Disclaimer
Last Updated: April 1, 2026
The information provided on the Earliest Chicago Maps website at www.earliestchicagomaps.com and through our services is offered for general informational and educational purposes. While we strive for accuracy and thoroughness in everything we publish and produce, we ask that you read the following disclaimers carefully before relying on any information, tool, service, or product offered by Earliest Chicago Maps.
General Information
The content on our website, including blog articles, map descriptions, historical narratives, tool outputs, and service descriptions, is intended to provide general information about historical Chicago cartography and the services we offer. This content does not constitute professional advice of any kind, including but not limited to financial, legal, insurance, or investment advice. We make every reasonable effort to ensure the accuracy of the information presented, but we do not guarantee that all content is complete, current, or free from error. You should not act or refrain from acting based solely on information obtained from our website without seeking independent professional counsel where appropriate.
Map Valuation Disclaimers
Our Map Value Estimator tool is provided as a free educational resource to help users develop a general understanding of the factors that influence the value of historical maps. The estimates produced by this tool are algorithmic approximations based on publicly available auction records, market trend data, and general cartographic valuation principles. They are intended solely for informational and educational purposes.
The Map Value Estimator does not constitute a professional appraisal, and the values it produces should not be used for insurance coverage decisions, estate planning, tax reporting, charitable donation deductions, legal proceedings, or any transaction involving the purchase or sale of antique maps. The actual market value of any historical map depends on numerous factors that cannot be fully assessed through an online tool, including the physical condition of the document, the quality and completeness of its provenance chain, current market demand for the specific cartographer or region depicted, the rarity of the particular edition or state, and the presence of any repairs, restorations, or alterations.
If you require an accurate valuation of a historical map for any purpose, we strongly recommend engaging our professional authentication and appraisal services or consulting with a qualified independent appraiser. Our formal written appraisals involve hands-on examination of the physical document and are prepared by experienced cartographic specialists.
Historical Accuracy
Earliest Chicago Maps is dedicated to presenting historically accurate information about Chicago's cartographic heritage. Our team of cartographic historians conducts extensive research using primary sources, institutional archives, academic publications, and direct examination of original documents. However, historical records are inherently imperfect. Source documents may contain errors introduced by the original cartographers, surveyors, or publishers. Archival records may be incomplete, contradictory, or subject to differing scholarly interpretations.
The historical narratives, dates, attributions, and contextual information presented on our website and in our blog articles represent our best understanding based on available evidence. We acknowledge that ongoing scholarly research may reveal new information that revises previously accepted historical interpretations. Where significant scholarly debate exists regarding a historical claim, we endeavor to note the existence of differing viewpoints. We welcome corrections and additional information from researchers, historians, and the public, and we are committed to updating our content when credible new evidence warrants revision.
Information presented through our Chicago Timeline Explorer is compiled from a variety of historical sources and is intended to provide a general overview of Chicago's development. It should not be cited as a primary source for academic research without independent verification.
Reproduction Quality
Our reproduction prints are produced using high-resolution scanning and archival giclée printing technology on acid-free cotton rag paper. We employ meticulous color calibration processes to match the appearance of the original documents as closely as modern printing technology allows. However, reproductions are not originals, and certain differences between a reproduction and its source document are unavoidable.
Variations may exist in color rendering due to differences between the spectral characteristics of historical inks and pigments and those of modern giclée inks. The texture and weight of archival cotton rag paper, while chosen for its longevity and aesthetic quality, differ from the papers used in the original documents, which may include laid paper, wove paper, vellum, or other historical substrates. Fine details such as plate marks from intaglio printing, embossed cartouches, and the tactile quality of hand-coloring cannot be replicated in a giclée reproduction.
Our reproduction prints are clearly identified as reproductions and are not intended to be mistaken for original documents. They are produced for decorative, educational, and reference purposes. The dimensions of our reproductions may differ from the original documents, particularly when customers request custom sizing through our Print Size Calculator. Colors displayed on your computer monitor or mobile device may also differ from the final printed product due to variations in screen calibration and display technology.
