Knowledge

Gunter's chain

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40: 342: 377:, or in the US, chaining; it is repeated until the destination rod is reached, when the surveyor notes how many full lengths (chains) have been laid, and he can then directly read how many links (one-hundredth parts of the chain) are in the distance being measured. The chain usually ends in a handle which may or may not be part of the measurement. An inner loop (visible in the NMAH photograph) is the correct place to put the pin for some chains. Many chains were made with the handles as part of the end link and thus were included in the measurement. 373:
in the ground at the destination point. Starting at the originating point the chain is laid out towards the ranging rod, and the surveyor then directs the chainman to make the chain perfectly straight and pointing directly at the ranging rod. A pin is put in the ground at the forward end of the chain, and the chain is moved forward so that its hind end is at that point, and the chain is extended again towards the destination point. This process is called
354: 320:...a Word or two of Dimensurators or Measuring Instruments, whereof the mosts usual has been the Chain, and the common length for English Measures 4 Poles, as answering indifferently to the Englishs Mile and Acre, 10 such Chains in length making a Furlong, and 10 single square Chains an Acre, so that a square Mile contains 640 square Acres...' 380:
The whole process is repeated for all the other pairs of points required, and it is a simple matter to make a scale diagram of the plot of land. The process is surprisingly accurate and requires only very low technology. Surveying with a chain is simple if the land is level and continuous—it is not
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a field or other parcel of land with Gunter's chain is to first determine corners and other significant locations, and then to measure the distance between them, taking two points at a time. The surveyor is assisted by a chainman. A ranging rod (usually a prominently coloured wooden pole) is placed
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The 66-foot (20.1 m) chain is divided into 100 links, usually marked off into groups of 10 by brass rings or tags which simplify intermediate measurement. Each link is thus 7.92 inches (201 mm) long. A quarter chain, or 25 links, measures 16 feet 6 inches (5.03 m) and thus
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measured 10 square chains in Gunter's system, the entire process of land area measurement could be computed using measurements in chains, and then converted to acres by dividing the results by 10. Hence 10 chains by 10 chains (100 square chains) equals 10 acres, 5 chains by 5 chains (25 square
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Geodaesia: or, The art of surveying and measuring land made easy : shewing, by plain and practical rules, how to survey, protract, cast up, reduce or divide any piece of land whatsoever : with new tables for the ease of the surveyor in reducing the measure of
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plats are published in the chain unit to maintain the consistency of a two-hundred-year-old database. In the Midwest of the US it is not uncommon to encounter deeds with references to chains, poles, or rod units, especially in farming country. Minor roads surveyed in
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physically practicable to range across large depressions or significant waterways, for example. On sloping land, the chain was to be "leveled" by raising one end as needed, so that undulations did not increase the apparent length of the side or the area of the tract.
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Gunter's chain reconciled two seemingly incompatible systems: the traditional English land measurements, based on the number four, and decimals based on the number 10. Since an
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made chains with 9.90-inch links, most commonly as 33-foot half-chains of 40 links. These chains were sometimes used in the American colonies, particularly Pennsylvania.
1866: 920: 2415: 403:. This unit still exists as a location identifier on British railways, as well as all across America in what is called the public land survey system. In the 842: 748: 661: 493:, surveying chains 20 metres (65 ft 7.4 in) (occasionally 30 metres) in length are used. Links are 200 millimetres (7.87 in) long. 800: 1859: 913: 534: 449:(0.3048 m) long. The original of such chains was that constructed, to very high precision, for the measurement of the baselines of the 2374: 765: 468:(33 feet, 10.0584 m) length. Each rod (or perch or pole) consists of 100 links, (1.98 inches, 50.292 mm each), which are called 601: 1274: 454: 858: 631: 1215: 1852: 1225: 906: 893: 572: 723: 701: 688: 17: 1190: 450: 782: 316:
chains) equals 2.5 acres. By the 1670s the chain and the link had become statutory units of measurement in England.
1828: 504:, 10-metre (32 ft 9.7 in) chains, of 50 links each 200 millimetres (7.87 in) long were used until the 1950s. 264:(1581–1626). It enabled plots of land to be accurately surveyed and plotted, for legal and commercial purposes. 2395: 276: 157: 58: 839: 1875: 745: 1267: 1026: 971: 1833: 653: 408: 399:), its legacy was a new statutory unit of length called the chain, equal to 22 yards (66 feet) of 100 2369: 1823: 1230: 2400: 796: 2405: 1260: 1195: 1185: 1180: 2262: 1699: 1220: 1210: 966: 1898: 1311: 1200: 888: 297: 45: 39: 2338: 2288: 1715: 1240: 1235: 941: 929: 830:
Denny, Milton. "The Colonial Surveyor in Pennsylvania", Surveyors Historical Society, 2013.
