On the Development of Map Projections Kig 2007, Special Issue
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Mercator-15Dec2015.Pdf
THE MERCATOR PROJECTIONS THE NORMAL AND TRANSVERSE MERCATOR PROJECTIONS ON THE SPHERE AND THE ELLIPSOID WITH FULL DERIVATIONS OF ALL FORMULAE PETER OSBORNE EDINBURGH 2013 This article describes the mathematics of the normal and transverse Mercator projections on the sphere and the ellipsoid with full deriva- tions of all formulae. The Transverse Mercator projection is the basis of many maps cov- ering individual countries, such as Australia and Great Britain, as well as the set of UTM projections covering the whole world (other than the polar regions). Such maps are invariably covered by a set of grid lines. It is important to appreciate the following two facts about the Transverse Mercator projection and the grids covering it: 1. Only one grid line runs true north–south. Thus in Britain only the grid line coincident with the central meridian at 2◦W is true: all other meridians deviate from grid lines. The UTM series is a set of 60 distinct Transverse Mercator projections each covering a width of 6◦in latitude: the grid lines run true north–south only on the central meridians at 3◦E, 9◦E, 15◦E, ... 2. The scale on the maps derived from Transverse Mercator pro- jections is not uniform: it is a function of position. For ex- ample the Landranger maps of the Ordnance Survey of Great Britain have a nominal scale of 1:50000: this value is only ex- act on two slightly curved lines almost parallel to the central meridian at 2◦W and distant approximately 180km east and west of it. The scale on the central meridian is constant but it is slightly less than the nominal value. -
5–21 5.5 Miscellaneous Projections GMT Supports 6 Common
GMT TECHNICAL REFERENCE & COOKBOOK 5–21 5.5 Miscellaneous Projections GMT supports 6 common projections for global presentation of data or models. These are the Hammer, Mollweide, Winkel Tripel, Robinson, Eckert VI, and Sinusoidal projections. Due to the small scale used for global maps these projections all use the spherical approximation rather than more elaborate elliptical formulae. 5.5.1 Hammer Projection (–Jh or –JH) The equal-area Hammer projection, first presented by Ernst von Hammer in 1892, is also known as Hammer-Aitoff (the Aitoff projection looks similar, but is not equal-area). The border is an ellipse, equator and central meridian are straight lines, while other parallels and meridians are complex curves. The projection is defined by selecting • The central meridian • Scale along equator in inch/degree or 1:xxxxx (–Jh), or map width (–JH) A view of the Pacific ocean using the Dateline as central meridian is accomplished by running the command pscoast -R0/360/-90/90 -JH180/5 -Bg30/g15 -Dc -A10000 -G0 -P -X0.1 -Y0.1 > hammer.ps 5.5.2 Mollweide Projection (–Jw or –JW) This pseudo-cylindrical, equal-area projection was developed by Mollweide in 1805. Parallels are unequally spaced straight lines with the meridians being equally spaced elliptical arcs. The scale is only true along latitudes 40˚ 44' north and south. The projection is used mainly for global maps showing data distributions. It is occasionally referenced under the name homalographic projection. Like the Hammer projection, outlined above, we need to specify only -
GLOSSARIO AGTC Astro-Geo-Topo-Cartografico Di Michele T
GLOSSARIO AGTC Astro-Geo-Topo-Cartografico di Michele T. Mazzucato Ultimo aggiornamento del 2021_1007 2 Il dubbio è l’inizio della conoscenza. René Descartes (Cartesio) (1596-1650) Esiste un solo bene, la conoscenza, e un solo male, l’ignoranza. Socrate (470-399 a.C.) GLOSSARIO AGTC 3 Una raccolta di termini specialistici, certamente non esaustiva per vastità, riguardanti le Scienze Geodetiche e Topografiche derivanti dalle quattro discipline fondamentali: astronomia, geodesia, topografia e cartografia. Michele T. Mazzucato Michele T. Mazzucato 4 I N D I C E A ▲indice▲ angolo di inclinazione aberrazione astronomica angolo di posizione