Results 31 to 40 of about 194,223 (152)

Rapid digitization to reclaim thematic maps of white-tailed deer density from 1982 and 2003 in the conterminous US [PDF]

open access: yesPeerJ, 2020
Background Despite availability of valuable ecological data in published thematic maps, manual methods to transfer published maps to a more accessible digital format are time-intensive. Application of object-based image analysis makes digitization faster.
Brice Hanberry, Phillip Hanberry
doaj   +2 more sources

Remote Sensing Image Fusion at the Segment Level Using a Spatially-Weighted Approach: Applications for Land Cover Spectral Analysis and Mapping

open access: yesISPRS International Journal of Geo-Information, 2015
Segment-level image fusion involves segmenting a higher spatial resolution (HSR) image to derive boundaries of land cover objects, and then extracting additional descriptors of image segments (polygons) from a lower spatial resolution (LSR) image.
Brian Johnson
doaj   +1 more source

Detailed Mapping of Lava and Ash Deposits at Indonesian Volcanoes by Means of VHR PlanetScope Change Detection

open access: yesRemote Sensing, 2022
Mapping of lava flows in unvegetated areas of active volcanoes using optical satellite data is challenging due to spectral similarities of volcanic deposits and the surrounding background.
Moritz Rösch, Simon Plank
doaj   +1 more source

Sentinel-2 satellite image application for establishing a coral reef distribution map in Bai Tu Long National Park, Quang Ninh Province, Vietnam [PDF]

open access: yesOne Ecosystem
Coral reef ecosystems are crucial in coastal areas, providing valuable ecosystem services to humans. They are highly biodiverse and act as significant carbon sinks.
Dung Ngo   +3 more
doaj   +3 more sources

The effect of input data transformations on object-based image analysis [PDF]

open access: yesRemote Sensing Letters, 2012
The effect of using spectral transform images as input data on segmentation quality and its potential effect on products generated by object-based image analysis are explored in the context of land cover classification in Accra, Ghana. Five image data transformations are compared to untransformed spectral bands in terms of their effect on segmentation ...
Christopher D, Lippitt   +5 more
openaire   +2 more sources

Aplikasi object-based image analysis untuk identifikasi awal permukiman kumuh menggunakan Citra satelit worldview-2

open access: yesMajalah Geografi Indonesia, 2018
Permukiman kumuh adalah perumahan yang mengalami penurunan kualitas fungsi sebagai tempat hunian.  Tidak layak huni karena ketidakteraturan bangunan, tingkat kepadatan bangunan yang tinggi, dan kualitas bangunan serta sarana dan prasarana yang tidak ...
Prima Widayani
doaj   +1 more source

OBJECT BASED IMAGE ANALYSIS AND TEXTURE FEATURES FOR PASTURE CLASSIFICATION IN BRAZILIAN SAVANNAH [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
The classification of different types of pasture using remote sensing imagery is still a challenge. Assessing high quality geospatial information of pasture management system and productivity are key factors for establishing local public policies related
C. D. Girolamo-Neto   +5 more
doaj   +1 more source

Assessing Global Forest Land-Use Change by Object-Based Image Analysis

open access: yesRemote Sensing, 2016
Consistent estimates of forest land-use and change over time are important for understanding and managing human activities on the Earth’s surface, parameterizing models used for global and regional climate change analyses and a critical component of ...
Erik J. Lindquist, Rémi D’Annunzio
doaj   +1 more source

Comparing Pixel- and Object-Based Approaches for Classifying Multispectral Drone Imagery of a Salt Marsh Restoration and Reference Site

open access: yesRemote Sensing
Monitoring salt marshes with remote sensing is necessary to evaluate their state and restoration. Determining appropriate techniques for this can be overwhelming.
Gregory S. Norris   +4 more
doaj   +1 more source

Object-based image analysis approach for vessel detection on optical and radar images [PDF]

open access: yesJournal of Applied Remote Sensing, 2019
Commercial satellites for Earth observation can integrate conventional positioning and tracking systems for monitoring legal and illegal activities by sea, in order to effectively detect and prevent events threatening human life and environment. This study describes an object-oriented approach to detect vessels combining high- and medium-resolution ...
Martina Aiello   +2 more
openaire   +1 more source

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