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CREATE Program:Technology and Mapping
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Topics
• LIDAR Technology• Mapping Products• Uses of LIDAR Technology and Mapping
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CREATE Program
ProjectTeam
• HNTB– Project Manager– Data Management – Ground Control– Survey– Right-of-way boundaries– Data Conversion– QA/QC
• John Chance Land Surveys– Data Acquisition– Orthophotography
• Optram– Data Extraction
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LIDAR Technology
•Light Intensity Detection And Ranging
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LIDAR Technology
• Cost-25% of cost of traditional surveying methods• Speed – All Projects and Corridors “flown” and
initial projects complete within a year• Cutting Edge – LIDAR Accuracy and Density• “Extras”
– Integration of GIS and Engineering Systems– Aerial Photos and Videos
• Raw LIDAR available for future extraction• Mapping products are more accurate, timely and
cost-effective than comparable photogrammetricprocedures.
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LIDAR Technology
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LIDAR Mapping Process
• Flight Planning• Data Acquisition• Data Extraction• Ground Control• Quality Assurance
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Flight Planning
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Flight Planning
• CREATE Program – most extensive area mapped using LIDAR
• Coordination • Flight lines• Develop Best Practices• ‘War room’ to debrief and plan for the next day
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Data Extraction
• Extraction with Flip 7 Software• Millions of data points
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Data Extraction
• Flip 7 - 3D view with raw LIDAR data
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Data Extraction
• Width of LIDAR swath is determined by height of helicopter
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Data Extraction - Shapefile
• Shapefiles are extracted for use with ESRI’s ArcGIS software
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Data Extraction - Shapefile
• Planimetric data overlaid aerial imagery
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Data Extraction - Shapefile
• Property boundaries are digitized from different sources
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Data Conversion
• Shapefiles are converted to Microstation /J (v7) using FME
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Data Conversion
• Microstation /J (v7) IDOT CADD Compliant Drawing– Every feature is mapped to a specific level/color/linestyle
according to standards established by IDOT
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Track Geometry
• Track Geometry
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Mosaic Images
• Mosaic Images created from photos taken every second during flight– Produced at ¼-foot pixel resolution
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Surface Model
CULVERT
RETAINING WALL
• Accurate for Phase 1/Preliminary Engineering
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Contours
• Contours are created from the Surface Model
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Final Deliverables
•LIDAR Data•Video•Digital Photos•Orthophoto Mosaics•Shapefiles (GIS)•CAD Files (ENGINEERING)•Track Geometry•Ground Control•Metadata (HTML, XML)
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Using LIDAR and
Mapping
•Security Assessment– Determine areas of risk
•Feature Extraction– Planimetric Data– Location of features
•Planning– Mapping for future expansion plans– Infrastructure
•Easily integrate other spatial sources•Impact Analysis
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Visualization
• Allows for analysis
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Questions