Nella Young Jan. 25, 2008
- URL: http://www.ornl.gov/sci/gist/
- Project Name: Rooftop Thermography Study
- Institution: Department of Energy facilities on the Oak Ridge Reservation
- Data Source: The data used was "Airborne thermal imagery, acquired with a Daedalus multispectral scanner during both daytime and predawn hours, subset for each building and rectified to a standard geographic coordinate system."
- Geographic extent of the study area: Oak Ridge Reservation
- Software and analytic methodology used (if given): ArcInfo was used for vector data.
- What was done during the study: For the rooftop thermography study, the researchers did visual inspection of the images to understand the various issues that would contribute to the decision to do maintenance or replacement of aging roofs. The purpose was to assess whether this kind of analysis was an effective tool for making these decisions. They mapped
- Results of the research: The tool of GIS combined with remotely sensed thermal data sets was round to be effective for use in analyzing the various reasons for rooftop repairs or replacement. The technique was subsequently used by all facilities on the Oak Ridge Reservation to determine the integrity of their roofs and to help contractors pinpoint where leaks are occurring.
The image shows bright spots indicating moisture - usually as a result of puddles of or saturated materials. ArcInfo was used so that vector polygons could be drawn around moisture areas and overlayed on engineering drawings, thermal imagery, or ortho-photographs.
1. Think about the issues or research questions addressed in the project, and why the spatial/geographic aspects in the project are significant (assuming they are). Could the project be accomplished without mapping or spatial analysis?
The project could be accomplished with much more difficulty, danger, and time, by sending people up on the roof for visual inspections, and could be also completed with regular photography, but both would be to less effect, because the thermography analysis takes into account issues that cannot be measured visually, such as moisture retention and insulation.
2. What further questions would you like to see explored in a project like this? Are these questions spatial or non-spatial? Explain.
I would want to see a database incorporated that includes non-spatial information tracking the age of the roof, the work that has been done on it, the materials used, and other issues that could be helpful in guiding the decisions for maintenance as a result of the cues from the thermography analysis.