Rubbersheeting and Digitizing
Role
You are working with the local historical preservation alliance and you have been assigned the task of using historical Sanborn maps to extract information about the downtown of Louisville KY and compare them with recent four band aerial imagery. A former intern has already digitized a portion of the city. Request approval for your area of choice from your instructor by sending the cross streets to be used and the Sanborn map number. At least six discrete classifications are required of the aerial imagery. The designer should draw conclusions about the classified area from the historical and recent data. The classification of the aerial image must use the near-infrared, red and green bands.
You are working with the local historical preservation alliance and you have been assigned the task of using historical Sanborn maps to extract information about the downtown of Louisville KY and compare them with recent four band aerial imagery. A former intern has already digitized a portion of the city. Request approval for your area of choice from your instructor by sending the cross streets to be used and the Sanborn map number. At least six discrete classifications are required of the aerial imagery. The designer should draw conclusions about the classified area from the historical and recent data. The classification of the aerial image must use the near-infrared, red and green bands.
Problem
There is an ongoing project with students digitizing historical Sanborn maps of Louisville KY from 1905. Project work, when appropriately completed, will be integrated into the existing 1905 Historical Mapping Project. Extra points beyond the course requirements will be awarded for those individuals whose data is integrated into the project.
There is an ongoing project with students digitizing historical Sanborn maps of Louisville KY from 1905. Project work, when appropriately completed, will be integrated into the existing 1905 Historical Mapping Project. Extra points beyond the course requirements will be awarded for those individuals whose data is integrated into the project.
Project Area:
West boundary – 14th St.
North boundary – Ohio River
South boundary – Kentucky St.
East boundary – Shelby St.
West boundary – 14th St.
North boundary – Ohio River
South boundary – Kentucky St.
East boundary – Shelby St.
Case Study Requirements
- Overview map of your region being analyzed
- Georeferencing
- Digitize – use the lesson document as an example
- Create new layers in a geodatabase
- Create domains
- Required layers and Attributes
- Streets (polygon)
- Name
- Width
- Buildings (polygon)
- Construction type
- Comments
- Water lines (polyline)
- Diameter in inches
- Parcels (polygon)
- Number
- Street
- Comments
- Blocks (polygon)
- Number
- Streets (polygon)
- Make sure snapping to vertexes is used
- Maps showing the aerial image and the raw Sanborn map
- Map showing the classification of the aerial image
- Map showing the digitization of the Sanborn map
- Report discussing the methods and the conclusions
Technical Skills
- Georeferencing
- Digitizing
- Snapping
- Map Package
- Symbology
- Publishing
- Clipping an image from a service
- Creating a signature file for classification
- Classification using a signature file
- Land area in acres for each classification
Resources
There are five volumes of information for the 1905 Sanborn maps. Only volumes 1 and 2 will be used in this project, since only the downtown region of the city is part of this project.
Data Source: Kentucky Digital Library
Volume: 1 http://kdl.kyvl.org/catalog/xt7rxw47qc79_14
Volume: 2 http://kdl.kyvl.org/catalog/xt7rxw47qc79_15
Completed Pages: 44, 51, 78 (outside study), 109, 110, 113, 114, 121, 122, 123, 124, 126, 139, 140, 141, and 142. These blocks have already been digitized and are not available for this assignment.
Process: Select a map, you will have to manually step through the maps until you find one you want to use and then download it as a PDF and convert it to an image format to use in ArcMap. IrfanView is the suggested conversion program, www.irfanview.com
Suggested blocks 52, 60, 74, 119, 120, 125
Inform your instructor on your selected map before beginning.
Four band aerial image service, such as can be obtained from the Kentucky GIS department
There are five volumes of information for the 1905 Sanborn maps. Only volumes 1 and 2 will be used in this project, since only the downtown region of the city is part of this project.
Data Source: Kentucky Digital Library
Volume: 1 http://kdl.kyvl.org/catalog/xt7rxw47qc79_14
Volume: 2 http://kdl.kyvl.org/catalog/xt7rxw47qc79_15
Completed Pages: 44, 51, 78 (outside study), 109, 110, 113, 114, 121, 122, 123, 124, 126, 139, 140, 141, and 142. These blocks have already been digitized and are not available for this assignment.
Process: Select a map, you will have to manually step through the maps until you find one you want to use and then download it as a PDF and convert it to an image format to use in ArcMap. IrfanView is the suggested conversion program, www.irfanview.com
Suggested blocks 52, 60, 74, 119, 120, 125
Inform your instructor on your selected map before beginning.
Four band aerial image service, such as can be obtained from the Kentucky GIS department