aberrazione della luce angolo nadirale aberrazione stellare angolo orario aberrazioni ottiche angolo orizzontale accelerazione di Coriolis angolo polare accelerazione di gravità teorica angolo verticale accuratezza angolo zenitale acromatico anno acronico anno bisestile adattamento al buio anno civile adattamento alla distanza anno luce aerofotogrammetria anno lunare afelio anno platonico afilattiche anno siderale agonica anno solare agrimensore anno tropico agrimensura anomalia della gravità airglow anomalie gravimetriche alba anomalia orbitale albedo antimeridiano di Greenwich albion antimeridiano terrestre alidada apoastro allineamento apocromatico almucantarat apogeo altezza apparente aposelenio altezza del Sole apozenit altezza di un astro apparato basimetrico altezza reale apparato di Bessel altezza sustilare apparato di Borda altimetria apparato di Boscovich altimetria laser apparato di Colby altimetro -
A Bevy of Area Preserving Transforms for Map Projection Designers.Pdf
Cartography and Geographic Information Science ISSN: 1523-0406 (Print) 1545-0465 (Online) Journal homepage: http://www.tandfonline.com/loi/tcag20 A bevy of area-preserving transforms for map projection designers Daniel “daan” Strebe To cite this article: Daniel “daan” Strebe (2018): A bevy of area-preserving transforms for map projection designers, Cartography and Geographic Information Science, DOI: 10.1080/15230406.2018.1452632 To link to this article: https://doi.org/10.1080/15230406.2018.1452632 Published online: 05 Apr 2018. Submit your article to this journal View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=tcag20 CARTOGRAPHY AND GEOGRAPHIC INFORMATION SCIENCE, 2018 https://doi.org/10.1080/15230406.2018.1452632 A bevy of area-preserving transforms for map projection designers Daniel “daan” Strebe Mapthematics LLC, Seattle, WA, USA ABSTRACT ARTICLE HISTORY Sometimes map projection designers need to create equal-area projections to best fill the Received 1 January 2018 projections’ purposes. However, unlike for conformal projections, few transformations have Accepted 12 March 2018 been described that can be applied to equal-area projections to develop new equal-area projec- KEYWORDS tions. Here, I survey area-preserving transformations, giving examples of their applications and Map projection; equal-area proposing an efficient way of deploying an equal-area system for raster-based Web mapping. projection; area-preserving Together, these transformations provide a toolbox for the map projection designer working in transformation; the area-preserving domain. area-preserving homotopy; Strebe 1995 projection 1. Introduction two categories: plane-to-plane transformations and “sphere-to-sphere” transformations – but in quotes It is easy to construct a new conformal projection: Find because the manifold need not be a sphere at all. -
Front Matter (PDF)
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON. (B.) FOR THE YEAR MDCCCLXXXVII. VOL. 178. LONDON: PRINTED BY HARRISON AND SONS, ST. MARTIN’S LANE, W C., printers in Ordinary to Her Majesty. MDCCCLXXXVIII. ADVERTISEMENT. The Committee appointed by the Royal Society to direct the publication of the Philosophical Transactions take this opportunity to acquaint the public that it fully appears, as well from the Council-books and Journals of the Society as from repeated declarations which have been made in several former , that the printing of them was always, from time to time, the single act of the respective Secretaries till the Forty-seventh Volume; the Society, as a Body, never interesting themselves any further in their publication than by occasionally recommending the revival of them to some of their Secretaries, when, from the particular circumstances of their affairs, the Transactions had happened for any length of time to be intermitted. And this seems principally to have been done with a view to satisfy the public that their usual meetings were then continued, for the improvement of knowledge and benefit of mankind : the great ends of their first institution by the Boyal Charters, and which they have ever since steadily pursued. But the Society being of late years greatly enlarged, and their communications more numerous, it was thought advisable that a Committee of their members should be appointed to reconsider the papers read before them, and select out of them such as. they should judge most proper for publication in the future Transactions; which was accordingly done upon the 26th of March, 1752. -
