Bethlehem Steel Blast Furnaces

Blast Furnace Point Cloud

Blast Furnace Point Cloud

This is certainly the most complicated structure (series of structures) I have ever been charged with measuring and drawing. And it is BIG! I had to approach it globally as one giant cloud to create a set of master control points from which I could extract smaller set of local control points for higher resolution point clouds reflecting sub sets of the whole. Then I could create these and add them back to the whole.

Key Plan diagram

Key Plan diagram

Measuring and drawing a cramped attic space

Plan drawing with framing

Plan drawing with framing

Just quickly sharing a recent project snap shot showing the versatility of the field work techniques we’ve developed over the years. These are two screen grabs from a set of drawings being prepared as underlay information for a new design in an attic space that is difficult (and uncomfortable) to measure and draw. These line drawings were prepared from a series of photographs that had been modeled into a 3-D point cloud from which RGB forthophotographs were extracted to help enrich the line work.

Orthophoto/elevation/section drawing

Orthophoto/elevation/section drawing

Jackson Square – Vieux Carré – New Orleans

Orthophoto of the Cabildo - St. Louis Cathedral - Presbetère facing Jackson Square

Orthophoto of the Cabildo – St. Louis Cathedral – Presbetère facing Jackson Square

Neglecting the website/blog has gone on too long. I’ve been doing a lot of work since last fall but none of it has made it onto this page! So, just to break the ice, so to speak, I decided to grab share an orthophoto from a favorite place to many.

This orthophoto was composed of infrared shots of this famous trio of buildings in the heart of New Orleans. I grabbed these when I was visiting the city and looking at the possibility of creating a high res (both spatial and temporal) 3D model of the entire French Quarter for use as a planning and preservation tool.

Anyway, stay tuned and I’ll try to share some of the recent work soon.

Detail

Detail

Virginia School for the Deaf and Blind in Staunton, VA

Sample Orthophoto of Region 7 ( greatly reduced)

Sample Orthophoto of Region 7.1 ( greatly reduced)

In summer 2015 I collaborated with the team of architects and engineers studying Main Hall at VSDB. Another company was used for laser scanning in order to prepare floor plans of the building and adequate line drawings for the elevations. I was asked to prepare orthophotos describing the masonry surfaces of the building’s exterior to establish  detailed overview of the the various “as found” conditions this historic structure.

Some of the areas were challenging to access visually. The sample above is taken from a rather narrow courtyard or light well. It is a composite formed from dozens of close up shots collected from available photo stations.

Key Plan to regions for orthophotography

Key Plan to regions for orthophotography

Measured Drawings for Charlottesville, VA Residence

Another quick post for a project from summer 2015. I prepared these measured drawings to serve as the basis for designing some changes to accommodate changes in usage of the building.

Whenever a building has a complex roof structure with lots of dormers I am especially thankful for the tool of photogrammetry which helps both augment quality AND keep the project on budget.

Floor Plans

Floor Plans

Exterior Elevations

Exterior Elevations

Building Sections

Building Sections

Measuring and drawing an historic house in New Haven, CT

Attic plan drawn from orthophography

Field work: attic plan (sketch) drawn from orthophography

Recently completed project delineating building envelope for a house thought to be beyond repair. Locally known as a “zombie house” – but no more… Here are the orthophotos overlaid atop measured elevation drawings:

500central elevations 4

500central elevations 3

500central elevations 2

500central elevations 1

Bob White Covered Bridge

Bob White Bridge

Bob White Bridge

Measured Drawings of Bridge Exterior

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

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

Overview of point cloud

and a few videos of the orthophotography:

Slave Quarters at Clermont Farm

Orthophotography of Log Structure with additions

Orthophotography of Log Structure with additions

Here are two snapshots from some of the orthophotography prepared this summer in an effort to retain access to the historical information embedded in this log structure once it is covered with new cladding and gets a new roof as a part of preservation plan implemented with HistoriCorps.

More information about the project can be found here.

Side View of Structure, as found orthophotography

Side View of Structure, as found orthophotography

First Unitarian Church of Philadelphia

Partial Facade - Frank Furness 1886

Partial Facade – Frank Furness 1886

The First Unitarian Church of Philadelphia was designed by Frank Furness in 1886 in Philadelphia, PA. It has a neighboring building directly adjacent to the west and an open alley to the east. This has caused an asymmetrical load on the building’s trusses and has caused the facade at the alley way to bulge out over the years. I was hired to make a drawing of the affected elevation and to make a series of point measurements to gauge the status of the deformation as it is today.

In order to do this work I used a variety of software (for photogrammetry, point cloud creation, point measurement) and hardware (cameras, telescoping tripods, and laser levels, targets). The image above is seen “through the branches” (there is substantial tree cover on the side of the building).

almost full scale crop

almost full scale crop

crop showing "tree noise"

crop showing “tree noise”

My report

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Craft Morristown 2015

Post Cards for Craft Morristown 2015

It’s great to see my photo of some glass art by Soloman Solutions used for the Craft Morristown 2015 show.

Thanks to Artrider Productions for including the photo attribution on the postcards!