mobile gps/gis mapping for poles and vegetation€¦ · gis applications • manual field data...
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MOBILE GPS/GIS MAPPING FOR POLES AND VEGETATION
EGUG MEETINGNASHVILLE
OCTOBER 10,2007
PRESENTATION OVERVIEW
• Technology Overview– System components– Data Extraction
• Detection• Recognition• Results
• Applications & Benefits• Discussion
TECHNOLOGY
Highly productive land and aerial data collection solutions as applied to linear infrastructure assets over large territories.
WHY COLLECT DATA
• INVENTORY• SAFETY• MAINTENANCE• EMERGENCY RESPONSE• REGULATORY
HOW TO POPULATE DATA FOR GIS APPLICATIONS
• MANUAL FIELD DATA COLLECTION• ACCURATE BUT EXPENSIVE • SLOW. • SAFETY ISSUES.
FIELD DATA COLLECTION MOBILE MAPPING APPROACH
Has been used for sometime but the real advancement has come in
past few years
ADVANCED MOBILE MAPPING
• Technology filtered through CIA/ FBI AND OTHER SECURITY AGENCIES
TYPES OF MODES
• VAN BASED OR HELICOPTER BASED DATA COLLECTION
Variable Vehicle ConfigurationsVariable Vehicle Configurations
TECHNOLOGY WHERE APPLICABLE
_ Public Sector (Train, Bus, etc.)– Transportation (Road, Rail, Maritime, etc.)– Utilities (Telecom, Electric, Cable,
Gas, etc.)– Public Works (Municipalities, Counties,
etc.)– Real Estate (Addressing, Property
Assessment, etc.)– Public Safety (Homeland Security,
Emergency Services, etc.)
Hardware componentsHardware components
• Digital camera and other sensors. Multi • spectral cameras for foliage and vegetation• Inertial measurement unit• Differential GPS receiver• Data acquisition software - Kronos• Rack mount industrial computers• 2-D scanning laser (for automated detection)
DATA ACQUISITION-VIDEO LOGGING
TRIDENT -3D
Data extraction based on photogrammetric principles using only one camera (US Patent Pending)
Data extraction based on photogrammetric principles using only one camera (US Patent Pending)
FILE FORMATS
• During capture, images are recorded to AVI OR JPG files.
• Each image has GPS data, Time and Date, Linear information, as well as quality of GPS data.
• Position in X, Y & Z; sub- metric
• Length, height, area measurements
• Zoom function
• 3D Map interface
• Integrated GIS functions
• ODBC connectivity
• And more…
• Position in X, Y & Z; sub- metric
• Length, height, area measurements
• Zoom function
• 3D Map interface
• Integrated GIS functions
• ODBC connectivity
• And more…
Data Extraction Software Interface
Data Extraction Software Interface
DATA EXTRACTION
• MANUAL
• AUTOMATIC WITH UTILITY SOFTWARE
Manual Asset Extraction
Approximately 2 minutes per assetLocation extraction from user manipulationMeasurements from user manipulation (high level)
• Market pressure dictates need to reduce time and economic resources required for surveys
• 2 Dimensional laser scanning device is mounted on survey vehicle
• Collects a wealth of data• Automation of:
DetectionLocationRecognitionMeasurements
AUTOMATION
AUTOMATION
• The Laser’s intensity return is located on the image bit map and combined with pattern recognition using a library to identify assets.
• Image capture frequency can be per requirements based on distance or time
•Agglomeration of points are objects
•3D objects are distinct
•Generate a 3D point cloud
Automatic Asset Detection
•Geographical position assigned & measurements made
•Achieved through the use of filters and parameters
•Assets distinguished from surrounding environment
Automatic Asset Detection
•Asset identified as matching template from database
•Road sign libraries such as MUTCD can be used
Automatic Asset Detection
GIS CONNECTION
• ESRI Shape file export (SHP, SHX, DBF)• ODBC connectivity
– Connects layers to any ODBC data source (SQL server, Oracle, Access, DB2, etc.)
• Support for Relations– E.g. one support with traffic signals and multiple signs
• API to connect to Asset Management, GIS Clients, etc.
• Survey performed on Route 148 in Quebec, Canada (between Lachute & Gatineau)
• Evaluation of precision, timing, detection and accuracy rates of automated technology vs. manual extraction
CONTROL STUDY OF AUTOMATION
TEST• Length 23.7 miles
(37.8 km)• 416 signs detected,
located and measured
• Processing time 90 sec
Verification• 16 false detections
(<9%)• 1 missed sign (<1%)
Preliminary Testing of Automation
AUTOMATION-PRELIMINARY RESULTS
Manual Semi-AutoDetection / Locating / Measurement time
120 sec. / sign
15 sec. /sign
Detection rate 100 % 99 %False detection 0 % 9 % (*urban)Location precision* Sub-Meter Sub-Meter
APPLICATIONS
• Utility 3D Modelling
APPLICATIONS-CONT’D
• Utility Measurements– Pole Heights– Connection Heights– Cable Clearances– Cable Separations
8 m
Other Applications
• Pole Detection• Tree Detection• Shoulder profiling• Curb height measurements• Clearance measurements• Reflectivity measurements• Limitless possibilities……
Other Applications for Automation
Pave Application:
Viewing multiple perspectives of pavement segment and distresses
Other Applications
Wastewater Application:
Viewing above ground infrastructure impact with SEWER MAIN CCTV
Other Applications
Change Detection Application:
Compare change in area over time.
Other Applications
Simulation Application:
Placing CAD objects spatially on images for simulating sight barrier to power lines.
Other Applications
Aerial / Land perspective Application:
Viewing side by side Aerial Land images.
Applications Video Synchronization Temperal Comparisons
Early Winter Early Spring
Side by Side comparison shows that the billboard has changed and the house has been demolished
• TRANSPORTATION & MUNICIPALITIES:
• Inventory of infrastructures & assets
• Automatic road sign detection and inventory
• Safety equipment (guardrails, reflectors, etc.)
• Traffic & street lights
• Pavement lines, markings, etc.
DISTRIBUTION OF ELECTRICITY & TELECOMMUNICATIONS
• Geopositioning of poles
• Identification of plates such as IRD, etc.
• Equipment identification
• Etc.
Benefits
• Less costly and more efficient than traditional surveying methods– Reduces operational costs– Does not slow or impede traffic– No workers on the roadside
• Availability– Great Management Tool– Data is accessible throughout the year
• An integrated approach– Open, modular & portable hardware– Tightly coupled link to GIS– Parallax created through single camera (lower
cost)– User friendly & based on geo-referenced image
data• QA/QC & quality management
– Real time quality control during acquisition & extraction
– ISO 9001
Benefits
Why?
Office Analysis
Automation Comparison
QUESTIONS?
