Category: 3D Modeling

1853 Richmond and its Slave Market

Crowe-Slaves_Waiting_for_Sale_-_Richmond,_Virginia

The video of 3D Richmond is finally up for your viewing pleasure. To learn more about the project visit the Visualizing the Past article. The video follows the route of English painter Eyre Crowe’s visit to the city in March 1853. He arrived along the the Fredericksburg and Potomac Railroad and stayed at the high-end American Hotel one block south of Capitol Square. On his first full day in the city, hoping to find “a possibly dramatic subject for pictoral illustration,” Crowe set out into Shockoe Bottom to witness several slave auctions. Crowe recorded what he saw there in his powerful painting Slaves Waiting for Sale

Over a hundred and fifty years later many seek to understand more about the slave trade. The sites where people were bought and sold in Richmond have been obliterated by twentieth-century development, many of them under an interstate. This video is meant to help viewers imagine what the built environment of mid-nineteenth-century Richmond looked like and recognize the significant physical footprint of slave trading in its commercial district.

capitol_composite

Image by Nathaniel Ayers

 

University of Richmond, 100 Years Ago

justin-lily

Lily Calaycay ’17 3D modeling North Court in Google Sketchup. Photo by Nate Ayers

Imagine what the University of Richmond’s campus was like over a 100 years ago. Chris Kemp, the head of the Discovery, Technology, and Publishing department in Boatwright Library and his team have been working on documenting the history of the college for its’ centennial. They have done a fantastic job archiving and sharing historical artifacts of the university’s past. The DSL has been assisting Chris’s group with georeferencing historical campus maps for an upcoming project, which gives a spatial timeline of the university’s history. Since we had fairly detailed maps of campus buildings, roads and topology, what better way to envision the campus 100 years ago than a physical 3D model?

 

The base for any 3D model is the elevation data. The elevation data came from a 1911 survey map that was georeferenced, then digitized using various tools in ArcGIS. The contour lines were in 25’ intervals and covered all of campus as we know it today. Since this map only had contour lines and no buildings, we had to use a 1925 campus master plan map to obtain building footprints and road lines. Some buildings were deleted to reflect campus around the same time as the 1911 survey. These digitized footprints were then used in Google SketchUp to model basic building features. Buildings were not highly detailed because of the accuracy of the printer. The contour lines were converted to a TIN (Triangulated Irregular Network) to create a surface. The problem with converting the contours to a TIN was that the contour intervals were so large it created an unrealistic surface in certain portions of campus– some hand smoothing was needed in SketchUp before the model was printed to mitigate this. After the contours were converted to a surface they were imported into ArcScene and exported as a VRML file so it could be imported into Sketchup.

Once the TIN surface was exported out of ArcScene, it was passed on to Fred Hagemeister–the Center for Teaching, Learning, and Technologies Research Analyst for 3D printing preparations. Once in SketchUp, the surface model was exaggerated 2x to highlight the topology of campus and given a graduated color ramp to show distinction between high and low elevations. Building footprints were added and the surface was ”graded” to better represent the buildings’ actual existence with the landscape. The buildings and roads were added and colored to add detail and the campus started to take shape. Buildings were colored red, if they still exist, and blue if they are no longer on campus. The final and probably the most daunting task was turning the surface from a sheet into a solid shell. Once a solid shell, it was then scaled down and sectioned into 12 pieces since the printer can only print an “8×8” piece. Below you will see the 3D printing process—from printing, to excavation, and finally, gluing.

Process

With the power of GIS and collaborations between Boatwright Memorial Library, the Center for Teaching, Learning, and Technologies, and the Digital Scholarship Lab we were able to take a paper survey map from 1911 and turn it into a physical 3D model.  Two maps over a decade apart were stripped down to their raw data and rebuilt together to show a glimpse of what the University of Richmond might have looked like over a century ago. Check out Chris’s Blog to learn more about the project.

