3D Modeling

[Andrew Mason]

I may be the last to know this. I just looked at Dealey Plaza in Google Earth Pro-with 3D Buildings layer. Elevation data is not only given for buildings but trees, plaza structures and even automobiles parked in the lots! Elevations for some details of the TUP are available. All elevation data are given with 1 foot resolution.

Elevation, Ft
426      Center of Houston St. / Main intersection
400      Elm just at the underpass
398      Elm just after the underpass
419-420   Top of bridge at track level
423      Rail
426      Top of East Elm/Main pillar

Very helpful.  On my 3D Sketchup model of DP I get 490 feet from the bottom SE corner of the TSBD to the middle of Elm at the entrance to the underpass. So the average slope is arcsin(26/490)=3.04 degrees.

[Jerry Organ]

The rubber tyre diameters don't match. My model shows tyres with a 27" diameter.  It may be that the rubber tyres are bigger. Need more information.

In 1963, the limousine received a set of "sunburst" wheel covers made for the 1957 Lincoln Premiere, that measure 15" across. The same diameter as the hubcaps in the SketchUp model. So at least the wheel covers are accurate.