Critical Metadata for Spectroscopy Field Campaigns

Rasaiah, Barbara A.; Jones, Simon; Bellman, Chris; Malthus, Tim J.

doi:10.3390/rs6053662

Cited by 22 publications

(33 citation statements)

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“…Este protocolo se replicó sistemáticamente en distintos individuos para medir el grado de variabilidad de la especie. En la Figura 1 se presenta un esquema gráfico del experimento, definiendo condiciones instrumentales estandarizadas en la literatura tales como la altura del sensor a la muestra, el ángulo de geometría de visión y el tipo de arreglo de la muestra vegetal (Milton et al, 2009;Rasaiah et al, 2014). En este trabajo se utilizó un espectro radiómetro portátil Analitycal Spectral Devices Hand Held (ASD), abarcando la región del visible (VIS) e infrarrojo cercano (NIR; en conjunto VNIR; 325-1075 nm).…”

Section: Protocolo De Adquisiciónunclassified

“…Para cada muestra vegetal se registraron diez espectros consecutivos, los cuales fueron procesados para generar una firma espectral promedio a través de la distribución estadística T-Student. Adicionalmente, cada firma espectral posee un mejor metadato instrumental para asegurar la comparación e interoperabilidad en el tiempo con otras librerías espectrales tales como la propuesta por Rasaiah et al (2014).…”

Section: Muestras Vegetales De Quillayunclassified

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Caracterización espectral de Quillaja saponaria (Mol.)

2016

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Resumen: En este trabajo se presenta una caracterización de la reflectancia espectral de Quillaja saponaria (Mol.), especie endémica de Chile y principalmente valorada por los servicios ecosistémicos que brinda a la sociedad así como su elevada concentración de saponinas en la corteza, utilizada como insumo en la industria farmacéutica. Para la caracterización espectral se diseñó un protocolo de adquisición de firmas espectrales foliares, controlando pará-metros instrumentales y ambientales. Se evaluó el comportamiento espectral y el grado de variabilidad de la especie en el rango del visible e infrarrojo cercano (VNIR; 400-990 nm) con dos sensores hiperespectrales (ASD HH y cámara PDF-65-V10E). Las firmas espectrales obtenidas con el ASD HH mostraron una variación inferior al 5% de reflectancia en el VNIR y en menor medida en la zona de transición del visible al infrarrojo cercano (red-edge; 680-730 nm). Además, se detectaron dos rasgos espectrales distintivos de la especie, el primero se relaciona con un incremento rápido de la reflectancia en los 450-480 nm y el segundo, un decrecimiento entre los 920-970 nm relacionado con las bandas de absorción de agua. De hecho, al medir la reflectancia de un conjunto de ramas apiladas, éstos rasgos perduran pero con una menor magnitud, indicando un patrón espectral característico y eventualmente utilizable en campañas de monitoreo del estado físico y sanitario de la especie mediante teledetección. Usando la cámara PDF-65 se estudió el vigor de las hojas bajo diferentes condiciones sanitarias (sana, enferma, muerta) a través de los índices espectrales de vegetación. Entre los resultados, el índice PSRI (Plant Senescence Reflectance Index) detecta sectores de bajo vigor fotosintético y el TVI (Triangular Vegetation Index) permite una caracterización gradual de cada condición. Este trabajo presenta la primera referencia espectral para una de las especies de bosque esclerófilo más importante de Chile.Palabras clave: Quillaja saponaria, Chile, PSRI, Protocolo. Spectral characterization of Quillaja saponaria (Mol.)Abstract: This paper presents a spectral reflectance characterization of the specie Quillaja saponaria (Mol.), endemic tree of Chile and valued by society due to its provision of several ecosystem services that gives to society and also for its high concentration of saponins in cortex widely used in the pharmacological industry. For spectral characterization a foliar spectral signatures protocol was designed which included standardized instrumental and environmental parameters. The spectral response of different individuals was measured to evaluate the spectral behaviour and degree of variability within species in the visible and near infrared ranges (VNIR; 400-990 nm) with two hyperspectral sensors (ASD HH and camera PDF-65-V10E). The resulting spectral signatures obtained with ASD HH showed a variation less than 5% of reflectance in VNIR and lesser than that in the transition zone from red to near infrared (red-edge; 680-730 nm). Additionally, two distinctive spect...

