Results 21 to 30 of about 1,287 (187)

Spatial Structure Explains Morphological Variation Better Than Climatic Gradients in the South American Rattlesnake (<i>Crotalus durissus</i>). [PDF]

open access: yesEcol Evol
We evaluated whether climatic gradients or spatial structure better explain body size variation in the South American rattlesnake (Crotalus durissus) across its wide geographic range. After explicitly accounting for spatial autocorrelation, climatic variables were not significant predictors of body size in either sex, whereas sex‐specific spatial ...
Otani M   +3 more
europepmc   +2 more sources

Assessment of SIRGAS-CON tropospheric products using ERA5 and IGS

open access: yesJournal of Geodetic Science, 2022
Zenith Tropospheric Delays (ZTDs) are used to correct tropospheric effects that cause a delay in the signal measured by Global Navigation Satellite Systems (GNSS) receivers and obtain accurate measurements.
Prado Anderson   +2 more
doaj   +1 more source

Desarrollo de estrategias para integración de las Redes Verticales de América del Sur con base en los términos de referencia SIRGAS/GGOS/IAG

open access: yesRevista Cartográfica, 2018
Los Sistemas Verticales de Referencia (SVRs) junto con sus materializaciones nacionales, regionales y globales, se encuentran en una evolución significativa en los últimos años debido a que son fundamentales para el monitoreo de procesos físicos ...
Andrea Galudht Santacruz Jaramillo
doaj   +1 more source

Red geodésica GNSS de vínculo entre el datum dinámico SIRGAS y el sistema CR05 de Costa Rica

open access: yesUniciencia, 2016
Antes de la aparición de las técnicas de posicionamiento, la mayoría de los países consideraban suficientes la utilización de sistemas de referencia definidos localmente para la georreferenciación de actividades topográficas y cartográficas. Sin embargo,
María José Rivas-Guzmán   +1 more
doaj   +1 more source

Guías SIRGAS

open access: yes, 2009
El dataset contiene las guías actualizadas de SIRGAS, según los últimos estándares IGS asociados a la actualización de ITRF 2014 a ITRF 2020 (IGS20).
Sonia, Alves Costa   +3 more
core   +1 more source

Índice de vulnerabilidade ambiental do município de Eunápolis-BA

open access: yesRevista de Geografia (Recife), 2022
O artigo tem como objetivo realizar o mapeamento da vulnerabilidade ambiental do município de Eunápolis, situado no Território de Identidade da Costa do Descobrimento, no sul do estado da Bahia.
Jeorge Luis Martins de Oliviera   +2 more
doaj   +1 more source

Integração de Redes GNSS locais ao SIRGAS

open access: yes, 2009
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Pós-graduação em Ciências Cartográficas - FCTA característica continental do Brasil implica na necessidade de constantes desafios científicos em pesquisas espaciais e tecnológicas, que ...
Chuerubim, Maria Lígia
core   +3 more sources

Morphometric Relationships, Condition Indices and Size‐Dependent Morphometric Shifts in Four Lobster Species From Southeastern Brazil

open access: yesAquaculture, Fish and Fisheries, Volume 6, Issue 5, October 2026.
ABSTRACT Reliable morphometric relationships are essential for integrating fisheries datasets collected under different sampling protocols, yet regional information remains scarce for several commercially exploited Brazilian lobsters. We quantified species‐ and sex‐specific morphometric relationships for four commercially important lobster species ...
Rodrigo Barreto   +6 more
wiley   +1 more source

Uso de Geotecnologias e AHP na Identificação de Áreas Propícias à Implantação de Aterro Sanitário [PDF]

open access: yesAnuário do Instituto de Geociências, 2020
O objetivo dessa pesquisa é identificar áreas adequadas para a construção de aterro sanitário, usando geotecnologias, buscando eliminar/minimizar os problemas ambientais deles decorrentes.
Nathália Ferreira Alves   +2 more
doaj   +1 more source

Morphological Changes and Alterations in Erosion–Accretion Patterns in a Semiarid Brazilian River

open access: yesEarth Surface Processes and Landforms, Volume 51, Issue 9, September 2026.
Flow regulation by the Castanhão Dam significantly altered discharge dynamics and reduced sediment transport in the Jaguaribe River. Long‐term analysis (1958–2025) reveals attenuated flood peaks, decreased channel migration and progressive downstream stabilisation, highlighting persistent geomorphic adjustments in a regulated semiarid fluvial system ...
Andrea Almeida Cavalcante   +2 more
wiley   +1 more source

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