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Plomion, Charles. Arithmétique-Cours élémentaire, Librairie A. Hatier, Paris, 1925
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Zupko, Ronald Edward. A Dictionary of Weights and Measures for the British Isles
260:. It was designed and introduced in 1620 by English clergyman and mathematician 2333: 2293: 2162: 1785: 1760: 1720: 1653: 1612: 1562: 1283: 1161: 1156: 1081: 976: 395:
Although link chains were later superseded by the steel ribbon tape (a form of
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John Love (1688). "VII : How to cast up the Contents of a Plot of Land".
2389: 2236: 2198: 2132: 1806: 1765: 1730: 1668: 1582: 1386: 1381: 1166: 1146: 1116: 1041: 1036: 735:. Longman, Brown, Green and Longmans. London. p. 29. Retrieved April 7, 2009. 501: 437: 424: 404: 261: 127: 2308: 2283: 2193: 2178: 2112: 1948: 1933: 1745: 1663: 1648: 1643: 1628: 1587: 1552: 1526: 1417: 1371: 1356: 1126: 1111: 1101: 1096: 1091: 1066: 1031: 1001: 991: 946: 483: 396: 390: 268: 2323: 2303: 2183: 2117: 2091: 2050: 1986: 1976: 1971: 1966: 1918: 1913: 1908: 1780: 1735: 1658: 1633: 1567: 1557: 1506: 1432: 1422: 1412: 1407: 1402: 1336: 1331: 1326: 1016: 996: 755:. Chapter 2, Section 8: Public Roads. New Zealand Institute of Surveyors. 446: 417: 400: 272: 117: 2318: 2298: 2267: 2241: 2086: 2055: 2045: 2024: 2019: 2014: 2009: 1928: 1750: 1725: 1694: 1511: 1501: 1475: 1470: 1460: 1455: 1351: 1141: 1131: 1076: 1046: 1011: 956: 465: 293: 241: 2213: 2137: 2096: 1673: 1056: 420:
in the 19th and early 20th centuries are customarily one chain wide.
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Gunter developed an actual measuring chain of 100 links. These, the
2208: 2040: 1678: 1592: 1547: 1496: 1121: 951: 861:- R. Gopalakrishnan, Sri Venkateswara College of Engineering (pdf) 464:, also from the 17th century, is based on a 200-link chain of two 2231: 1938: 1775: 1366: 1252: 1106: 374: 301: 2127: 2070: 1577: 1531: 1465: 1346: 78: 725:
A complete treatise on practical land-surveying, Ninth edition
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Craven, Ian; Gray, Martin; Stoneham, Geraldine (1994).
445:, where the chain consists also of 100 links, each one 349:, New Zealand, laid down in 1880 to standardize surveys 131: 435:
A similar American system, of lesser popularity, is
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Customary units of measurement in the United States
1874: 928: 2387: 500:, and later in countries that had adopted the 1860: 1268: 914: 2416:Length, distance, or range measuring devices 27:Distance measuring device used for surveying 430: 1867: 1853: 1275: 1261: 921: 907: 532: 256:) is a distance-measuring device used for 563: 455:Principal Triangulation of Great Britain 352: 340: 687:. Vol. 1 (16th ed.). p.  621: 557: 14: 2388: 682: 357:Surveyor's chain, New York state, US, 1848: 1256: 902: 777:. Cambridge University Press. p. 27. 1885:Comparison with imperial unit system 1293:Comparison with US customary system 803:from the original on 1 October 2017 794: 746:"Land Title Surveys in New Zealand" 545:from the original on 19 August 2016 24: 1282: 634:from the original on 9 August 2018 571:. London: J. Taylor. p. 122. 25: 2427: 2375:Foot–pound–second system of units 877: 664:from the original on 26 July 2018 384: 279:in England and subsequently the 38: 864: 852: 849:My Agriculture information bank 833: 824: 815: 788: 758: 744:McKay, Donald F. (ed.) (2009). 