Knowledge (XXG)

Sanborn maps

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356: 303: 472: 340:. Line carding had been used for decades to underwrite properties that were not covered by fire maps. Each insured property was listed on a single card, and no map was kept. Corporate mergers also reduced the need for Sanborn Maps, since the consolidated company only needed to buy one set of maps. As insurance companies increased in size, they could withstand larger disasters and no longer needed to use insurance maps to reduce their concentration of risk. Companies also cited "modern building construction, better 40: 299:. The Sanborn Company sent out legions of surveyors to map building footprints in all major urbanized areas, along with building details related to fire risk. At its peak in the 1920s, the company employed about 700 people, including about 300 field surveyors and 400 cartographers, printers, managers, salesmen, and support staff. Areas under intensive development were surveyed every six months. 411: 218: 315:
investigated the possibility of creating its own maps. However, many insurance companies opposed the proposal, citing the "very large expenditure" required and their satisfaction with Sanborn's "commendably satisfactory" service. Instead, the NBFU Map Committee took an active role in Sanborn's operations. In 1922, Sanborn agreed to add a member of the Map Committee to its
209:, the location of gas lines, etc. The decision as to how much, if any, insurance would be offered to a customer was often determined solely through the use of a Sanborn map. The maps also allowed insurance companies to visualize their exposure in their coverage areas; when an agent sold a policy, he could color in the corresponding building on the map. 347:
From the late 1930s to the late 1950s, Sanborn's annual profit fell from $ 500,000 to just $ 100,000. About thirty insurance companies accounted for most of the company's sales. However, its monopoly over insurance mapping had allowed it to earn substantial profits over the decades. These profits
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Within several decades, the company became the largest and most successful American map company. This growth came about through savvy management and the buyout of competing firms. In 1889 Sanborn acquired Perris and Browne, an older firm, and can by virtue of this expansion date its origins to 1852.
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In the late 18th century, insurance companies in London began to create detailed maps to give underwriters the information they needed to assess fire risk. The practice was adopted by American insurance companies in the mid-19th century. Demand for fire insurance mapping grew rapidly after the end
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visited every property that was under consideration for coverage. As insurance companies increased their service areas, it was no longer practical to send people to every insurable property to assess the risk. The Sanborn maps allowed them to underwrite properties from the office, pooling the cost
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and public and university libraries, and remain a resource for people in many different fields. The maps facilitate historical research through the study of urban growth and decline patterns, and for research into the evolution of specific buildings, sites and districts. Genealogists use the maps
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Sanborn's monopoly was resented by some insurance companies for its high cost. The Underwriter's Association of the Pacific complained that an "Eastern monopoly" was giving service that was "very slow, expensive, and generally unsatisfactory." In the 1910s, the National Board of Fire Underwriters
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The map volumes contain an enormous amount of information. They are organized as follows: a decorative title page; an index of streets and addresses; a β€˜specials’ index with the names of churches, schools, businesses etc.; and a master index indicating the entirety of the mapped area and the sheet
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street plans at a scale of 50 feet to one inch (1:600) on 21 by 25 inches (53 by 64 cm) sheets of paper. The maps were published in volumes, bound and then updated until the subsequent volume was produced. Larger cities would be covered by multiple volumes of maps. Between editions of
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and urban geographers use them to study patterns of growth and migration of populations. Environmental scientists also use the maps for historical analysis of properties, as the maps often showed the locations of gas stations, drycleaners, and other potential sources of soil and groundwater
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The firm name established by Sanborn in 1867 was changed in 1876 when the firm was incorporated under the name Sanborn Map and Publishing Company, which then became the Sanborn-Perris Map Company, Ltd. until 1902, when the name was shortened to the Sanborn Map Company.
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companies to assess their total liability in urbanized areas of the United States. Since they contain detailed information about properties and individual buildings in approximately 12,000 U.S. cities and towns, Sanborn maps are valuable for documenting changes in the
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Over time, Sanborn diversified into other mapping activities, and as of 2020 is a geospatial specialist and holder of electronic GIS assets and systems, though the fire insurance business continues as a niche department. Corporate headquarters are in Colorado.
