![A Plan of the Leicester Shire and Northampton shire intended Union Canal ; shewing its connection with the Grand Junction Canal at Northampton and with the River Trent by means of the Leicester Navigation : by which Channels it will communicate with most of the present Inland Navigations in the Kingdom [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3MDAvMTIvMzEvYS1wbGFuLW9mLXRoZS1sZWljZXN0ZXItc2hpcmUtYW5kLW5vcnRoYW1wdG9uLXNoaXJlLWludGVuZGVkLXVuaW9uLWNhbmFsLXNoZXdpbmctZGEyZmQyLTEwMjQuanBn/320/410/jpg "A Plan of the Leicester Shire and Northampton shire intended Union Canal ; shewing its connection with the Grand Junction Canal at Northampton and with the River Trent by means of the Leicester Navigation : by which Channels it will communicate with most of the present Inland Navigations in the Kingdom [Mapa]")
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![A Plan of the Proposed Union Canal, to join the Leicester Navigation with a Branch of the Grand Junction Canal, near Northampton : also of a Branch to Market Harborough [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3OTIvMTIvMzEvYS1wbGFuLW9mLXRoZS1wcm9wb3NlZC11bmlvbi1jYW5hbC10by1qb2luLXRoZS1sZWljZXN0ZXItbmF2aWdhdGlvbi13aXRoLWEtZDkxNDM1LTY0MC5qcGc%3D/40/23/webp "A Plan of the Proposed Union Canal, to join the Leicester Navigation with a Branch of the Grand Junction Canal, near Northampton : also of a Branch to Market Harborough [Mapa]")
![A Plan of the intented Canal & River Navigation from Thrinkston Bridge to Leicester : shewing its communications with the River Wreak to Meltin, and Likewise (by means of the rivers Soar & Trent) with the Grand Trunk and Erewash Canals [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3ODUvMTIvMzEvYS1wbGFuLW9mLXRoZS1pbnRlbnRlZC1jYW5hbC1hbmQtcml2ZXItbmF2aWdhdGlvbi1mcm9tLXRocmlua3N0b24tYnJpZGdlLXRvLWUyYjBhNC02NDAuanBn/40/25/webp "A Plan of the intented Canal & River Navigation from Thrinkston Bridge to Leicester : shewing its communications with the River Wreak to Meltin, and Likewise (by means of the rivers Soar & Trent) with the Grand Trunk and Erewash Canals [Mapa]")
![A Plan of the Intended Navigable Canal, from the Worcester & Birmingham Canal at Kings Norton, in the County of Worcester ; to Stratford upon Avon, in the County of Warwick ; also the collateral Branches to Grafton &c [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3OTIvMTIvMzEvYS1wbGFuLW9mLXRoZS1pbnRlbmRlZC1uYXZpZ2FibGUtY2FuYWwtZnJvbS10aGUtd29yY2VzdGVyLWFuZC1iaXJtaW5naGFtLWNhbmFsLTNjMjNjMi02NDAuanBn/40/17/webp "A Plan of the Intended Navigable Canal, from the Worcester & Birmingham Canal at Kings Norton, in the County of Worcester ; to Stratford upon Avon, in the County of Warwick ; also the collateral Branches to Grafton &c [Mapa]")
![Plan of Canals proposed ,to be made from the Grand Trunk Canal at Skardlow to the Towns of Derby and Nottingham [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3MDAvMTIvMzEvcGxhbi1vZi1jYW5hbHMtcHJvcG9zZWQtdG8tYmUtbWFkZS1mcm9tLXRoZS1ncmFuZC10cnVuay1jYW5hbC1hdC1za2FyZGxvdy10by0yMDIwYzUtNjQwLmpwZw%3D%3D/40/40/webp "Plan of Canals proposed ,to be made from the Grand Trunk Canal at Skardlow to the Towns of Derby and Nottingham [Mapa]")
![A Plan of the Erewash Canal, part of the Cromford canal and a proposed Canal from Langley Bridge to eh Trent near Nottingham ; shewing the relative situation they bear to each other and to the River Trent [and] A plan of a new Intended Canal From the Mouth of the Derwent River and the Grand Trunk Canal, cross the Ereswash Canal and Erewash River sjirting the lower parts of Nottingham and terminating below all the Shoals next adjoining, to, and below Trent Bridge [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3MDAvMTIvMzEvYS1wbGFuLW9mLXRoZS1lcmV3YXNoLWNhbmFsLXBhcnQtb2YtdGhlLWNyb21mb3JkLWNhbmFsLWFuZC1hLXByb3Bvc2VkLWNhbmFsLTEwMGVjMy02NDAuanBn/40/35/webp "A Plan of the Erewash Canal, part of the Cromford canal and a proposed Canal from Langley Bridge to eh Trent near Nottingham ; shewing the relative situation they bear to each other and to the River Trent [and] A plan of a new Intended Canal From the Mouth of the Derwent River and the Grand Trunk Canal, cross the Ereswash Canal and Erewash River sjirting the lower parts of Nottingham and terminating below all the Shoals next adjoining, to, and below Trent Bridge [Mapa]")
![A Plan an Profile of the proposed Navigable Canal from the Line of the Thames and Severn Canal in the Parish of Kempsford and County of Gloucester, to the River Thames at Abingdon in the County of Berks [Mapa]](https://cache.getarchive.net/Prod/thumb/cdn8/L3Bob3RvLzE3ODQvMTIvMzEvYS1wbGFuLWFuLXByb2ZpbGUtb2YtdGhlLXByb3Bvc2VkLW5hdmlnYWJsZS1jYW5hbC1mcm9tLXRoZS1saW5lLW9mLXRoZS10aGFtZXMtZjFmZDZmLTY0MC5qcGc%3D/40/20/webp "A Plan an Profile of the proposed Navigable Canal from the Line of the Thames and Severn Canal in the Parish of Kempsford and County of Gloucester, to the River Thames at Abingdon in the County of Berks [Mapa]")
A Plan of the Leicester Shire and Northampton shire intended Union Canal ; shewing its connection with the Grand Junction Canal at Northampton and with the River Trent by means of the Leicester Navigation : by which Channels it will communicate with most of the present Inland Navigations in the Kingdom [Mapa]
Summary
Comprende la zona entre las siguientes ciudades inglesas : Liverpool, York, Bristol y Londres
In the 17th century, maps took a huge leap forward. Mathematical and astronomical knowledge necessary to make accurate measurements had evolved. English mathematicians had perfected triangulation: navigation and surveying by right-angled triangles. Triangulation allowed navigators to set accurate courses and produced accurate land surveys. Seamen learned to correct their compasses for declination and had determined the existence of annual compass variation. Latitude determination was greatly improved with the John Davis quadrant. The measurement of distance sailed at sea was improved by another English invention, the common log. Longitudinal distance between Europe and Québec was determined by solar and lunar eclipses by the Jesuit Bressani in the 1640s and by Jean Deshayes in 1686. With accurate surveys in Europe, the grid of the modern map began to take shape.
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