Results 271 to 280 of about 58,425 (309)
Some of the next articles are maybe not open access.
The reliability of vegetation indices for monitoring saltmarsh vegetation cover
International Journal of Remote Sensing, 1997The dynamic nature of saltmarshes poses a challenge for coastal zone monitoring; natural variability in the sediment reflectance and atmospheric visibility within saltmarsh environment affects the reliability of regression relations between vegetation cover and vegetation indices.
J. A. Eastwood +3 more
openaire +1 more source
Probability and performance of vegetation indices
spie newsroom, 2007A vegetation index (VI) is expressed as the ratio of reflectance of an object at the near infrared (x) to its reflectance at the visible red (y) band. It can also be given as a function of this ratio or the ratio of the linear combinations of x and y. VIs are used in mapping vegetation cover with satellite imagery, with high and low values reflecting ...
openaire +1 more source
Effects of shadows on vegetation indices
IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium, 2002An important methodology in the remote sensing of biophysical variables is the use of Spectral Vegetation Indices (SVI). An SVI is an algebraic combination of reflectance values from different wavelength bands to produce a single value. Two SVI are evaluated for their usefulness in determining the Fraction of Absorbed Photosynthetically Active ...
openaire +1 more source
Vegetation as an Indicator of Geologic Formations
AAPG Bulletin, 1931ABSTRACT Although there are exceptions, plants are commonly found to be as indicative of the formation on which they grow as are the fossils in the rocks. The most important reason for using vegetation is that contacts between formations may be mapped at a distance of several miles, because a decided change in the vegetation is ...
openaire +1 more source
Vegetation indices for Landsat images
Proceeding of Southwest Symposium on Image Analysis and Interpretation, 2002Satellite-based remote sensing of vegetation densities is a growing technology with great future potential owing to the proliferation of increasingly sophisticated space-based sensors and the computational tools required to analyze the wealth of data. We explore algorithms that create vegetation mappings from the satellite image data.
openaire +1 more source
Radar vegetation indices for monitoring surface vegetation: Developments, challenges, and trends
Science of The Total EnvironmentMonitoring surface vegetation is essential for environmental protection, disaster prevention, and carbon sequestration in forests. However, optical remote-sensing methods and their derivative technologies typically fail to fully meet this requirement due to constraints such as lighting and weather.
Xueqian, Hu +7 more
openaire +2 more sources
Toward Standardization of Vegetation Indices
Toward Standardization of Vegetation ...Steven, Michael D. +2 more
openaire +2 more sources