Illinois Department of Transportation: Elgin O’Hare - West Bypass
Project completed as subconsultant to CH2M Hill
AeroMetric's expertise in both transportation solutions and airport mapping solutions was ideal for providing consultation to CH2M Hill and the Illinois Department of Transportation (IDOT) for this project. A study was undertaken to evaluate and identify comprehensive transportation system solutions for the Elgin O’Hare – West Bypass. The corridor has experienced long-standing traffic congestion and poor accessibility.
High accuracy Photogrammetric surveying based upon the Illinois Department of Transportation (IDOT) CADD mapping specifications was completed to support the engineering mapping associated with design and construction for the project.
Being one of the nation's busiest airports, AeroMetric worked closely with O'Hare's air traffic controllers to design primary and alternate flight plans that allowed conventional aerial imagery to be collected in a safe manner.
On the day that the atmospheric conditions were ideal for imagery collection, the final plan was approved by the Federal Aviation Administration (FAA) Chicago O’Hare Tower control personnel. The flights were completed without Airborne Global Positioning (AB/GPS) to allow for the least amount of time to be spent in the O’Hare airspace during acquisition of data. The imagery was used to support the creation of geospatial products for the study corridor.
AeroMetric supported a team of survey subconsultants with the identification of locations in excess of 300 target and photo-identifiable control point locations.
Softcopy aero-triangulation was used to evaluate photogrammetric control accuracy and extend control across all project photography. A softcopy aero-triangulation report based upon IDOT specifications was developed and delivered.
AeroMetric provided design-scale digital planimetric mapping, digital terrain models (DTMs), and contours to IDOT standards as specified in the Illinois Roadway CADD Drafting Specifications. We also delivered black and white digital orthophoto imagery with 0.25-foot pixel resolution, which conformed to ASPRS Class I horizontal accuracy standards. The final imagery data was delivered in .TIF, TIFW, and MrSID formats.
The project was completed under an accelerated delivery schedule to meet the demanding milestones delivery dates associated with the program.
