Virtual Surveyor has added cut-and-fill mapping capabilities to Version 7.0 of its popular drone surveying package. The new functionality enables users to perform volume difference calculations in minutes and generate cut-and-fill maps from drone images captured on two or more different dates. The entire workflow of cleaning the surface models and subtracting one from the other is accomplished in Virtual Surveyor without exporting data to another application.
The enhanced cut-and-fill functions are part of a new feature called Terrain States. This allows the user to create separate Terrain States for surface models generated from UAV images captured over the same area on different dates. The user can delineate and delete objects, such as bulldozers or excavators that appear in a single surface model. These changes are saved in only one Terrain State so they do not cause volume measurement errors when one surface model is subtracted from another.
Contractors on large construction projects can use drone imagery and Virtual Surveyor on a regular basis to map the progress of their earthworks excavations, ensuring the volume of dirt added or cut meets the design specifications. Virtual Surveyor 7.0 even allows users to model proposed cut-and-fill design plans to compare the costs of various earth moving scenarios.
The Virtual Surveyor package enables professional surveyors to generate accurate topographic end products from drone data five times faster than traditional field work, bridging the gap between UAV photogrammetric processing software, and engineering design packages.
The suite takes the orthophotos and digital surface models (DSM) extracted from UAV imagery with photogrammetric software and generates an interactive virtual environment onscreen where surveyors can select the survey points and breaklines that define topography.