Representations of Celestial Coordinates in FITS
A&A 395, 1077–1122 (2002) Astronomy DOI: 10.1051/0004-6361:20021327 & c ESO 2002 Astrophysics Representations of celestial coordinates in FITS M. R. Calabretta1 and E. W. Greisen2 1 Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia 2 National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801-0387, USA Received 24 July 2002 / Accepted 9 September 2002 Abstract. In Paper I, Greisen & Calabretta (2002) describe a generalized method for assigning physical coordinates to FITS image pixels. This paper implements this method for all spherical map projections likely to be of interest in astronomy. The new methods encompass existing informal FITS spherical coordinate conventions and translations from them are described. Detailed examples of header interpretation and construction are given. Key words. methods: data analysis – techniques: image processing – astronomical data bases: miscellaneous – astrometry 1. Introduction PIXEL p COORDINATES j This paper is the second in a series which establishes conven- linear transformation: CRPIXja r j tions by which world coordinates may be associated with FITS translation, rotation, PCi_ja mij (Hanisch et al. 2001) image, random groups, and table data. skewness, scale CDELTia si Paper I (Greisen & Calabretta 2002) lays the groundwork by developing general constructs and related FITS header key- PROJECTION PLANE x words and the rules for their usage in recording coordinate in- COORDINATES ( ,y) formation. In Paper III, Greisen et al. (2002) apply these meth- spherical CTYPEia (φ0,θ0) ods to spectral coordinates. Paper IV (Calabretta et al. 2002) projection PVi_ma Table 13 extends the formalism to deal with general distortions of the co- ordinate grid. -
Cylindrical Projections 27
MAP PROJECTION PROPERTIES: CONSIDERATIONS FOR SMALL-SCALE GIS APPLICATIONS by Eric M. Delmelle A project submitted to the Faculty of the Graduate School of State University of New York at Buffalo in partial fulfillments of the requirements for the degree of Master of Arts Geographical Information Systems and Computer Cartography Department of Geography May 2001 Master Advisory Committee: David M. Mark Douglas M. Flewelling Abstract Since Ptolemeus established that the Earth was round, the number of map projections has increased considerably. Cartographers have at present an impressive number of projections, but often lack a suitable classification and selection scheme for them, which significantly slows down the mapping process. Although a projection portrays a part of the Earth on a flat surface, projections generate distortion from the original shape. On world maps, continental areas may severely be distorted, increasingly away from the center of the projection. Over the years, map projections have been devised to preserve selected geometric properties (e.g. conformality, equivalence, and equidistance) and special properties (e.g. shape of the parallels and meridians, the representation of the Pole as a line or a point and the ratio of the axes). Unfortunately, Tissot proved that the perfect projection does not exist since it is not possible to combine all geometric properties together in a single projection. In the twentieth century however, cartographers have not given up their creativity, which has resulted in the appearance of new projections better matching specific needs. This paper will review how some of the most popular world projections may be suited for particular purposes and not for others, in order to enhance the message the map aims to communicate. -
