Figures and Tables:
- Example Sanborn
Tables - Attribute Fields
- Index Map
- Street Compromise
- Sanborn Error
Fig.5 - Georefrence
- Thematic Map
Fig.7 - Photo
The Final Class Project brings together most of the concepts and software
techniques learned during previous projects while simulating a realistic
proposal / pilot project effort. A group effort was encouraged
so we assembled a volunteer team dubbed the "SketchTools" by the instructor.
All four of us dig dirt professionally but from a different perspective.
The four SketchTools include; an archeologist, a geologist, a
geoenvironmental (civil) engineer, and a soil scientist.|
class projects, semi-complete "cook book" instructions were not provided.
Instead, only goals and hints were provided to encourage a student lead
project specific GIS design and implementation. Questions were
encouraged and the class message board was well utilized. Weekly
submittals were required to make sure that each group remains "on target".
The final project is based on
historical maps of
Charlottesville, Virginia copyrighted by the Sanborn Map
Company in 1920.
According to the lesson background section:
From the late 19th century through the 1990s, the Sanborn Map
Company authored what are arguably the most information-rich
maps of urban America. The original intent of the maps was to
provide a risk assessment tool to the fire insurance industry.
They have come to be an important resource in all kinds of
research settings, including urban geography, architectural
history and preservation, urban planning, ethnic studies, urban
archaeology, genealogy, and many others.
Figure 1: Example Sanborn Map (1920_03a)
Because of their intended purpose, the most detailed aspect
of the maps are the buildings. Looking at a Sanborn map, one can
find information on construction materials, number of stories,
entry-ways, ownership, street address, general (residential,
commercial, public) as well as specific building type (office,
warehouse, garage), and sometimes the date of construction.
Other kinds of information that can be gleaned from the maps
include street names and widths, land elevations, utility lines,
parks and railroad tracks.
The final project premise states that the
Albemarle County Historical Society (ACHS)
located in Charlottesville Virginia intends to create GIS data layers from
20th century Sanborn maps to aid in land use change studies, genealogy, and
visualization of their city. A proposal has been requested for a GIS that
includes layers depicting 10-year intervals from 1900 through 1990.
This final class project has our group of four "GIS practitioners" competing for the
large contract by designing and implementing a pilot GIS project based on
just two Sanborn maps (supplied in four scanned images: 120_02a.jpg &120_02b.jpg,
plus 120_03a.jpg & 120_03a.jpg.) Thirty scanned map images were
supplied so no two students were assigned the same image. Note:
According to the map index, the city population was 15,000 in 1920.
According to the US Census, the population had grown to 45,049 in