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in 1977, but old Sanborn maps remain useful for historical research into urban geography. The license for the maps was acquired by land data company Environmental Data Resources (EDR), and EDR was acquired in 2019 by real estate services company LightBox.
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With the decline of its insurance business, Sanborn could no longer afford to maintain its army of surveyors. However, the company continued to sell its maps and perform some updates. Government sales began to play a larger role, especially the
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Sanborn held a monopoly over fire insurance maps for the majority of the 20th century, but the business declined as US insurance companies stopped using maps for underwriting in the 1960s. The last Sanborn fire maps were published on
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Volume 1, 1867. Seeing a lucrative market for this type of map, he established the D. A. Sanborn National Insurance Diagram Bureau in New York City to publish the Boston atlas and develop and sell maps of additional areas.
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greatly curtailed construction activity in the United States. By 1936, Sanborn had reduced its publishing output from 60 to 20 volumes per year, a pace that would take over 50 years to update the entire map collection.
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The maps were utilized by insurance companies to determine the potential risk of a particular building, taking into account all of the information included on the map: building material, proximity to other buildings and
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Maps are kept of business in the downtown district and proper care is exercised in considering block lines and conflagration hazard. They propose to institute a line card system to properly care for lines not shown on
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shares from any shareholder at fair value, paying with a portion of its investment portfolio. 72% of the outstanding shares were turned in. In just two years, Buffett had secured a 50% return on his investment.
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published volumes, map updates were sent out as correction slips. Sanborn employees, called "pasters" or "correctors", would visit subscribers' offices to paste the slips on top of the old maps.
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The maps include outlines of each building and outbuilding; the location of windows and doors; street names; street and sidewalk widths; property boundaries; fire walls; natural features (
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were invested in a portfolio of stocks and bonds. By 1958, the stock was selling for $ 45 a share, but the investments were worth $ 65 a share. This attracted the attention of a young
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use the maps to understand the significance and historical evolution of buildings, including their historic uses and building materials in conservation and rehabilitation efforts.
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Stated simply, the Sanborn maps survive as a guide to American urbanization that is unrivaled by other cartography and, for that matter, by few documentary resources of any kind.
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with other insurance companies that also subscribed to the maps. It was said that at one time, insurance companies and their agents β€œrelied upon them with almost blind faith”.
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In 1996, the license for the maps was acquired by land data company Environmental Data Resources (EDR). In 2019, EDR was acquired by real estate services company LightBox.
731: 910: 722:. Regarding Sanborn's acquisition of Perris, Ristow gives the year as 1899, but on the published maps the name changed from 1889 to 1890. See for example the 1246: 162:
numbers for each large-scale map (usually depicting four to six blocks); and general information such as population, economy and prevailing wind direction.
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Unique information includes the location of the homes of prominent individuals, brothels, and more ephemeral buildings including outhouses and stables.
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and municipal planning agencies. Sanborn printed its last catalog in 1950, created its last new map in 1961, and issued its last update in 1977.
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including the framing, flooring, and roofing materials; the strength of the local fire department; indications of sprinkler systems; locations of
1193: 1224: 173:, etc.); railroad corridors; building use (sometimes even particular room uses); house and block number; as well as the composition of 1144: 1111: 1021: 988: 775: 458: 632: 246: 1065: 436: 914: 1032: 432: 1215: 1129: 242: 385: 421: 371:. Allied with other dissatisfied shareholders, Buffett could count on the votes of at least 44% of the shares in a 1120: 255:, a civil engineer and surveyor, began working on fire insurance maps in 1866. That year, he was contracted by the 440: 425: 665: 1046: 973: 471: 279:
In 1916, Sanborn purchased its last major competitor, the E. Hexamer & Sons of Philadelphia, and became a
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Annual Report of the Commissioner of Insurance of the State of Alabama for the Year Ending December 31, 1921
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are detailed maps of U.S. cities and towns in the 19th and 20th centuries. Originally published by
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Insurance Maps of the City of New York Surveyed and Published by Sanborn–Perris Map Co., Limited
359:"New Orleans Brewing Association" Brewery in 1896 from Sanborn Fire Insurance Map of New Orleans 39: 1138: 771: 364: 344:, and improved fire protection methods for the decline in importance of fire insurance maps." 174: 133: 1189: 507:, and from the copyright owners, Environmental Data Resources (EDR), a division of LightBox. 376: 320: 284: 222: 1088: 688:
Ristow, Walter W. (1968). "United States Fire Insurance and Underwriters Maps: 1852–1968".