604:from the original on 2023-08-11 575:from the original on 2024-04-28 451:Anglo-French Survey (1784–1790) 1829:Foot–pound–second system (FPS) 738: 716: 694: 676: 646: 624:"How to Make a Gunter's Chain" 615: 586: 539:www.northcravenheritage.org.uk 526: 286: 13: 1: 1876:United States customary units 840:Instruments used in Surveying 519: 358: 972:Coordinate-measuring machine 884:How to make a Gunter's Chain 7: 1834:Twenty-foot equivalent unit 507: 10: 2432: 2268:Kilopounds per square inch 767:Australian Popular Culture 611:– via Fulltable.com. 388: 90:1 gunter's chain 2370:English Engineering Units 2347: 2276: 2250: 2224: 2171: 2150: 2105: 2079: 2033: 2002: 1995: 1959: 1891: 1882: 1824:English Engineering units 1794: 1708: 1687: 1621: 1605: 1540: 1489: 1448: 1441: 1395: 1299: 1290: 1175: 937: 700:Holloway, Thomas (1881). 535:"Rods, poles and perches" 480:, 19.8 inches, 0.503 m). 472:(″), ten of which make a 427:is one chain (22 yards). 336: 230: 196: 192: 174: 166: 156: 151: 123: 106: 102: 84: 74: 57: 52: 37: 32: 2277:Other units and measures 1709:Other units and measures 1216:Machine and metalworking 894:Nineteenth century image 722:Nesbit, Anthony (1847). 431:Similar measuring chains 304:and 80 chains measure a 300:). Ten chains measure a 1226:Measuring and alignment 622:Manthey, David (2002). 345:Standard chain mark in 2263:Pounds per square inch 1700:Pounds per square inch 703:The practical surveyor 683:Punmia, B. C. (2005). 365: 350: 334: 200:imperial/US units 162:imperial/US units 110:imperial/US units 2396:Surveying instruments 1899:Thousandth of an inch 1312:Thousandth of an inch 460:The even less common 356: 344: 318: 180:1 gunter's link 46:Campus Martius Museum 18:Surveyor's chain 2339:Ton of refrigeration 2289:British thermal unit 1716:British thermal unit 1191:Cutting and abrasive 1027:Laser measuring tool 514:Distance measurement 496:In France after the 254:Gunter's measurement 2355:American wire gauge 2329:Pound-foot (torque) 2314:Foot-pound (energy) 932:and alignment tools 797:"Law 6 – the pitch" 660:. 25 October 2016. 409:Public Lands Survey 407:(US), for example, 187:... is equal to ... 97:... is equal to ... 53:General information 2365:Body jewelry sizes 2360:Avoirdupois system 1802:Avoirdupois system 1137:Thread pitch gauge 962:Combination square 845:2018-07-07 at the 773:2024-04-28 at the 751:2015-05-23 at the 731:2024-04-28 at the 709:2024-04-28 at the 533:Slater; Saunders. 366: 351: 277:statutory measures 238:    232:    204:    198:    138:    125:    114:    108:    44:Gunter's chain at 33:Gunter's chain 2383: 2382: 2146: 2145: 1842: 1841: 1601: 1600: 1250: 1249: 942:Architect's scale 654:"Types of Chains" 498:French Revolution 443:engineer's system 247: 246: 234:metric (SI) units 175:Conversions 147: 146: 85:Conversions 16:(Redirected from 2423: 2000: 1999: 1869: 1862: 1855: 1846: 1845: 1446: 1445: 1277: 1270: 1263: 1254: 1253: 1022:Laser line level 987:Engineer's scale 982:Drafting machine 923: 916: 909: 900: 899: 871: 868: 862: 856: 850: 837: 831: 828: 822: 819: 813: 812: 810: 808: 792: 786: 762: 756: 742: 736: 720: 714: 698: 692: 691: 680: 674: 673: 671: 669: 650: 644: 643: 641: 639: 619: 613: 612: 610: 609: 590: 584: 583: 581: 580: 561: 555: 554: 552: 550: 530: 479: 423:The length of a 363: 360: 332: 239: 233: 220: 218: 217: 214: 211: 