“As we waited for the weather to clear, our crews began planning their flight lines. During this process, we made a decision that proved critical to the success of the project. We put word out to the Missouri GIS Advisory Committee (MGISAC) listserv about our plans and asked if anyone had a map of the tornado path. The response was remarkable. Within minutes, the Missouri National Guard and the State Emergency Management Agency (SEMA), both with boots on the ground, delivered remarkably detailed shapefiles delineating the path of destruction…

Working with a combination of Z/I Imaging DMC processing software and our own proprietary systems, the production team orthorectified the one-foot images first using the natural color bands and existing elevation data. Once the 40 one-foot exposures had been orthorectified, they were used to filter out some of the three-inch exposures that contained no damage as a means of expediting the remaining processing.”

Why should you read this? Weather events keep happening, and surveyors are often first responders, at least in terms of infrastructure. This is a good case study on rapidly gathered aerial data used to assess damage and plan reconstruction. Professional Surveyor, 2012