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Section: Protocolo De Adquisiciónunclassified

Section: Muestras Vegetales De Quillayunclassified

Caracterización espectral de Quillaja saponaria (Mol.)

2016

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“…Interoperability of field spectroscopy metadata is central to facilitating common platforms for sharing field spectroscopy datasets within the remote sensing community [1][2][3][4][5][6]. A field spectroscopy metadata standard is defined as those data elements that explicitly document the spectroscopy dataset and field protocols, sampling strategies, instrument properties and environmental and logistical variables [5].…”

Section: The Importance Of Interoperable Field Spectroscopy Metadatasetsmentioning

confidence: 99%

“…A field spectroscopy metadata standard is defined as those data elements that explicitly document the spectroscopy dataset and field protocols, sampling strategies, instrument properties and environmental and logistical variables [5]. A metadata standard in general supports dataset-related functions (e.g., identification, discovery, administration, version control) built on a framework of specific categories of defined metadata elements [7].…”

Section: The Importance Of Interoperable Field Spectroscopy Metadatasetsmentioning

confidence: 99%

Towards an Interoperable Field Spectroscopy Metadata Standard with Extended Support for Marine Specific Applications

et al. 2015

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This paper presents an approach to developing robust metadata standards for specific applications that serves to ensure a high level of reliability and interoperability for a spectroscopy dataset. The challenges of designing a metadata standard that meets the unique requirements of specific user communities are examined, including in situ measurement of reflectance underwater, using coral as a case in point. Metadata schema mappings from seven existing metadata standards demonstrate that they consistently fail to meet the needs of field spectroscopy scientists for general and specific applications (μ = 22%, σ = 32% conformance with the core metadata requirements and μ = 19%, σ = 18% for the special case of a benthic (e.g., coral) reflectance metadataset). Issues such as field measurement methods, instrument calibration, and data representativeness for marine field spectroscopy campaigns are investigated within the context of submerged benthic measurements. The implication of semantics and syntax for a robust and flexible metadata standard are also considered. A hybrid standard that serves as a "best of breed" incorporating useful modules and parameters within the standards is proposed. This paper is Part 3 in a series of papers in this journal, examining the issues central to a metadata standard for field spectroscopy datasets. The results presented in this paper are an important step towards field spectroscopy metadata standards that address the specific needs of field OPEN ACCESSRemote Sens. 2015, 7 15669 spectroscopy data stakeholders while facilitating dataset documentation, quality assurance, discoverability and data exchange within large-scale information sharing platforms.

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“…These requirements were identified in an international experiment comprising a web-based survey [2] and an expert panel evaluation [3,4] that investigated protocols for recording metadata in field spectroscopy (see Figure 1).…”

Section: Building a Metadata Standardmentioning

confidence: 99%

Approaches to establishing a metadata standard for field spectroscopy datasets

Rasaiah

Malthus

Bellman

et al. 2013

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS

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There is an urgent need within the international remote sensing community to establish a metadata standard for field spectroscopy that ensures high quality, interoperable metadata sets that can be archived and shared efficiently within Earth observation data sharing systems. Careful examination of all stages of metadata collection and analysis can inform a robust standard that is applicable to a range of field campaigns. This paper presents approaches towards a standard that encompasses in situ metadata collection and initiatives towards sharing metadata within intelligent archiving systems.

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Critical Metadata for Spectroscopy Field Campaigns

Cited by 22 publications

References 10 publications

Caracterización espectral de Quillaja saponaria (Mol.)

Caracterización espectral de Quillaja saponaria (Mol.)

Towards an Interoperable Field Spectroscopy Metadata Standard with Extended Support for Marine Specific Applications

Approaches to establishing a metadata standard for field spectroscopy datasets

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