Parr Excellence staff have been producing as-built documentation and monitoring project sites for over two decades. Our experience typically involved documenting site conditions before and after construction, and monitoring sites by establishing photo points to document conditions with paired photos over time. As-built documentation was usually performed by transforming construction notes and sketches into computer software (AutoCAD) to develop as-built drawings. More recently, we realized that aerial photographs taken from an Unmanned Aerial Vehicle (UAV) are a much more reliable method of documentation than a field sketch. We recognized that UAV photos provide a relative scale that objectively documents field conditions. We soon began to include aerial photo inserts into plan view as-built drawing details to provide additional information that cannot be imparted from a two-dimensional line drawing. This method of documentation becomes even more powerful when applied to site monitoring with multiple flights over time.
At Parr Excellence we recognize that new technology is transforming the restoration industry. Our Light Detection And Ranging (LiDAR) capability provide a survey-grade three-dimensional point cloud to document site conditions. We understand how to couple imagery with lidar scanned data, and we push the limits of this application to produce three-dimensional imagery above and below tree canopies.
We recognize that there are more uses of these data than we can currently identify and that the breadth and depth of data collected are so rich that infants today will likely find more creative ways to use it to benefit future ecosystems. The power of such data is leveraged to monitor and measure change with the repeated collection over time. With such repetitive data collection, we can begin to answer questions like:
- How much material has been accreted or eroded over time?
- How have the size gradations of substrate changed over time?
- Have pools filled in overtime?
- Has large wood moved?
- What is percent survival of planted vegetation?
- Are invasive species impacting the site?
- What are the time scales of channel migration?