Baseline (surveying) (original) (raw)

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In surveying, a baseline is a line between two points on the earth's surface and the direction and distance between them. In a triangulation network, at least one baseline between two stations needs to be measured to calculate the size of the triangles by trigonometry. More specifically a baseline may be the line that divides a survey township between north and south.

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dbo:abstract In surveying, a baseline is a line between two points on the earth's surface and the direction and distance between them. In a triangulation network, at least one baseline between two stations needs to be measured to calculate the size of the triangles by trigonometry. In the United States Public Land Survey System, a baseline is the principal east-west line (i.e., a parallel) upon which all rectangular surveys in a defined area are based. The baseline meets its corresponding principal meridian at the point of origin, or initial point, for the land survey. For example, the baseline for Nebraska and Kansas is shared as the border for both states, at the 40th parallel north. More specifically a baseline may be the line that divides a survey township between north and south. (en) La línea de base, línea basal o estudio de base es la primera medición de todos los indicadores contemplados en el diseño de un y, por ende, permite conocer el valor de los indicadores al momento de iniciarse las acciones planificadas, es decir, establece el 'punto de partida' del proyecto o intervención.​ La línea de base suele tener un carácter cuantitativo y puede recurrir tanto a fuentes primarias (producidas ad-hoc) como a secundarias (por ejemplo: censos, estudios previos), pero se prefieren las fuentes primarias dado que muchas veces los proyectos de desarrollo conciernen a un escenario específico no contemplado por otros investigadores. Dentro del ciclo del proyecto, la línea de base debe realizarse cuando este se inicia; de lo contrario, no se contará con datos que permitan establecer comparaciones posteriores e indagar por los cambios ocurridos conforme el proyecto se vaya implementando.​ Asimismo, de no realizarse, se hacen menos confiables las posteriores evaluaciones de resultados y/o de impacto de un proyecto de desarrollo. El resultado de la línea base se expresa en un informe que describe la situación del problema identificado antes de la intervención del proyecto y la información elaborada se conoce como año base, punto de referencia o año cero.​ (es)
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dbo:wikiPageExternalLink https://web.archive.org/web/20081010234903/http:/www.blm.gov/cadastral/Manual/pdffiles/histrect.pdf https://web.archive.org/web/20081011172949/http:/www.blm.gov/wo/st/en/prog/more/cadastralsurvey/tools.html http://www.pmproject.org
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rdfs:comment In surveying, a baseline is a line between two points on the earth's surface and the direction and distance between them. In a triangulation network, at least one baseline between two stations needs to be measured to calculate the size of the triangles by trigonometry. More specifically a baseline may be the line that divides a survey township between north and south. (en) La línea de base, línea basal o estudio de base es la primera medición de todos los indicadores contemplados en el diseño de un y, por ende, permite conocer el valor de los indicadores al momento de iniciarse las acciones planificadas, es decir, establece el 'punto de partida' del proyecto o intervención.​ El resultado de la línea base se expresa en un informe que describe la situación del problema identificado antes de la intervención del proyecto y la información elaborada se conoce como año base, punto de referencia o año cero.​ (es)
rdfs:label Línea de base (investigación científica) (es) Baseline (surveying) (en)
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