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Auteur Martina Triplat Horvat |
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Determination of definitive standard parallels of normal aspect conic projections equidistant along meridians on an old map / Martina Triplat Horvat in International journal of cartography, vol 1 n° 1 (August 2015)
[article]
Titre : Determination of definitive standard parallels of normal aspect conic projections equidistant along meridians on an old map Type de document : Article/Communication Auteurs : Martina Triplat Horvat, Auteur ; Miljenko Lapaine, Auteur Année de publication : 2015 Article en page(s) : pp 32 - 44 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections
[Termes IGN] carte ancienne
[Termes IGN] parallèle
[Termes IGN] projection conique
[Termes IGN] projection équidistanteRésumé : (auteur) In previous research we proved that meridians are straight lines and parallels are arcs of concentric circles on the map Nuova carta geografica dello Stato Ecclesiastico by J. R. Bošković and Ch. Maire, published in 1755. We also proved that the map was produced in a normal aspect conic projection equidistant along meridians. Knowing the map projection type is not enough. We need to know its parameters, too. In the first part of the paper, we described the procedure of determining standard parallels of the normal aspect conic projection equidistant along meridians. We proposed a procedure for determining projection parameters of an old map, especially its standard parallels, if the radius of the sphere in which the map was produced in is unknown. Constant C is introduced as a ratio of constant K and sphere radius R, both of which are unknown. The procedure is illustrated on the map Nuova carta … . Using the procedure, we obtained standard parallels φ1 = 41°50'N and φ2 = 44°30'N. In addition, we tested whether the obtained standard parallels are actually standard parallels in which the map was produced and determined the definitive standard parallels in which the map Nuova carta … has been produced. Numéro de notice : A2015-2574 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/23729333.2015.1055645 En ligne : https://doi.org/10.1080/23729333.2015.1055645 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76886
in International journal of cartography > vol 1 n° 1 (August 2015) . - pp 32 - 44[article]