Comparison of fractal dimensions based on segmented NDVI fields obtained from different remote sensors.

Alonso, Carmen and Benito Zafrilla, Rosa Maria and Tarquis Alfonso, Ana Maria (2012). Comparison of fractal dimensions based on segmented NDVI fields obtained from different remote sensors.. In: "Geophysical Research AbstractsVol. 14", 22/04/2012 - 27/04/2012, Viena, Austria. p. 1.

Description

Title: Comparison of fractal dimensions based on segmented NDVI fields obtained from different remote sensors.
Author/s:
  • Alonso, Carmen
  • Benito Zafrilla, Rosa Maria
  • Tarquis Alfonso, Ana Maria
Item Type: Presentation at Congress or Conference (Article)
Event Title: Geophysical Research AbstractsVol. 14
Event Dates: 22/04/2012 - 27/04/2012
Event Location: Viena, Austria
Title of Book: 9th EGU General Assembly
Date: 2012
Volume: 14
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Satellite image data have become an important source of information for monitoring vegetation and mapping land cover at several scales. Beside this, the distribution and phenology of vegetation is largely associated with climate, terrain characteristics and human activity. Various vegetation indices have been developed for qualitative and quantitative assessment of vegetation using remote spectral measurements. In particular, sensors with spectral bands in the red (RED) and near-infrared (NIR) lend themselves well to vegetation monitoring and based on them [(NIR - RED) / (NIR + RED)] Normalized Difference Vegetation Index (NDVI) has been widespread used. Given that the characteristics of spectral bands in RED and NIR vary distinctly from sensor to sensor, NDVI values based on data from different instruments will not be directly comparable. The spatial resolution also varies significantly between sensors, as well as within a given scene in the case of wide-angle and oblique sensors. As a result, NDVI values will vary according to combinations of the heterogeneity and scale of terrestrial surfaces and pixel footprint sizes. Therefore, the question arises as to the impact of differences in spectral and spatial resolutions on vegetation indices like the NDVI. The aim of this study is to establish a comparison between two different sensors in their NDVI values at different spatial resolutions.

More information

Item ID: 19746
DC Identifier: http://oa.upm.es/19746/
OAI Identifier: oai:oa.upm.es:19746
Official URL: http://www.geophysical-research-abstracts.net/volumes.html
Deposited by: Memoria Investigacion
Deposited on: 27 Sep 2013 18:29
Last Modified: 21 Apr 2016 21:05
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