The Impacts of Spatial Resolution, Viewing Angle, and Spectral Vegetation Indices on the Quantification of Woody Mediterranean Species Seasonality Using Remote Sensing

نویسندگان

چکیده

Discriminating between woody plant species using a single image is not straightforward due to similarity in their spectral signatures, and limitations the spatial resolution of many sensors. Seasonal changes vegetation indices can potentially improve mapping; however, for mapping at individual level, very high needed. In this study we examined ability Israel/French satellite VENμS other sensors with higher resolutions, identifying Mediterranean species, based on seasonal patterns (VIs). For area, chose site natural highly heterogeneous Judean Mountains (Israel), which well represents maquis region. We used three from were derived: consumer-grade ground-based camera (weekly images VIS-NIR; six VIs; 547 plants), UAV imagery (11 images, five bands, seven VIs) resampled 14, 30, 125, 500 cm simulate resolutions available some satellites, Level 1 product (with nominal 5.3 m nadir; 1551 plants). The various described species’ VIs different levels success. Strong correlations near-surface given VI mostly persisted all ≤125 cm. ExG index presented ground data most (pixel size cm; 9 12 R ≥ 0.85; p < 0.001), classification accuracies ≤30 8 >70%), demonstrating possibility detailed space. dynamics obtained demonstrated dominant role ephemeral herbaceous signal recorded by sensor. low variance as observed may be explained its coarse (effective 7.5) non-nadir viewing angle (29.7°) over area. However, considering challenging characteristics research site, it that type sensor ~1 m) nadir point view more homogeneous dense areas would allow seasonality.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

on the relationship between using discourse markers and the quality of expository and argumentative academic writing of iranian english majors

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

15 صفحه اول

Identification of Invasive Species Using Remote Sensing and Vegetation Indices, (Case Study: Vazroud Rangelands, Iran)

Biological invasions form a major threat to the provision of ecosystems productsand services and can affect ecosystems across a wide spectrum of bioclimatic conditions.Therefore, it is important to systematically monitor the spread of species over broad regions. Ithas long been recognized that remote sensing and geographical information system couldcontribute to this capacity. This paper aims t...

متن کامل

the effect of using model essays on the develpment of writing proficiency of iranina pre-intermediate efl learners

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

on translation of phatic communion and socio-cultural relationships between the characters of the novels

phatic communion is a cultural concept which differs across cultures. according to hofstede (2001), the u.s. tends to have individualistic culture; however, asian countries tend to have collectivistic cultures. these cultures view phatic communion differently. in individualistic cultures like u.s., phatic communion reflects speakers’ socio-cultural relationships in conversations. to see whether...

15 صفحه اول

the effect of using visual aids on the development of speech act of disagreement among iranian intermediate efl learners

abstract the present study tried to investigate the effect of visual aids (films) on the development of the speech act of disagreement among iranian efl intermediate learners. to this end, the researcher selected 40 homogeneous intermediate learners based on their scores on oxford placement test. .the subjects then divided into control group and experimental group. both classes were tested by ...

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Remote Sensing

سال: 2021

ISSN: ['2315-4632', '2315-4675']

DOI: https://doi.org/10.3390/rs13101958