Project

Title
North Carolina Historic Topographic Maps Scanning and Georeferencing Project  
Geographic Area
North Carolina; maps partially extend into bordering states of Virginia, Tennessee, Georgia, South Carolina  
Organization
NCSU Libraries  

Descriptive Information

Url
http://www.lib.ncsu.edu/gis/historictopos.html  
Status
Ongoing  
Publisher
United States Geologic Survey  
Metadata Compiled
Yes  
Metadata Format
 
Num Items
185  
Scale
1:250,000, 1:62,500 mostly  
Years
1891 - 1969
Description
The NCSU Libraries has compiled an extensive collection of historical topographic map images of North Carolina that can be downloaded for free from the Web site http://www.lib.ncsu.edu/gis/historictopos.html. The collection contains superseded US Geological Survey and US Army topographic maps, with dates ranging from 1891 to the 1960s. Over one-third of the maps were published prior to World War II and are known as "15-minute maps" because they cover 15 minutes of latitude and longitude. Many of the printed originals are maintained in a collection by the North Carolina Geological Survey (NCGS). Others were loaned by the UNC Maps Collection for scanning. The digital collection is composed of both georeferenced JPEG 2000 format images and lossless (unaltered) non-georeferenced JPEG 2000 images. JPEG 2000 is a relatively new, yet widely supported image format that offers superior compression performance. The georeferenced images may be used in GIS software to provide a historical basemap when overlaid with other current spatial data to identify changes in landscape features. The lossless images, when plotted, appear nearly identical to the original scanned map. To find the map image you would like to view, you can scroll the list online and pick from the map sheet names. Alternatively, you can use the index shapefiles or Google Earth KML index files to identify the maps that cover your area of interest.  

Technical Information

Download Available
Yes  
File Format (Original Scan)
TIFF  
File Format (Display)
JPEG 2000  
Resolution
300 ppi  
Compression Ratio
None and 20:1  
Image Management Software
GeoExpress 6.1  
Geo Referenced
Yes  
Rectified
Yes  
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Contact Information

Organization
NCSU Libraries  
Name
Jeff Essic  
E-Mail
jeff_essic@ncsu.edu  
Phone
919-515-5698