770:(2008 Trade Paperback ed.). New York: Random House Trade Paperbacks. pp. 65–66. 503:
Historic Sanborn maps are available through public or university libraries, including the
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all fostered huge population growths, urbanization, and heightened demand for mapping.
193: 128: 1211: 1198: 895: 306:"MARKET STREET CABLE R. W. CO." in 1889 map detail from Sanborn Fire Insurance Map of 1240: 850: 716: 516: 341: 307: 288: 234: 1183: 982: 352:, who pressured the company to distribute the investment portfolio to shareholders. 1082: 1076: 992: 730:. Volume 3. (New York: Sanborn Map & Publishing Company Limited, 1889) and the 333: 197: 178: 1168: 862: 1153: 496: 476: 410: 372: 594:"Silver Lake-backed startup Lightbox makes even more RE Tech acquisition noise" 217: 1026: 154: 1061: 564: 483: 482:
Sanborn maps are found primarily in the archives and special collections of
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Buffett eventually purchased 23% of the company's outstanding shares as an
964: 1004:– Digital Sanborn Fire Maps of San Jose available to library card holders 911:"Historical Atlases Rescued from the Trash Could be a Boon to Historians" 280: 238: 112: 53: 997: 958: 701: 1107: 296: 292: 332:
In the 1950s, insurance companies began to use an alternative form of
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Early 20th century Sanborn map showing a (since demolished) block of
264: 1202: 882:. Geostat Center and Department of History, University of Virginia 470: 354: 319:, and a second seat was added by 1927. However, the onset of the 301: 256: 216: 170: 166: 933:. Digital Collections, Berkeley Library, University of California 751:. Montgomery, Alabama: Brown Printing Company. 1922. p. 44. 1017: 404: 283:. Company headquarters moved to 629 Fifth Avenue in northern 952: 845: 791: 955:β€” pay site (free from some public and academic libraries) 367:, representing 35% of his investment partnership's total 491:
use the maps to study historic urban planning designs.
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to locate the residences and workplaces of ancestors.
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Detailed maps of cities and towns in the United States
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Sanborn Fire Insurance Maps of Wisconsin Communities
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Sanborn Maps of Milwaukee, Wisconsin, 1894 and 1910
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Fire Insurance Maps: Their History and Applications
108: 100: 92: 84: 69: 59: 49: 539:Keister, Kim (May–June 1993). "Charts of Change". 221:1911 Sanborn map showing Lagoon Amusement Park in 1043:Sanborn Maps of Indianapolis, Indiana, 1887–1941 690:The Quarterly Journal of the Library of Congress 989:Sanborn Maps of San Francisco, California, 1905 983:Sanborn Maps of San Francisco, California, 1900 633:"Introduction to the Collection – Sanborn Maps" 1108:Sanborn Maps of St. Louis, Missouri, 1870–1904 880:"Sanborn Fire Insurance Maps, A Brief History" 666:"Letter from Warren Buffett to Partners, 1960" 768:Buffett: The Making of an American Capitalist 659: 657: 655: 653: 534: 532: 8: 683: 681: 679: 677: 675: 153:The Sanborn maps themselves are large-scale 32: 1158:University of North Carolina at Chapel Hill 728:Insurance Maps of San Francisco, California 439:. Unsourced material may be challenged and 1135:Sanborn