Map Projections
Map Projections Map Projections A Reference Manual LEV M. BUGAYEVSKIY JOHN P. SNYDER CRC Press Taylor & Francis Croup Boca Raton London New York CRC Press is an imprint of the Taylor & Francis Group, an informa business Published in 1995 by CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 1995 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group No claim to original U.S. Government works Printed in the United States of America on acid-free paper 1 International Standard Book Number-10: 0-7484-0304-3 (Softcover) International Standard Book Number-13: 978-0-7484-0304-2 (Softcover) This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information, but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. No part of this book may be reprinted, reproduced, transmitted, or utilized in any form by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information storage or retrieval system, without written permission from the publishers. Trademark Notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation without intent to infringe. Library of Congress Cataloging-in-Publication Data Catalog record is available from the Library of Congress Visit the Taylor & Francis Web site at http ://www. -
L I N E Ss P O I N T
Volume 26: Issue 3 July, 2015 LL II NN EE SS & PP OO II NN TT SS www.plsw.org THE EQUALITY STATE SURVEYOR PROFESSIONAL LAND SURVEYORS OF WYOMING Lines & Points 1|Page July 2015 Volume 26: Issue 3 July, 2015 L I N E S & P O I N T S www.plsw.org PAUL A. REID NSPS FINAL POINT MONUMENT President Sonja “Suzie” Sparks, PLS PHOTO BY IKE LAIM M F On The Cover THE EQUALITY STATE SURVEYOR President Elect Randall Stelzner, PLS PROFESSIONAL LAND SURVEYORS OF WYOMING Secretary/Treasurer Marlowe Scherbel, PLS CONTENTS Page 3 PRESIDENT’S MESSAGE Page 4 ANNOUNCEMENTS Cotton Jones, PLS Area Governor Page 5 GEODETIC SURVEYING: PART VII THE ACTIVITIES OF THE ORDNANCE SURVEY OF ENGLAND FROM 1800 TO ABOUT 1845 By: Herbert Stoughton, PhD, PELS, CP Mark Corbridge, PLS Wyoming Delegate Page 7 CELEBRATION OF LIFE IN MEMORY OF PAUL A. REID By: Mark Corbridge, PLS PUBLICATIONS COMMITTEE Page 11 THE LANDER TRAIL By: West Chapter of PLSW Committee Larry Perry, PLS Chair [email protected] Page 19 COMMON RESEARCH MISTAKES Editor Michael Flaim, PELS SURVEYORS MAKE in Chief [email protected] FORWARD SEARCH By: Knud E. Hermansen, PELS, PhD, Esq Treasurer John “Jack” Studley, PLS & Advertising [email protected] Page 21 ANOTHER UNIQUE MONUMENT Circulation Joel Ebner, PLS By: Joel Ebner, PLS [email protected] Emeritus Pete Hutchison, PELS Member [email protected] 2014 PLSW SUSTAINING MEMBERS Copy Herbert W. Stoughton, PhD, PELS, CP •Bryan Baker - Frontier Precision Inc. Editor [email protected] •John Baffert - Surv-KAP, LLC •Chris Farnsworth - RDO Integrated Controls Editor Steven “Dennis” Dawson, PLS •Kelly Goff - Underground Consulting Solutions at Large [email protected] •Susan Hall - Trimble Website Sonja “Suzie” Sparks, PLS •Tim Klaben - Berntsen International Inc. -
The Ordnance Survey and Airy's Figure of the Earth
Sheetlines The journal of THE CHARLES CLOSE SOCIETY for the Study of Ordnance Survey Maps “The Ordnance Survey and Airy’s figure of the earth” David L Walker Sheetlines, 119 (December 2020), pp6-17 Stable URL: https://s3.eu-west-2.amazonaws.com/sheetlines- articles/Issue119page6.pdf This article is provided for personal, non-commercial use only. Please contact the Society regarding any other use of this work. Published by THE CHARLES CLOSE SOCIETY for the Study of Ordnance Survey Maps www.CharlesCloseSociety.org The Charles Close Society was founded in 1980 to bring together all those with an interest in the maps and history of the Ordnance Survey of Great Britain and its counterparts in the island of Ireland. The Society takes its name from Colonel Sir Charles Arden-Close, OS Director General from 1911 to 1922, and initiator of many of the maps now sought after by collectors. The Society publishes a wide range of books and booklets on historic OS map series and its journal, Sheetlines, is recognised internationally for its specialist articles on Ordnance Survey-related topics. 