Thomas Michael Bücher

Von der Kugel auf die Ebene - Unsere Erde im Kartenbild. Raumkörper Erde: Die Erde ist ein genähert kugelförmiger Raumkörper. Kugeln haben eine allseits gewölbte Oberfläche. Das Gradnetz: Mit einem Netz aus Längen- und Breitenkreisen ist jeder Punkt auf der Kugeloberfläche festlegbar. Vereinfachtes Erdmodell: Der Globus ist das dreidimensionale, vereinfachte und verkleinerte Abbild der Erde. Er gibt alle Flächen, Formen und Winkel ausreichend genau wieder. Durch Aufklappen auf die Ebene... Soll eine Kugeloberfläche in der Ebene abgebildet werden, muss man sie 'aufklappen' wie die Schale einer Orange. Das geht nicht ohne Stauchen und Dehnen. ... zur sternförmigen Planisphäre. Das verkleinerte Abbild der gesamten Erdoberfläche auf der Ebene heißt Planisphäre. Sie wird mathematisch berechnet und kann, je nach Verwendungszweck, verschiedene Formen annehmen.

Born from the rapid growth of the collector coin market, this new edition offers up-to-date listings for new releases worldwide including the latest 21st century innovations in world mint products.

This new edition of the ultimate gold coins book gives you facts, photos and prices you can use to make solid investments and accurate assessment of coins. In today's volatile gold coins market, there's a lot of opportunities to take advantage of, and equally as many chances where you can be taken advantage of. Make your mark in the market with this gold guide. With four centuries of gold, platinum and palladium coins, this book is: An essential reference for the collector of world gold coins A premium source of the gold coin investor Values for more than four hundred years of gold coins All the types, all their dates of issue, full weights and measures, with valuations true to today's record high gold market; this is a catalog you cannot afford to be without.

Serious collectors of paper money know to be successful you need to have the latest news and details, and no other guide provides worldwide secondary market values except the Standard Catalog of World Paper Money. That kind of attention to essential details can mean the difference between your next great buy or a so-so deal. With more than 12,000 photos, including an 8-page color section, and pricing in three grades of preservation, this guide is your gateway to profitable assessment and identification of world-bank notes.

-American Numismatic Association -- the largest numismatic organization in the world -- boasts a membership of 30,000+ -Sales of Standard Catalog of World Coins annually top more than 20,000 copies The mammoth Standard Catalog of World Coins, 1901-Present is worth its weight in information and up-to-date pricing. This one volume covers the past and the present in 50,000+ illustrations and more than one million current prices. For world coin collectors serious about their collecting, especially in today's active market, this book offers: -Comprehensive listing of all current Euro coins -Up-to-date pricing in up to five grades of condition to aid collectors in keeping collections current -More than 50,000 fully updated obverse and reverse illustrations -Reference materials such as a currency conversion schedule, sizing chart, guides for translating foreign languages, and bullion value charts