What is ndvi pdf

Frequently Asked Questions. Educational Resources. Multimedia Gallery. Web Tools. Board on Geographic Names. The National Map. USGS Library. USGS Store. Park Passes. News Releases. Featured Stories. Science Snippets. When analyzed through time, NDVI can reveal where vegetation is thriving and where it is under stress, as well as changes in vegetation due to human activities such as deforestation, natural disturbances such as wild fires, or changes in plants' phenological stage.

Science Explorer. Mission Areas. Unified Interior Regions. Science Centers. Frequently Asked Questions. Educational Resources. Multimedia Gallery. Web Tools. Board on Geographic Names. The National Map. USGS Library. USGS Store. Park Passes. News Releases. Featured Stories. Science Snippets. Technical Announcements. A short summary of this paper. Download Download PDF. Translate PDF. ISSN: Int. Mushtaq Ahmad Ganie1 and Dr. Asima Nusrath2. Manuscript Info Abstract ……………………. I delineation of non-vegetation classes Received: 14 June using NDVI threshold ii unsupervised classification to Delineate forest Final Accepted: 29 July plantation and iii supervised classification for the identification of Published: August apple orchards.

A non- vegetation classes like wastelands, water bodies, settlements has been masked using Vegetation Index VI derived using Key words:- remote sensing data. Vegetation has a distinctive spectral signature that Vegetation Indices NDVI, landsat 8, is characterized by low reflectance in visible region of solar optical Band 4, Band 5, Apple orchads.

The combination of these two spectral regions allows classification of vegetation. In the present study normalized difference vegetation index NDVI , Where NIR is the reflectance in near infrared band and R is the reflectance in red band of satellite data. NDVI indicates the vigor of vegetation. Higher NDVI indicates higher amount of green vegetation on ground. NDVI of non-vegetation classes are generally lower than vegetation classes. All rights reserved.

Observing the force and the thickness of the green vegetation development should be possible utilizing the reflection from the red band and the infrared band.