6 The Ordnance Survey and Airy’s figure of the earth David L Walker The initial triangulation of Great Britain was marred by flawed estimates for the lengths of degrees that were used to calculate latitudes and longitudes.1 For about thirty years, the Ordnance ignored criticism of its 1795 estimate of the length of a degree perpendicular to the meridian, as described below. New estimates became available with the publication in 1830 of Airy’s figure of the earth (ie its shape and dimensions) and these were fairly soon adopted by Ordnance officers. -
5 Orbit and Ground Track of a Satellite
5 Orbit and Ground Track of a Satellite 5.1 Position of the Satellite on its Orbit Let (O; x, y, z) be the Galilean reference frame already defined. The satellite S is in an elliptical orbit around the centre of attraction O. The orbital plane P makes a constant angle i with the equatorial plane E. However, although this plane P is considered as fixed relative to in the Keplerian motion, in a real (perturbed) motion, it will in fact rotate about the polar axis. This is precessional motion,1 occurring with angular speed Ω˙ , as calculated in the last two chapters. A schematic representation of this motion is given in Fig. 5.1. We shall describe the position of S in using the Euler angles. 5.1.1 Position of the Satellite The three Euler angles ψ, θ and χ were introduced in Sect. 2.3.2 to specify the orbit and its perigee in space. In the present case, we wish to specify S. We obtain the correspondence between the Euler angles and the orbital elements using Fig. 2.1: ψ = Ω, (5.1) θ = i, (5.2) χ = ω + v. (5.3) Although they are fixed for the Keplerian orbit, the angles Ω, ω and M − nt vary in time for a real orbit. The inclination i remains constant, however. The distance from S to the centre of attraction O is given by (1.41), expressed in terms of the true anomaly v : a(1 − e2) r = . (5.4) 1+e cos v 1 The word ‘precession’, meaning ‘the action of preceding’, was coined by Coper- nicus around 1530 (præcessio in Latin) to speak about the precession of the equinoxes, i.e., the retrograde motion of the equinoctial points. -
Royal Engineers Journal. PUBLISHED QUARTERLY
U The Royal Engineers Journal. PUBLISHED QUARTERLY. § '1 iQ i zX, W'r I ' i i O,' X. .i nA MO4'; z I VOL. XXXIX. No. 4. DECEMBER, 1925. W ' CHATHAM: THE INSTITUTION OF ROYAL ENGINEERS. TELEPHONE: CHATHAM, 669. AGENTS: W. & J. MACHAY & Co. LTD. INSTITUTION OF RE OFFICE COPY iMENT All Co Mi l1. 1 .- DO NOT REMOVE I I 11s.. The CELEBRATED WHITE UNDERCOATING. One coat transor Black nto White. Ready or use n fie minutes. Can be second coated In a few hours. "MURALINE." THE PERFECT WATER PAINT. Sanitary, Artistic, Durable. Requires only the addition of water to make ready for use. In 40 shades. Sold in a dry powder. Pure Liquid Paint. Non-Poisonous. Ready for Use. Specially manufactured forthe finest interior and exterior decoration. Extensively used byCorporations, District Councils and Unions throughout the United Kingdom. In over 50 colours. "VITROLITE." A DECORATIVE WHITE PAINT. Superior to white lead in, colour, covering ; ~ power and durability. Specially suitable for Glasshouse painting and all interior and exterior wurk. Patterns, Prices, and full particularspost free. WALTER CARSON &SONS, GROVE WORKS, BATTERSEA, LONDON, ENGLAND. Irish Depot: BACHELORS WALK, DUBLIN. Telephones: Cables: "Carsons, London." BatterM 1630 (2 lIne). Codes: A.B.C. 4th & Sth Editions. - ADVERTISEMENTS. Much of the.tinmenow,wasted at International Conferences will :/!' be saved when the delegates learn to'speak and understand Foreign Languages by the New Pelman melhod. ih~- THE BEST WAY OF LEARNING LANGUAGES. Two Distinguished Generals Praise the New Method of Learning French, German, Italian and Spanish. Amongst those who strongly recommend the new Pelman method of learning Foreign Languages are Lieut.-Gen.