Investment Advice
Nothing on our website or in our communications should be construed as investment advice. While historical maps can appreciate in value over time, map collecting, like any collecting pursuit, carries inherent financial risks. The market for antique maps is influenced by factors including economic conditions, collector trends, institutional acquisition patterns, and the availability of comparable items at auction. Past performance of the antique map market is not indicative of future results.
We do not recommend purchasing historical maps, reproduction prints, or any related products or services as financial investments. Decisions to acquire antique maps should be based on personal interest, aesthetic preference, and intellectual curiosity rather than expectations of financial return. If you are considering significant expenditures on antique maps, we recommend consulting with a qualified financial advisor who can assess your individual circumstances.
External Links
Our website may contain links to third-party websites, including auction houses, academic institutions, archives, museums, and other organizations relevant to historical cartography. These links are provided for your convenience and informational purposes only. Earliest Chicago Maps does not endorse, control, or assume responsibility for the content, privacy practices, or availability of any third-party websites. Inclusion of a link on our website does not imply our endorsement of the linked site or any association with its operators. We encourage you to review the terms of use and privacy policies of any third-party website you visit through links on our site.
Professional Services
Our authentication and appraisal reports represent the professional opinions of our cartographic specialists based on their expertise, training, and examination of the submitted materials. These opinions are formed through analysis of physical characteristics, comparison with known reference examples, review of provenance documentation, and application of established cartographic scholarship. However, authentication and appraisal are inherently subjective processes, and reasonable experts may reach different conclusions when examining the same document.
Our authentication reports indicate whether, in our professional opinion, a document is consistent with being an authentic example of the stated type, period, and origin. A positive authentication does not constitute an absolute guarantee of authenticity, as no authentication method is infallible. Similarly, our appraisal values represent our professional estimate of fair market value at the time of the appraisal and are based on comparable sales data, market conditions, and our assessment of the item's condition, rarity, and desirability. Actual sale prices may differ from appraised values.
Our research service consultations provide historical information and analysis based on our archival holdings and the expertise of our historians. Research findings are presented to the best of our ability but should be independently verified for use in legal proceedings, property disputes, or other matters with significant consequences.
Image Usage
The photographs and digital images displayed on our website are used for illustrative and promotional purposes. Some images depict original historical maps that may be held in public or private collections, and the display of these images on our website does not imply that Earliest Chicago Maps owns or has custody of the original documents. Images of maps from institutional collections are used under applicable fair use principles or with permission, and credit is provided where required.
Product photographs of our reproduction prints, framing examples, and gallery spaces are the property of Earliest Chicago Maps and may not be reproduced, downloaded, or used for any purpose without our prior written consent. If you wish to use any image from our website for editorial, academic, or commercial purposes, please contact us at info@earliestchicagomaps.com to discuss licensing arrangements.
Errors and Omissions
Despite our commitment to accuracy, errors and omissions may occasionally occur in the content published on our website, in our printed materials, or in our service deliverables. These may include typographical errors, incorrect dates, misattributed quotations, pricing errors, or outdated information. We reserve the right to correct any errors, inaccuracies, or omissions at any time without prior notice, including after an order has been placed or a service has been quoted.
If a pricing error is identified after you have placed an order but before it has been fulfilled, we will notify you of the correct price and give you the option to proceed with the corrected price or cancel the order for a full refund. We are not obligated to fulfill orders placed at incorrectly displayed prices.
If you discover an error or omission on our website or in any material we have provided, we appreciate your feedback. Please contact us at info@earliestchicagomaps.com so we can investigate and make corrections as appropriate.
Contact Information
If you have questions or concerns about this Disclaimer or any of the topics addressed above, please contact us:
Earliest Chicago Maps
714 South Dearborn Street, Suite 200
Chicago, IL 60605
Phone: (312) 555-0147
Email: info@earliestchicagomaps.com