cost Sign Management
Eric
Accepted Changes
http://mutcd.fhwa.dot.gov/knowledge/09mutcdproposedrev/compliance_dates/
Assessment and Management Methods
Visual Inspection Method Comparison Panel Procedure Calibrated Sign Procedure Consistent Parameter Procedure
Measure Sign Retroreflectivity
Expected Sign Life
Blanket Replacement
Control Signs
Overview of Kentucky’s Sign Management Program
Create an inventory of those signs that are already installed
Collect inventory data on new signs as they are being installed through routine maintenance, new installation on existing routes, and installation on newly constructed routes
Determine intermediate retroreflectivity management methods that may be needed temporarily in order to meet the FHWA deadlines
Determine ultimate retroreflectivity management method that will be used once the program is fully developed
•Had not been updated
•Various data formats
•Non-existent in some Districts
•No Statewide mandate to track sign Location
•No Central Office repository for data
Outdated Linear Reference System Sign Location Documents
Georeferenced Asset Location
Sign Inventory
Photo Log Van SignProx
2 Options for Data Collection:
KYTC Asset Collection Vehicle
Right of Way Cameras3 cameras; One facing forward, right and left
Global Positioning SystemIncludes Differential and Inertial Measurement SystemsSub-meter accuracy at highway speedsInertial Measurement System retains correct position during GPS Dropouts
Distance Measure Instrument
Roughness MeasurementDynatest Mark IV RSP
Rutting MeasurementINO Laser Rut Measurement System1280 Transverse points
KYTC Photo Log
http://maps.kytc.ky.gov/photolog/
KYTC Photo Log
Panoramic View
Photo Log Collection:
• Very accurate GPS
• Other data being collected when route driven
• Safer Urban collection
• Link to Object photo saved in database
• No travel time to collect objects from available data
KYTC Photo Log Advantages
Equipment required:
• Laptop
• GPS device
• Vehicle
Collection method:
• Locate Asset by clicking map location
• Locate Asset by GPS Tracking
SignProx
SignProx
Faster collection
Less costly collection
Less tedious collection method
Collect areas not driven by Photo Log vehicle
Less likely to miss signs
Available Sign Management Methods
Nighttime Visual Inspection• Low administrative and fiscal burden• Low level sign waste• Human error• Exposure of conducting inspections
Measured Retroreflectivity• Removes subjectivity• Time consuming• Expensive
Blanket Replacement• Low administrative• High sign waste• High dedicated budget
Sign Total Estimate
Total Replacement Cost ($70 per sign)
Seven Year Blanket Replacement Cycle
Costs566,000 $39,620,000 $5,660,000*
Sign Total
Estimate
Measured Retroreflectivity
Hours (10 signs per hour)
Estimated Cost ($40 per hour)
Number of Signs Requiring Replacement (6% of total)
Cost of Replacing Signs ($70 per
sign)
Total Estimate for MR (signs and
inspection)566,000 56600 $2,264,000 33960 $2,377,200 $4,641,200*
Sign Total
EstimateNTVI Hours (40 signs per hour)
Estimated Cost ($40 per hour)
Number of Signs Requiring Replacement (6% of total)
Cost of Replacing Signs ($70 per
sign)
Total Estimate for NTVI (signs and
inspection)566,000 14150 $566,000 33960 $2,377,200 $2,943,200*
Estimated Costs of Methods
• Replace all failing or damaged signs• Bar code all new sign installations• Tie bar code to a matching control panel
(installed in the same season)• Replace in-field signs as control panels begin to
fail• Use bar codes and GIS to create replacement
reports
Ultimate Method
Contact
Eric Green, PE, GISP Research Engineer
Traffic and Safety Program859-257-2680
