I have been neglecting updates on my website, even though I’ve been doing some interesting work!
2016 has been extremely busy with large projects at the Biltmore in Asheville, NC and in San Antonio, TX (above). I’ve also had a chance to do some design work for two restaurant installations here in Virginia – “The Store” and “Chicano Boy”.
Plus I had a nice show of photographs of Portsmouth Island, NC that has been hanging in Ocracoke all summer.
That’s all for now – just wanted to post something 😉
Bob White Bridge
Measured Drawings of Bridge Exterior
Last summer I was hired by Frazier Associates in Staunton to prepare some as found documentation of the Bob White Covered Bridge in Patrick County, Virginia for preservation work to be conducted through VDOT. I learned yesterday that bridge was washed away in flash flooding! This is horrible to learn; now only seven covered bridges remain statewide, I believe.
I am therefore VERY glad to have a couple hundred photos of the structure suitable for photogrammetric rectification. I did prepare some simple drawings and orthophotography, small versions of which I’ll share here. I’ll also share some video snap shots of the point cloud I created.
I hope to get in touch with anyone who might be interested in rebuilding. If you stumble upon this page and share my interest please contact me!
Measured Drawings of Bridge in Plan
Below is a view of the point cloud using the free viewer distributed by Autodesk: RECAP.
Overview of point cloud
and a few videos of the orthophotography:
When I am hired to prepare a set of documents to describe the existing conditions of buildings I sometimes try to incorporate older drawings and the like. If I am working with original construction drawings it can be very interesting to see how and where the existing structure is different than the one designed. If I am working with measured drawings of unknown provenance it can be very frustrating to see how inaccurate the drawings are! So as a rule, I only deliver measured drawings that I create from my original site work since its the only way I know that I can really trust the work and stand behind it.
Realizing how valuable a good set of measured drawings truly is, it is wonderful to consider what a treasure our HABS HAER collections are! These are uniformly drawn to standards generally higher than the profession gets by on, even today. Sometimes I am looking at doing some work on a project and I am fortunate to learn that a HABS set of drawings already exist. This gives me an opportunity to overlay some of my work (with photogrammetrically derived images) onto this “layer” of information in seamless fashion.
I’ve long done this kind of work with rectified photography in a sort of manual approach. I’m discovering that its equally great to “Hybridize” the HABS line drawings with orthophotography as well (derived from 3-D models derived from a scanning process). The images posted here show a recent look at the Cape Hatteras lighthouse on North Carolina’s Outer Banks. The HABS collection of drawings is very nicely done and available to all to explore through the HABS web site (here). The images posted here show how the line drawings can be built upon with technology available today, They become the foundational layer of a living document that describes an important piece of architecture in great detail.