Maps of New Hampshire, 1880s–1940s 1052:Sanborn Maps of Muncie, Indiana, 1883–1911 1037:University of Illinois at Urbana-Champaign 959:Sanborn Maps, Environmental Data Resources 851:Introduction to the Sanborn Map Collection 718:Introduction to the Sanborn Map Collection 287:, but there were also regional offices in 127:(Sanborn), the maps were created to allow 38: 31: 1190:Sanborn Maps of South Carolina, 1884–1960 1154:Sanborn Maps of North Carolina, 1884–1922 1077:Sanborn Maps of Frankfort, Kentucky, 1907 825:. College Station, Texas: Lacewing Press. 459:Learn how and when to remove this message 1221:Sanborn Maps of Kenosha, Wisconsin, 1918 953:ProQuest Digital Sanborn Maps, 1867–1970 863:"Information About Digital Sanborn Maps" 834:. Detroit: Wayne State University Press. 1179:Pennsylvania State University Libraries 1175:Sanborn Maps of Pennsylvania, 1884–1958 1033:Sanborn Fire Insurance Maps of Illinois 588: 586: 565:"Library Announces Digital Map Project" 528: 1083:Sanborn Maps of Hallowell, Maine, 1890 559: 557: 136:of American cities over many decades. 113:https://edrnet.com/prods/sanborn-maps/ 1126:Sanborn Maps of New Jersey, 1884–1950 627: 625: 623: 621: 619: 617: 615: 7: 1207:Marriott Library Special Collections 1194:University of South Carolina Library 998:Sanborn Maps of San Jose, California 437:adding citations to reliable sources 1247:Urban planning in the United States 1099:Sanborn Maps of Missouri, 1883–1951 1071:Sanborn Maps of Kentucky, 1884–1922 1008:Sanborn Maps of Colorado, 1883–1922 1252:Map companies of the United States 1203:University of Utah Digital Library 1169:Sanborn Maps of Toledo, Ohio, 1902 1112:Washington University in St. Louis 1027:Sanborn Maps of Georgia, 1884–1922 1018:Sanborn Maps of Florida, 1860–1923 974:Sanborn Maps of Alabama, 1884–1950 401:Modern uses of fire insurance maps 25: 1117:Sanborn Maps of Nevada, 1879–1923 1062:Sanborn Maps of Kansas, 1883–1922 1184:Sanborn Maps of Texas, 1877–1922 1163:Sanborn Maps of Cincinnati, Ohio 965:Sanborn Maps from over 15 states 409: 247:immigration to the United States 1186:β€” University of Texas Libraries 44:Sanborn map of Boston from 1867 1066:University of Kansas Libraries 1: 1073:β€” Kentuckiana Digital Library 1022:University of Florida Library 896:"Sanborn Fire Insurance Maps" 738:. Volume 4. (New York: 1890). 328:Decline of insurance business 1216:Wisconsin Historical Society 1130:Princeton University Library 1029:β€” Digital Library of Georgia 259:to prepare maps of areas in 243:Second Industrial Revolution 1233:β€” UW Milwaukee, AGS Library 1199:Sanborn Fire Insurance Maps 832:American Maps and Mapmakers 1268: 1145:Insurance Maps of New York 1121:University of Nevada, Reno 796:Total Geospatial Solutions 766:Lowenstein, Roger (1995). 821:Oswald, Diane L. (1997). 493:Historic preservationists 37: 1047:IUPUI University Library 269:Insurance Map of Boston, 1149:New York Public Library 1002:San Jose Public Library 947:Digital map collections 830:Ristow, Walter (1985). 637:The Library of Congress 375:. The Board agreed to 369:assets under management 257:Aetna Insurance Company 233:. Factors such as the 125:The Sanborn Map Company 88:The Sanborn Map Company 1103:University of Missouri 1012:University of Colorado 479: 360: 311: 225: 188:Insurance underwriting 1095:Fogler Library, Orono 1089:Sanborn Maps of Maine 1056:Ball State University 978:University of Alabama 792:"Corporate home page" 541:Historic Preservation 474: 358: 305: 253:Daniel Alfred Sanborn 220: 192:At the outset of the 64:Daniel Alfred Sanborn 878:Chris Nehls (2003). 