نتایج جستجو برای: landcover

تعداد نتایج: 566  

2009
Ujjwal Maulik Indrajit Saha

An important approach to unsupervised pixel classification in remote sensing satellite imagery is to use clustering in the spectral domain. The problem of classifying an image into different homogeneous regions is viewed as the task of clustering the pixels in the intensity space. In particular, satellite images contain landcover types some of which cover significantly large areas, while some (...

2003
Alex Henneguelle Joydeep Ghosh Melba M. Crawford

Prediction of landcover types from airborne/spaceborne sensors is an important classification problem in remote sensing. Due to recent advances in sensor technology, it is now possible to acquire hyperspectral data simultaneously in ∼200 bands, each of which measures the integrated response of a target over a narrow window of the electromagnetic spectrum. This unprecedented spectral resolution ...

2004
Yunhan Dong

APPROVED FOR PUBLIC RELEASE Land clutter issues and modelling from a perspective of L-band VV polarisation are addressed. In particular, clutter distributions in three different dimensions are discussed in detail. First a three-term model for the dependence of land clutter on grazing angle is proposed. The model is site-specific and landcover-dependent. Parameters for dominant types of landcove...

Journal: :Anais da Academia Brasileira de Ciências 2017

2017
Frédéric Ferraty Martin Paegelow Pascal Sarda

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Journal: :AI Commun. 2001
Christine Largouët Marie-Odile Cordier

This paper deals with the integration of domain knowledge to improve the landcover classification of a sequence of images. This new approach consists in representing the plot of land as a dynamic system and in modeling its evolution (knowledge about crop cycles, rotations and farmer practices) with the timed automata formalism. The main feature of this work is to improve the classification prov...

Journal: :CoRR 2014
T. Sarath G. Nagalakshmi

In present days remote sensing is most used application in many sectors. This remote sensing uses different images like multispectral, hyper spectral or ultra spectral. The remote sensing image classification is one of the significant method to classify image. In this state we classify the maximum likelihood classification with fuzzy logic. In this we experimenting fuzzy logic like spatial, spe...

Journal: :Nepalese journal of geoinformatics 2023

It is necessary to understand land cover changes for managing and monitoring natural resources development, especially urban planning. Remote sensing geographical information systems (GIS) are proven tools assessing use changes, which helps planners advance sustainability. Google Earth Engine used in this study detect one of the rapidly growing cities Nepal. was discovered that from 2013 2019, ...

Journal: :Geosciences 2021

During the past 25 ka, southern Ethiopia has undergone tremendous climatic changes, from dry and relatively cold during Last Glacial Maximum (LGM, 25–18 ka) to African Humid Period (AHP, 15–5 ka), back present-day conditions. As a contribution better understand effects of climate change on vegetation lakes, we here present new Predictive Vegetation Model that is linked with Lake Balance availab...

2016
Pawel K. Misztal Jeremy C. Avise Thomas Karl Klaus Scott Haflidi H. Jonsson Alex B. Guenther Allen H. Goldstein

Accurately modeled Biogenic Volatile Organic Compound (BVOC) emissions are an essential input to atmospheric chemistry simulations of ozone and particle formation. BVOC emission models rely on Basal Emission Factor (BEF) distribu5 tion maps based on emission measurements and vegetation landcover data but these critical input components of the models as well as model simulations lack validation ...

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