Ptolemy's Methodological Principles in the Creation of His Map Projections
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- Category: Historia de la Marina Civil
- Published on Tuesday, 25 November 2025 20:02
- Written by Administrator2
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https://link.springer.com/article/10.1007/s42489-022-00101-x
Abstract
Ptolemy developed instructions for three projections, but only the first two projections were used in practice. These instructions, which contributed significantly to the development of theoretical cartography, did not explicitly describe the methodological basis on which they were elaborated. The derivation of the data used in the instructions thus remained partly unclear, such as the localisation of the centre of the latitude circles in the first projection. Here, an attempt was made to reconstruct Ptolemy's methodological principles. It turned out that he used a simple but ingenious method that made it possible to create all projections without trigonometric calculations, only with the use of compass (instrument to construct circles) and ruler.
Zusammenfassung
Ptolemäus erstellte Anleitungen zu drei Projektionen, wobei nur die ersten
COMENTARIOS SOBRE EL GALEÓN SAN JUAN
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- Category: Historia de la Marina Civil
- Published on Monday, 24 November 2025 17:54
- Written by Administrator2
- Hits: 175
El Documento esta redactado y documentado para ser incluido dentro del contexto general de la historia de la marina civil por la nueva información recuperada del estudio y análisis de naufragios de navíos históricos que pueden contribuir a clarificar conceptos del pasado que nos ayuden a comprender la mejor forma de proceder de cara al futuro, sobre todo en otro momento trascendental de la historia global, (su aportación documental técnica y/o histórica resulta trascendental, para completar una vision transversal global y justa)...
Galeón. Ribadeo (1597)
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- Category: Historia de la Marina Civil
- Published on Monday, 24 November 2025 15:19
- Written by Administrator2
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https://shiplib.org/index.php/shipwrecks/iberian-
shipwrecks/spanish-armadas/ribadeo/
Miguel San Claudio, Ana Crespo, Nigel Nayling, Arnaud Cazenave de la Roche y Filipe Castro
Sigue este proyecto en facebook, página de Ainhoa López Formadela .
Patrocinado por
Instituto de Arqueología Náutica
* Autoridad Portuaria de Galicia
* Administración del Patrimonio Cultural de Galicia
* Real Club Náutico de Ribadeo
* Asociación Amigos del Galeón de Ribadeo
* ForSEAdiscovery (Acuerdo de subvención UE nº: 607545)
Nota de AEMC: ¿Por qué las Escuelas Superiores de la Marina Civil no forman parte de este proyecto de un barco que pertenece a una etapa histórica en la que la Marina Civil tenía un protagonismo indiscutible?
El gobierno "capitanofóbico" de Rajoy, la Ley de Navegación Marítima (2014) y la presión de los de siempre, podrían explicarlo.
Solving a Sunken Mystery: The Investigation and Identification of a Sixteenth-Century Shipwreck
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- Category: Historia de la Marina Civil
- Published on Sunday, 23 November 2025 22:55
- Written by Administrator2
- Hits: 134
https://eprints.hud.ac.uk/id/eprint/34148/1/FINAL%20THESIS%20-%20MALCOM.pdf
In the summer of 1991, St. Johns Expeditions, a Florida-based marine salvage company, discovered a shipwreck buried behind a shallow reef along the western edge of the Little Bahama Bank. The group contacted archaeologists to ascertain the significance of the discovery, and it was soon determined to be a Spanish ship dating to the 1500’s. The investigation of the shipwreck was entrusted to the author, working for the Mel Fisher Maritime Heritage Society (MFMHS), a not-for-profit research center based in Key West, Florida. Under the agreement, the collection of recovered materials will remain as an intact collection housed in both Key West and The Bahamas.
Between 1992 and 1999, the MFMHS conducted six excavations to examine