How does viewshed analysis work
Viewshed analysis is a very unique method of analyzing data because it is heavily dependent on software and user experience to break up an image into manageable components. These specialized analyses include varied coloring of an image to represent areas where you may be missing some relevant data.
Once broken down, the viewshed analysis is similar to a geological map where higher elevations (usually building) are shaded in difficult colors to emphasize where views are obscured. Based on the coloring contrast, you need to be able to analyze what data you may be missing or how obscured views will affect your end results.
Multiple images are required using viewshed analysis because it is based on different angles of the same area so that all parts of the roads and infrastructure can be included in the analysis. These varied angles can supplement your main images where those same areas are obscured. However, these supplemental images tend to focus on a single area. You have to piece these images into the larger picture, but you can also complete a project without them through calculations and properly interpretation during the viewshed analysis.
This type of analysis is typically used for modeling and simulation, giving the user as accurate an overview of the traffic ebb and flow as possible. With years of experience to draw from, our image analysts can give you the insight and guidance you need to conduct a thorough viewshed analysis. We can help you understand how your current data and extrapolations from the obscured views work into the whole picture.
For analysis projects requiring video analysis, aerial photo analysis (such as counting or tracking cars on images), GIS data creation and traffic model database creation services contact us at Telegenisys. As an ISO certified operation we can assure you highly accurate superior results.