This copy is copyright protected.
Copyright © 2025 Geographicus Rare Antique Maps
Digital Image: 1872 Bonsall and Kellogg Map of Colorado w/ insets of Denver, Boulder, Central
Colorado-bonsall-1872_d
Title
Map of Colorado with Plans of its Principal Towns.
1872 (dated) 38.25 x 41.5 in (97.155 x 105.41 cm) 1 : 506880
1872 (dated) 38.25 x 41.5 in (97.155 x 105.41 cm) 1 : 506880
Description
FOR THE ORIGINAL ANTIQUE MAP, WITH HISTORICAL ANALYSIS, CLICK HERE.
Digital Map Information
Geographicus maintains an archive of high-resolution rare map scans. We scan our maps at 300 DPI or higher, with newer images being 600 DPI, (either TIFF or JPEG, depending on when the scan was done) which is most cases in suitable for enlargement and printing.
Delivery
Once you purchase our digital scan service, you will receive a download link via email - usually within seconds. Digital orders are delivered as ZIP files, an industry standard file compression protocol that any computer should be able to unpack. Some of our files are very large, and can take some time to download. Most files are saved into your computer's 'Downloads' folder. All delivery is electronic. No physical product is shipped.
Credit and Scope of Use
You can use your digial image any way you want! Our digital images are unrestricted by copyright and can be used, modified, and published freely. The textual description that accompanies the original antique map is not included in the sale of digital images and remains protected by copyright. That said, we put significant care and effort into scanning and editing these maps, and we’d appreciate a credit when possible. Should you wish to credit us, please use the following credit line:
Courtesy of Geographicus Rare Antique Maps (http://www.geographicus.com).
How Large Can I Print?
In general, at 300 DPI, you should at least be able to double the size of the actual image, more so with our 600 DPI images. So, if the original was 10 x 12 inches, you can print at 20 x 24 inches, without quality loss. If your display requirements can accommodate some loss in image quality, you can make it even larger. That being said, no quality of scan will allow you to blow up at 10 x 12 inch map to wall size without significant quality loss. For more information, it is best consult a printer or reprographics specialist.
Refunds
If the high resolution image you ordered is unavailable, we will fully refund your purchase. Otherwise, digital images scans are a service, not a tangible product, and cannot be returned or refunded once the download link is used.
Cartographer S
Joseph Hartshorne Bonsall (September 7, 1833 - April 9, 1876) was an American civil engineer and surveyor active in Philadelphia, Pennsylvania and later Denver, Colorado. Bonsall was born in Philadelphia, the son of Edward H. Bonsall (1794 - 1879), a well-respected citizen of that city and founder of the 'Philadelphia, Germantown and Norristown Railroad'. He worked the Philadelphia Survey Department, where along with Samuel Lightfoot Smedley (1832 - 1894), he prepared a large-scale map of Philadelphia. He relocated to Denver Colorado around 1869 where he worked as a surveyor with the Pacific Railroad. There, working with Edwin Hosmer Kellogg (1845 - 1927) he published several important maps of Colorado and Denver. Bonsall died of smallpox in 1876. More by this mapmaker...
Edwin Hosmer Kellogg (September 7, 1845 - November 18, 1927) was a civil engineer, surveyor, and map publisher active in Denver, Colorado in the second half of the 19th century. Kellogg was born in White Pigeon, Michigan, but he grew up in Ann Arbor. From 1862 - 1864, he studied from the University of Michigan, but is listed as a non-graduating alumni. He relocated to Denver, Colorado in 1865 to take work as the private secretary to Governor Alexander Cameron Hunt. When Hunt's term ended in 1869, Kellogg began to work privately. Around 1871, he began advertising himself in Denver directories as a civil engineer and surveyor. He appears in Denver directories from 1871 - 1875. During this time he released several important maps of Denver and Colorado in partnership with fellow surveyor Joseph Hartshorne Bonsall (1833 - 1876). Subsequently, he traveled extensively throughout the southwest, pioneering hydraulic engineering in Texas, New Mexico, and Idaho. He moved to San Bernardino, California in 1904 to work as chief engineer of the Arrowhead Reservoir and Power Company. Kellogg died in San Bernardino in 1927. Learn More...
References
OCLC 556809268. Yale University, Beinecke Library,
834 1872. Philips (America) page 232.