205: 199: 149: 148: 139: 126: 115: 109: 42: 30: 29: 21: 2431: 2430: 2426: 2425: 2424: 2422: 2421: 2420: 2401:Units of length 2386: 2385: 2384: 2379: 2348:Related systems 2343: 2272: 2258:Inch of mercury 2246: 2220: 2167: 2158:Feet per second 2142: 2101: 2075: 2029: 1991: 1955: 1887: 1878: 1873: 1843: 1838: 1795:Related systems 1790: 1756:Horsepower-hour 1704: 1683: 1617: 1597: 1536: 1485: 1437: 1391: 1295: 1286: 1281: 1251: 1246: 1245: 1171: 1087:Sliding T bevel 933: 927: 889:Image from 1675 880: 875: 874: 869: 865: 857: 853: 847:Wayback Machine 838: 834: 829: 825: 820: 816: 806: 804: 793: 789: 775:Wayback Machine 763: 759: 753:Wayback Machine 743: 739: 733:Wayback Machine 721: 717: 711:Wayback Machine 699: 695: 681: 677: 667: 665: 658:The Constructor 652: 651: 647: 637: 635: 628:Orbital Central 620: 616: 607: 605: 592: 591: 587: 578: 576: 562: 558: 548: 546: 531: 527: 522: 510: 477: 462:Rathborn system 433: 393: 387: 361: 339: 333: 324: 289: 252:(also known as 237: 231: 222: 215: 212: 209: 208: 206: 203: 197: 137: 124: 113: 107: 48: 28: 23: 22: 15: 12: 11: 5: 2429: 2419: 2418: 2413: 2408: 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1198: 1193: 1188: 1183: 1181:Types of tools 1177: 1176: 1173: 1172: 1170: 1169: 1167:Winding sticks 1164: 1159: 1157:Weighing scale 1154: 1149: 1144: 1139: 1134: 1129: 1124: 1119: 1114: 1109: 1104: 1099: 1094: 1089: 1084: 1079: 1074: 1069: 1064: 1059: 1054: 1049: 1044: 1039: 1034: 1029: 1024: 1019: 1014: 1009: 1007:Gunter's chain 1004: 999: 994: 989: 984: 979: 977:Diagonal scale 974: 969: 964: 959: 954: 949: 944: 938: 935: 934: 926: 925: 918: 911: 903: 897: 896: 891: 886: 879: 878:External links 876: 873: 872: 863: 851: 832: 823: 814: 787: 757: 737: 715: 693: 675: 645: 614: 585: 556: 524: 523: 521: 518: 517: 516: 509: 506: 432: 429: 389:Main article: 386: 385:Unit of length 383: 368:The method of 338: 335: 322: 288: 285: 281:British Empire 250:Gunter's chain 245: 244: 235: 228: 227: 221:Gunter's chain 201: 194: 193: 190: 189: 184: 177: 176: 172: 171: 168: 164: 163: 160: 154: 153: 145: 144: 135: 121: 120: 111: 104: 103: 100: 99: 94: 87: 86: 82: 81: 76: 72: 71: 61: 55: 54: 50: 49: 43: 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376: 371: 355: 348: 343: 330: 329: 325:John Ogilby, 321: 317: 314: 309: 307: 303: 299: 295: 284: 282: 278: 274: 270: 265: 263: 262:Edmund Gunter 259: 255: 251: 243: 236: 229: 226: 202: 195: 191: 188: 185: 183: 179: 178: 173: 169: 165: 161: 159: 155: 152:Gunter's link 150: 143: 136: 133: 129: 122: 119: 112: 105: 101: 98: 95: 93: 89: 88: 83: 80: 77: 73: 69: 65: 62: 60: 56: 51: 47: 41: 36: 31: 19: 2309:Foot-lambert 2284:Bolt (cloth) 1746:Foot-poundal 1664:Long hundred 1644:Pound (mass) 1568:Fluid Drachm 1527:Trade gallon 1361: 1127:Tape measure 1112:Straightedge 1102:Steel square 1097:Spirit level 1092:Speed square 1067:Radius gauge 1032:Lesbian rule 1006: 1002:French curve 992:Feeler gauge 947:Beam compass 866: 854: 835: 826: 817: 805:. 