Hi all,
I work for a geospatial surveying company in Ireland, using Reality Capture to merge Laser scan data with Terrestrial and UAV photogrammetry datasets for the production of orthophotos to be used for CAD drawings.
Currently, we import the laser and image data, with texturing disabled for laser data. the idea is that using the laser scan data to create the mesh will give spatially more accurate results, and the images give the visual authenticity. The results can be mixed, its not always a smooth process and requires significant tinkering with the settings to get it right, many hours wasted. Often times the mesh looks great, but the texturing can be blurred in places, even after checking data quality and adjusting settings.
Previously I have used Pix4d, using a GPS to create GCP’s and then ‘pointing’ to them and using drone images to create the model and resultant Orthophotos (mostly for topographic orthos of large areas)
My question is this: Can GCP’s be used with images to create a survey grade, accurate 3d of built structures (for example a dilapidated castle), thus cutting out the need for laser scanning and saving many hours of scanning and processing. How does this compare with the laser scanning and photoG combined option?
In other words, can we use GCP’s and photoG to attain highly detailed, survey grade outputs of structures? or do we always need to laser scan to get the results we need?
With thanks,