PE and RS PUBLIC December 2011 : Page-1187
distributed and put into use in support of damage assessment and recovery planning. On September 9, following Tropical Storm Lee, a second multispectral acquisition was performed for the DHSES covering the City of Binghamton, New York, which was experiencing widespread flooding. This georeferenced and mosaiced imagery was again promptly posted, distributed, and put to recovery work. The aerial data from both the Schoharie Creek and Binghamton post-storm acquisitions continues to be in wide use. One user of the Schoharie Creek aerial lidar survey data was the New York State Department of Transportation (NYS DOT) Photogrammetry Section Design Services Bureau. Of particular concern to the DOT was the impact of several locks (Nos. 8, 9, 10, 11, 12) on the Mohawk River to nearby New York State roadways. The high river waters breached the locks and flooded and/ or threatened the ground stability of sections of the roadways. The DOT needed to perform immediate and follow up photogrammetric analysis of the lock and road areas in support of remedial engineering and construction. The DOT found that Lock No. 12 was suitably covered by Kucera's August 30 Schoharie Creek lidar survey and proceeded to acquire and use the bare earth return. An aerial survey of Locks 8-11 was authorized under Governor Cuomo’s Executive Order 19 on the evening of September 16. The emergency flyover was performed the next morning, Saturday, September 17, right after completion of control target placement. Data posting began the following Monday and had to be completed within the week to support the DOT's emergency response. The requirements for the Locks 8-11 aerial survey were georeferenced bare earth lidar return at 1'-2' spacing and photogrammetric-grade stereo frame aerial photography taken from a flight altitude of 1700' above ground. The dual sensor port twin-engine aircraft platform and close coordination with the DOT permitted the emergency flyover to be accomplished cost-and time-effectively in a single mobilization, in this case using the Leica ALS70 aerial lidar system for the lidar data capture and a Vexcel UCX large format digital frame camera for the photo image capture. The two resulting high resolution datasets (lidar and photo imagery) provided optimal detail for the DOT's subsequent photogrammetric mapping and modeling work. The DOT was encouraged by the level of ground detail provided by the lidar survey for vegetated areas. A follow-up emergency aerial survey of Lock 9 was authorized on October 14 and performed on October 16, allowing for DOT's photogrammetric analysis supporting bids for remedial earthwork for a portion of Route 5. A leaf-off condition follow up survey of Locks 8-11 is planned to obtain more ground information in vegetated areas and to evaluate changes in ground conditions and remedial work progress. The work described demonstrates some of the considerations and applications for emergency/disaster response aerial remote sensing. As more responders, planners, and other involved parties become aware of current capabilities, it is hoped that remote sensing can be better prioritized and utilized for the benefit of those most affected by disasters. reconstruction progress for NYS Route 5 bridge failure at produced from ALS70 aerial lidar return and Vexcel UCX NYS DOT (image courtesy of NYS DOT Photogrammetry Author John Antalovich Jr, PE, PS, President Kucera International Inc. email@example.com, www.kucerainternational.com "Aerial remote sensing can provide valuable data for responders to such disasters, although it is a support service susceptible to being overlooked..."
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