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Retrieved 538: 528: 495: 488: 484:Vincent Wing 482: 473: 469: 461: 459: 442: 436: 434: 422: 397:tape measure 394: 391:Chain (unit) 379: 367: 326: 319: 310: 306:statute mile 290: 266: 253: 249: 248: 186: 181: 167:Unit of 96: 91: 75:Unit of 2304:Foot-candle 2237:Pound-force 2051:Fluid ounce 1987:Square mile 1977:Square yard 1972:Square foot 1967:Square inch 1736:Foot-candle 1507:Fluid ounce 1433:Square mile 1413:Square yard 1408:Square foot 1403:Square inch 1241:Woodworking 1017:Laser level 997:Flat spline 859:Surveying I 807:23 November 418:New Zealand 362: 1830 292:measures a 287:Description 158:Unit system 70: units 59:Unit system 2390:Categories 2319:Horsepower 2299:Fahrenheit 2087:Board foot 2046:Tablespoon 2025:Cubic mile 2020:Cubic yard 2015:Cubic foot 2010:Cubic inch 1812:Winchester 1771:Pound-foot 1751:Horsepower 1741:Foot-pound 1726:Fahrenheit 1502:Tablespoon 1476:Cubic mile 1471:Cubic yard 1461:Cubic foot 1456:Cubic inch 1317:Barleycorn 1142:Try square 1132:Theodolite 1077:Set square 1062:Protractor 1052:Micrometer 1047:Meterstick 957:Chalk line 608:2023-08-09 579:2018-07-26 520:References 275:, became 223:7.92  140:20.1  2138:Acre-foot 2097:Face cord 1817:Exchequer 1674:Ship load 1057:Plumb-bob 930:Measuring 685:Surveying 598:Britannia 594:"Preface" 438:Ramsden's 414:Australia 370:surveying 347:Whanganui 328:Britannia 258:surveying 240:200  2251:Pressure 2041:Teaspoon 1688:Pressure 1593:Hogshead 1548:Chaldron 1497:Teaspoon 1196:Forestry 1186:Cleaning 1122:T-square 952:Calipers 843:Archived 801:Archived 771:Archived 749:Archived 729:Archived 707:Archived 668:4 August 662:Archived 638:2 August 632:Archived 602:Archived 600:. 1675. 573:Archived 543:Archived 508:See also 453:and the 323:—  271:and the 116:22  64:imperial 2232:Poundal 2034:Cooking 2003:Derived 1949:statute 1939:Furlong 1776:Poundal 1761:Kenning 1731:Rankine 1654:Quarter 1490:Cooking 1449:Derived 1367:Furlong 1221:Masonry 1211:Kitchen 1162:Wiggler 1107:Stencil 1082:Skirret 967:Compass 549:22 July 470:seconds 441:or the 375:ranging 302:furlong 219:⁠ 207:⁠ 134:) units 2133:Barrel 2128:Bushel 2071:Gallon 1996:Volume 1892:Length 1721:Degree 1634:Drachm 1583:Barrel 1578:Bushel 1532:Gallon 1466:Hoppus 1442:Volume 1387:League 1347:Fathom 1300:Length 1231:Mining 1201:Garden 1117:Square 781:  337:Method 331:, 1675 182:in ... 170:length 128:metric 92:in ... 79:length 2225:Force 2214:Short 2194:Pound 2189:Ounce 2179:Grain 2151:Speed 2113:Minim 2106:Other 2066:Quart 1934:Chain 1649:Stone 1639:Ounce 1629:Grain 1606:Speed 1588:Stuck 1553:Minim 1541:Other 1522:Quart 1481:Tmcft 1418:Perch 1372:Cable 1357:Chain 1236:Power 1072:Ruler 491:India 474:prime 401:links 269:chain 2324:Perm 2209:Long 2184:Dram 2172:Mass 2123:Peck 2118:Gill 2092:Cord 2080:Wood 2061:Pint 1982:Acre 1960:Area 1944:Mile 1924:Yard 1919:Foot 1914:Link 1909:Hand 1904:Inch 1781:Span 1659:Slug 1622:Mass 1573:Peck 1558:Gill 1517:Pint 1428:Acre 1423:Rood 1396:Area 1377:Mile 1342:Yard 1337:Foot 1332:Link 1327:Hand 1322:Inch 1307:Twip 1206:Hand 1152:Vise 809:2018 779:ISBN 670:2018 640:2018 568:land 551:2018 466:rods 447:foot 416:and 313:acre 298:pole 296:(or 273:link 2242:Kip 2204:Ton 2056:Cup 1929:Rod 1695:Ksi 1679:Ton 1512:Cup 1352:Rod 1012:Jig 689:39. 489:In 294:rod 216:100 2392:: 799:. 656:. 630:. 626:. 596:. 541:. 537:. 457:. 359:c. 308:. 283:. 242:mm 225:in 132:SI 118:yd 68:US 1868:e 1861:t 1854:v 1276:e 1269:t 1262:v 922:e 915:t 908:v 811:. 785:. 672:. 642:. 582:. 553:. 478:′ 476:( 213:/ 210:1 142:m 130:( 66:/ 20:)

Index

Surveyor's chain

Campus Martius Museum
Unit system
imperial
US
length
yd
metric
SI
m
Unit system
in
mm
surveying
Edmund Gunter
chain
link
statutory measures
British Empire
rod
pole
furlong
statute mile
acre
Britannia

Whanganui

surveying

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