Tag Archives: architecture

Overlapping Photogrammetric systems

View of Point Cloud from side/rear

Spending a lot of time seeing how different photogrammetric systems and point cloud software packages speak to one another. sometimes the interface is elegant, sometime not so much…

Orthophotos from a Dense Point Cloud

45 degrees

45 degrees

RCP

RCP

on axis

on axis

45 degrees

45 degrees

on axis

on axis

Luzerne County Courthouse

Luzerne County Courthouse

Virginia Wines, Thomas Jefferson, Architecture…

Here is a link to a nice blog post about Barboursville: Wine, Thomas Jefferson, Architecture… what more could you want for a weekend excursion in Virginia? Thank you to the writer, Elaine C. Jean, for featuring one of my photos of the ruins taken from the air.

 

Saline Royal – Claude-Nicolas Ledoux

Aerial view of Ledoux's Royal Saltworks

This set of buildings located in Arcs-et-Senans (Franche-Comte) is incredibly interesting to anyone with an interest in Thomas Jefferson and/or enlightenment age architecture – notably so since it was not only constructed at the time it was built but is restored and available to the public.

Maison du Directeur (2010)

A lot of information on the Royal Saltworks is available both here and here. Ledoux’s influence on Jefferson is well documented and in evidence in most of his projects.  On Jefferson’s Academical Village at the University of Virginia, Ledoux is even “quoted” in one pavilion.  But the greater feeling one gets when visiting Ledoux’s Royal Saltworks in Arcs-et-Senans (also a UNESCO World Heritage Site) is the unmistakable kindred spirit between these two architects – their mutual conviction that philosophy and architecture share a link greater than building and commerce.

Point Cloud of the Maison Du Directeur

point cloud "elevation" (perspective removed)

a link to a panoramic view from the “Maison du Directeur” (looking outward) can be found here.

rectified photo of the Maison du Directeur

As can be seen in the drawing below, the full design was never fully realized. The “gabelle” or salt tax, was rather unpopular during the time of the French Revolution -making the entire idea of an “ideal city” rather remote.

Saline Royale, Claude-Nicolas Ledoux

Point Cloud Scan of L’Arc de Triomphe

L'Arc de Triomphe - Paris

I shot a series of photos around the Etoile at the center of which stands this grand monument.  It is incredible how busy the traffic is here at all hours, both vehicular and pedestrian! Anyway, from this series I was able to generate a point cloud to describe this massive arch at the head of the Champs Elysee. I then scaled the entire affair based on measurements taken from Google Earth.

Point Cloud Scan of Elevation

I also shot the ‘undercarriage’ of the monument to create a point cloud describing the vaulted surfaces there using photogrammetry. The point cloud itself is dense enough to create a sort of drawing. The location of any additional points – or edges etc. – can then be easily (an accurately) queried directly from the photographs.

Photos of the surfaces underneat

Point Cloud of surfaces underneath

Reflected Ceiling Plan of the Arch's central bay (point cloud)

287 Broadway

Building at Broadway & Reade Street in Manhattan

“Prominently situated on a comer site, the 287 Broadway Building is notable for its combination of the ltalianate and French Second Empire styles as executed in cast iron, and one of the few surviving examples in New York City.” – From the 1987 NYCLPC Landmark Designation Report

Construction of a new building to the south of 287 Broadway has caused this historic structure to fail.  I was asked to prepare rectified photography and a point cloud file/drawing that will at once capture the existing conditions and composition of the cast iron facades – and to provide some precise measurements as to how severly the building is leaning and in what manner.

Reade Street Elevation

Broadway Elevation

Two elevations of 287 Broadway

Point identities (that correspond to a "smart" point cloud) are noted on the Photographs

Childs Restaurant -2

Sheet 1 with rectified images "thawed"

Sheet 2 with rectified images "frozen"

Childs Restaurant

Sheet 3 with some rectified images "thawed", others "frozen"

Federal Triangle

USC/CW/ICC Modernization 1994

The Arthur Mellon Auditorium (ICC Building) 1994

Here is a composite drawing of the first really huge (HUGE) building that i used photogrammetry to measure and draw back in 1994.  This work was completed with Ben Frombgen at IAT when we were based in New Haven, CT. We did a complete set of elevations, eleven building profiles (that were later turned into building sections by our client, RTKL) plus a window schedule. It hurts for me to remember how little we charged for this work!  But it was one of our first big commissions and it seemed like a lot at the time.

This is also the first project on which I used a laser measuring device.  If I recall correctly, we were asked to deliver this project in metric units.  I remember being thrilled that the Leica Disto that we bought back then (which was as big as a large box of spaghetti) could switch between units.

I remember also that we had access to a great set of San Francisco based architect Arthur Brown Jr.’s original design drawings (from the 30’s) that were just stunningly beautiful and provided such a contrast to the general level of quality in CAD drafting at the time. Not only was the quality of drafting so great (a beautiful hierarchy of line weights, crisp fluid clarity of description) but the organization of the drawing set was so intelligent and efficient.  We resolved to find a way to draw as well with a computer and have been trying to do so since!

Arthur Brown Jr. also designed the san Francisco City Hall and Coit Tower.

The Cosmos Club Ballroom

Ballroom at the Cosmo Club

Here is a new project that I shot last week: documentation of the existing conditions of the interior surfaces in the ballroom at the Cosmos Club in Washington DC (formerly the Townsend Mansion). This is going to be a great opportunity to show what the photo + measured line drawing approach to documentation can yield (with a limited budget).

Malcolm X Park aka Meridian Hill Park

Meridian Hill Park

Meridian Hill Park

I just completed this project today, which was somewhat unique in its large footprint. The task was to make drawings of the perimeter wall around the entirety of Meridian Hill Park in Washington, DC.  Below is a satellite image showing the size of the park relative to its neighborhood.

Meridian Hill Park

Meridian Hill Park

I prepared drawings at eighth scale and organized them onto seven sheets.  This model required well over a hundred photographs. Below are a few sheets showing the linework.

Meridian Hill Park Perimeter Wall-1

Meridian Hill Park Perimeter Wall-2

Meridian Hill Park Perimeter Wall-3

Meridian Hill Park Perimeter Wall-4

Meridian Hill Park Perimeter Wall-6