433:improve this section 1093:University of Maine 969:Library of Congress 855:Library of Congress 846:Sanborn Map Company 715:Ristow, Walter W., 569:Library of Congress 505:Library of Congress 342:building fire codes 34: 861:Tom Gates (2001). 571:. December 1, 1997 480: 361: 317:Board of Directors 312: 241:construction, the 226: 175:building materials 1139:Dartmouth College 664:Buffett, Warren. 469: 468: 461: 365:activist investor 134:built environment 118: 117: 16:(Redirected from 1259: 1171:β€” Toledo's Attic 942: 940: 938: 926: 924: 922: 913:. 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May 13, 2019 582: 553: 527: 526: 524: 521: 520: 519: 512: 509: 467: 466: 417: 415: 408: 402: 399: 350:Warren Buffett 329: 326: 214: 211: 194:fire insurance 189: 186: 150: 147: 129:fire insurance 116: 115: 110: 106: 105: 102: 98: 97: 94: 90: 89: 86: 82: 81: 71: 67: 66: 61: 57: 56: 51: 47: 46: 43: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1264: 1253: 1250: 1248: 1245: 1244: 1242: 1232: 1229: 1227:, AGS Library 1226: 1222: 1219: 1217: 1213: 1210: 1208: 1204: 1200: 1197: 1195: 1191: 1188: 1185: 1182: 1180: 1176: 1173: 1170: 1167: 1164: 1161: 1159: 1155: 1152: 1150: 1146: 1143: 1140: 1136: 1133: 1131: 1127: 1124: 1122: 1118: 1115: 1113: 1109: 1106: 1104: 1100: 1097: 1094: 1090: 1087: 1084: 1081: 1078: 1075: 1072: 1069: 1067: 1063: 1060: 1057: 1053: 1050: 1048: 1044: 1041: 1039:, Map Library 1038: 1034: 1031: 1028: 1025: 1023: 1019: 1016: 1013: 1009: 1006: 1003: 999: 996: 994: 990: 987: 984: 981: 979: 975: 972: 970: 966: 963: 960: 957: 954: 951: 950: 946: 932: 928: 916: 912: 908: 897: 893: 881: 876: 864: 859: 856: 852: 849: 847: 844: 843: 839: 833: 828: 824: 819: 818: 814: 797: 793: 787: 784: 779: 777:9780804150606 773: 769: 762: 759: 755: 750: 744: 741: 737: 733: 729: 725: 720: 719: 711: 708: 703: 699: 695: 691: 684: 682: 680: 678: 676: 672: 667: 660: 658: 656: 654: 650: 638: 634: 628: 626: 624: 622: 620: 618: 616: 612: 599: 598:The Real Deal 595: 589: 587: 583: 570: 566: 560: 558: 554: 550: 546: 542: 535: 533: 529: 522: 518: 517:Walter Ristow 515: 514: 510: 508: 506: 501: 498: 494: 490: 485: 478: 473: 463: 460: 452: 442: 438: 434: 428: 427: 423: 418:This section 416: 412: 407: 406: 400: 398: 396: 392: 389: 387: 386:Census Bureau 381: 378: 374: 370: 366: 357: 353: 351: 345: 343: 339: 335: 327: 325: 322: 318: 309: 308:San Francisco 304: 300: 298: 294: 290: 289:San Francisco 286: 282: 277: 273: 270: 266: 262: 258: 254: 250: 248: 244: 240: 236: 235:Homestead Act 232: 224: 219: 212: 210: 208: 202: 199: 195: 187: 185: 182: 180: 179:fire hydrants 176: 172: 168: 163: 159: 156: 148: 146: 143: 137: 135: 130: 126: 122: 114: 111: 107: 103: 99: 95: 91: 87: 83: 72: 68: 65: 62: 58: 55: 52: 48: 41: 36: 30: 19: 1225:UW Milwaukee 993:David Rumsey 935:. 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Index

Sanborn Maps

City map
Daniel Alfred Sanborn
https://edrnet.com/prods/sanborn-maps/
fire insurance
built environment
microfilm
lithographed
rivers
canals
building materials
fire hydrants
fire insurance
underwriters
fire departments

Farmington, Utah
Civil War
Homestead Act
railroad
Second Industrial Revolution
immigration to the United States
Daniel Alfred Sanborn
Aetna Insurance Company
Tennessee
Boston
monopoly
Pelham, New York
San Francisco

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