Publicação
From the portolan chart of the mediterranean to the latitude chart of the atlantic
| Resumo: | In this thesis a methodology for the systematic geometric analysis and modeling of pre-Mercator nautical charts is proposed and tested, aiming at contributing to better understand their geometric properties and methods of construction. The suggested approach involves the application of a series of cartometric techniques: georeferencing, on the basis of a sample of control points of known geographic coordinates; the interpolation of the geographical graticules implicit to the representations; the assessment of scales of distance and latitude; the assessment of the navigational accuracy, by comparing the latitudes, directions and distances measured on the charts with the corresponding exact values, affected by magnetic declination; and the identification of the routes underlying the charts’ construction. A numerical model was developed using the concept of ‘multimensional scaling’, here generalized to distances and directions measured on a spherical Earth, to simulate the main geometric features of the charts. To estimate the spatial distribution of the magnetic declination in various times two sources were used: the historical observations made by D. João de Castro in 1538 and 1541, and a recent geomagnetic model. |
|---|---|
| Autores principais: | Gaspar, Joaquim Filipe Figueiredo Alves |
| Assunto: | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| Ano: | 2010 |
| País: | Portugal |
| Tipo de documento: | tese de doutoramento |
| Tipo de acesso: | acesso a metadados |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1868982580978647040 |
|---|---|
| author | Gaspar, Joaquim Filipe Figueiredo Alves |
| author_facet | Gaspar, Joaquim Filipe Figueiredo Alves |
| author_role | author |
| contributor_name_str_mv | Painho, Marco Octávio Trindade Domingues, Francisco Contente RUN |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Gaspar, Joaquim Filipe Figueiredo Alves\",\"Person.identifier.orcid\":\"0000-0001-8304-4583\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Painho, Marco Octávio Trindade Domingues, Francisco Contente RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Gaspar, Joaquim Filipe Figueiredo Alves |
| datacite.date.Accepted.fl_str_mv | 2010-09-21T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_14cb |
| datacite.subjects.subject.fl_str_mv | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| datacite.titles.title.fl_str_mv | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| dc.contributor.none.fl_str_mv | Painho, Marco Octávio Trindade Domingues, Francisco Contente RUN |
| dc.creator.none.fl_str_mv | Gaspar, Joaquim Filipe Figueiredo Alves |
| dc.date.Accepted.fl_str_mv | 2010-09-21T00:00:00Z |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/8631 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_14cb |
| dc.subject.none.fl_str_mv | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| dc.title.fl_str_mv | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_db06 |
| description | In this thesis a methodology for the systematic geometric analysis and modeling of pre-Mercator nautical charts is proposed and tested, aiming at contributing to better understand their geometric properties and methods of construction. The suggested approach involves the application of a series of cartometric techniques: georeferencing, on the basis of a sample of control points of known geographic coordinates; the interpolation of the geographical graticules implicit to the representations; the assessment of scales of distance and latitude; the assessment of the navigational accuracy, by comparing the latitudes, directions and distances measured on the charts with the corresponding exact values, affected by magnetic declination; and the identification of the routes underlying the charts’ construction. A numerical model was developed using the concept of ‘multimensional scaling’, here generalized to distances and directions measured on a spherical Earth, to simulate the main geometric features of the charts. To estimate the spatial distribution of the magnetic declination in various times two sources were used: the historical observations made by D. João de Castro in 1538 and 1541, and a recent geomagnetic model. |
| dirty | 0 |
| eu_rights_str_mv | metadataOnlyAccess |
| format | doctoralThesis |
| id | run_2dcb5f5fcb1e25bc2fdaeeebdeb5de97 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/8631 |
| inst_facet_str | urn:organizationAcronym:unl{{{_:::_}}}Universidade Nova de Lisboa |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/8631 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Gaspar, Joaquim Filipe Figueiredo Alves Gaspar, Joaquim Filipe Figueiredo Alves https://www.ciencia-id.pt/DE14-C75A-B0EC DE14-C75A-B0EC http://orcid.org/0000-0001-8304-4583 0000-0001-8304-4583 |
| publishDate | 2010 |
| repo_facet_str | urn:repositoryAcronym:run{{{_:::_}}}Repositório Institucional da UNL |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engporIn this thesis a methodology for the systematic geometric analysis and modeling of pre-Mercator nautical charts is proposed and tested, aiming at contributing to better understand their geometric properties and methods of construction. The suggested approach involves the application of a series of cartometric techniques: georeferencing, on the basis of a sample of control points of known geographic coordinates; the interpolation of the geographical graticules implicit to the representations; the assessment of scales of distance and latitude; the assessment of the navigational accuracy, by comparing the latitudes, directions and distances measured on the charts with the corresponding exact values, affected by magnetic declination; and the identification of the routes underlying the charts’ construction. A numerical model was developed using the concept of ‘multimensional scaling’, here generalized to distances and directions measured on a spherical Earth, to simulate the main geometric features of the charts. To estimate the spatial distribution of the magnetic declination in various times two sources were used: the historical observations made by D. João de Castro in 1538 and 1541, and a recent geomagnetic model.porFrom the portolan chart of the mediterranean to the latitude chart of the atlanticPersonalGaspar, Joaquim Filipe Figueiredo AlvesDSpacehttp://dspace.org/items/4eecb58d-3e9d-4796-a6a0-34af113b3f80DSpacehttp://dspace.org/items/4eecb58d-3e9d-4796-a6a0-34af113b3f80Figueiredo Alves GasparJoaquim FilipeCiência IDhttps://www.ciencia-id.ptDE14-C75A-B0ECORCIDhttp://orcid.org0000-0001-8304-4583Scopus Author IDhttps://www.scopus.com55241361600Painho, Marco Octávio TrindadeDomingues, Francisco ContenteHostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.ptURNurn:tid:1012083832010-09-212010-09-21T00:00:00ZHandlehttp://hdl.handle.net/10362/8631http://purl.org/coar/access_right/c_14cbmetadata only accessGeometricAnalysisMethodsConstructionCartometricGeomagnetic modelliteraturehttp://purl.org/coar/resource_type/c_db06doctoral thesis |
| spellingShingle | From the portolan chart of the mediterranean to the latitude chart of the atlantic Gaspar, Joaquim Filipe Figueiredo Alves Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| status | SINGLETON |
| subject.fl_str_mv | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| title | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| title_full | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| title_fullStr | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| title_full_unstemmed | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| title_short | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| title_sort | From the portolan chart of the mediterranean to the latitude chart of the atlantic |
| topic | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| topic_facet | Geometric Analysis Methods Construction Cartometric Geomagnetic model |
| url | http://hdl.handle.net/10362/8631 |
| visible | 1 |