 

 

DSC_5543

Chris Kemp placing a section of the 3D model. Model is made up of 12 individual sections. Photo by Angie White

DSC_5559

Model once all of the pieces are in place. Photo by Angie White

Visualizing the Past

Over the past several months, the DSL has been collaborating with the Library of Virginia, and Maurie McInnis, Vice Provost for Academic Affairs and Professor of art history at the University of Virginia on the To Be Sold– Virginia and the American Slave Trade exhibition. Read more about the exhibition below. Our role in the project was to create a 3D visualization of Richmond in the early 1850’s. The 3D visualization is used to help visitors envision Erye Crowe’s journey through Richmond, and experience the slave trade through his paintings and engravings. The models’ intent is not to replicate every detail of Richmond in 1853, but provide a sense of the architectural styles and atmosphere of the city at the time.  This has been a challenge considering the time period and lack of information on such a grand scale. The foundation of any 3D project is footprints, which are a little hard to come by in the 1850’s. We discovered a map made by F.W Beers in 1876 that detailed buildings, parks, and other features quite well. Below is one export from David Rumsey’s Map Collection. We also used these as the basemap for the model.

4623014

F.W Beers map of Richmond published in 1876. Export from David Rumsey’s Map Collection.

The problem with the Beer’s map is that it depicts Richmond 20 years later than decade of interest. To resolve this issue we referenced several maps of Richmond during the 1850’s and adjusted our footprints accordingly.  After georeferencing these images and digitizing the footprints, we started to think about modeling methods for a project like this. With the help of Maurie McInnis and Scott Nesbit, we gathered numerous photos showing buildings and detailed descriptions of material and architectural styles for the time period. We wanted to provide the greatest amount of detail without modeling 3,000+ buildings by hand. For buildings we had photos or descriptions for, our student interns modeled these using Google Sketchup. With the help of Nathaniel Ayers and I, the students modeled more than 30 buildings around Richmond for the 1850s. The students really enjoyed the project and got immersed in the details of the building they were modeling.

Even though the students modeled over 30 buildings we still had at least 3000 yet to model, with no real idea what the majority of them looked like. I’ve heard about CityEngine by ESRI for a while, but have never experimented with it. After reading about the Rome Reborn project I felt it was a perfect solution to our problem. In short, CityEngine uses a procedural modeling approach. By using rule files and GIS data, you can populate a large scale 3D model in a matter of moments.  Maurie helped us a great deal on this portion by providing detailed descriptions of facades and architectural styles found in Richmond at the time.  Both the Sketchup and CityEngine models were exported and brought into 3D Studio Max. Nathaniel Ayers did an outstanding job rendering the buildings, adding trees, and animating the video. Bringing everything into 3D Studio Max gave the model consistency since we used two different software’s to populate the buildings.

This project utilized a combination of modeling approaches, which served us well considering the time period and information available. Procedural modeling allows us to focus on the architectural details of a specific time/ place and apply these styles over a city—giving you a sense of what a city might have looked like during that time. Using this along with traditional/more detailed modeling approaches resulted in a stunning visualization showcasing the architectural features rather than specific building types, all without compromising the rest of the scene because of specific building descriptions.  To see the whole video click here or visit the To Be Sold exhibit at the Library of Virginia starting Monday, October 27, 2014—Saturday, May 30, 2015. Along with the exhibition we hope to present this work at the upcoming ESRI Users Conference this July.

Screen capture showing birds eye view of Richmond  Virginia in 1853.

Screen capture showing bird’s eye view of Richmond Virginia in 1853.

Screen capture showing the Capitol looking west.

Screen capture showing the Capitol looking west.

Birds eye view looking West over the city.

Bird’s eye view looking West over the city.

Screen capture of the American Hotel.

Screen capture of the American Hotel.

 

To Be Sold: Virginia and the American Slave Trade
Monday, October 27, 2014—Saturday, May 30, 2015
Time: 9:00 AM–5:00 PM
Place: Lobby and Exhibition Hall,  Free

This groundbreaking exhibition will explore the pivotal role that Richmond played in the domestic slave trade. Curated by University of Virginia professor Maurie McInnis, To Be Sold will draw from her recent book, Waiting to Be Sold: Abolitionist Art and the American Slave Trade, and be anchored by a series of paintings and engravings by Eyre Crowe, a British artist who witnessed the slave trade as he traveled across the United States in 1853. This internal trade accounted for the largest forced migration of people in the United States, moving as many as two million people from the Upper South to the Cotton South. Virginia was the largest mass exporter of enslaved people through the Richmond market, making the trade the most important economic activity in antebellum Virginia. This exhibition will not be merely a story of numbers and economic impact, but also one that focuses on individuals and the impact that the trade had on enslaved people.

%d bloggers like this: