Measuring The Leaf Area Index And Foliage Profile Of Forest Canopies Using A Group Based Lidar Instrument Echidna

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Measuring the Leaf Area Index and Foliage Profile of Forest Canopies Using a Group-based Lidar Instrument (Echidna)

Author : Feng Zhao
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (746 download)

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Book Synopsis Measuring the Leaf Area Index and Foliage Profile of Forest Canopies Using a Group-based Lidar Instrument (Echidna) by : Feng Zhao

Download or read book Measuring the Leaf Area Index and Foliage Profile of Forest Canopies Using a Group-based Lidar Instrument (Echidna) written by Feng Zhao and published by . This book was released on 2011 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Effective leaf area index (LAI) retrievals from a ground-based, upward-scanning, under-canopy, full waveform, near-infrared (1064 nm) lidar, the Echidna Validation Instrument (EVI), agree with those obtained from both hemispherical photography and the Li-Cor LAI-2000 Plant Canopy Analyzer. A newly proposed approach for clumping index retrieval based on the three dimensional structure of gaps also produced clumping index measurements that were consistent with those of gap-size distribution theory using hemispherical photography, documenting the ability of the EVI to characterize the clumping of forest foliage at the stand scale. These results are based on trials at 28 plots within six hardwood and conifer stands at Harvard Forest, Massachusetts, Bartlett Experimental Forest, New Hampshire, and Howland Experimental Forest, Maine, from July 2007, and on additional 30 plots within six conifer stands in Sierra National Forest, California, from July 2008. These stands vary in tree heights, stocking densities, and local surface topography. In addition to LAI, foliage profiles (leaf area with height), can be estimated from the EVI. These are difficult to retrieve from hemispherical photos or LAI-2000 measurements, but are easily derived from EVI observations of gap probability with zenith angle. The foliage profiles retrieved were consistent with stand structure as observed in the field and match well with those obtained from Lidar Vegetation Imaging Sensor (LVIS) airborne large-footprint lidar system. Tree heights as determined from the foliage profiles retrieved by the EVI are also close to heights determined using the LVIS. LAI and foliage profile (leaf area with height) are key biophysical parameters for assessing plant productivity, and for understanding atmosphere-vegetation exchange processes such as photosynthesis, evaporation and transpiration, and carbon flux. The accuracies of many modeling studies using LAI as a key input depend heavily on the accuracies of ground-truth LAI estimates. The Echidna Validation Instrument is the first realization of the Echidna® lidar concept, devised by Australia's Commonwealth Scientific and Industrial Research Organization (CSIRO), for measuring forest structure using full-waveform, ground-based, scanning lidar.

Measuring Forest Structure and Biomass Using Echidna® Ground-based Lidar

Author : Tian Yao
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.:/5 (958 download)

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Book Synopsis Measuring Forest Structure and Biomass Using Echidna® Ground-based Lidar by : Tian Yao

Download or read book Measuring Forest Structure and Biomass Using Echidna® Ground-based Lidar written by Tian Yao and published by . This book was released on 2012 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Forest canopy structural parameters and above-ground biomass, retrieved by a ground-based, upward-scanning, near-infrared (1064 nm), full-waveform lidar, the Echidna® Validation Instrument (EVI), matched ground measurements with R2 values of 0.92 to 0.99 at six hardwood and conifer forest sites within New England in 2007 and at eight conifer forest sites in the Sierra National Forest in California in 2008. Retrieved parameters included mean diameter at breast height (DBH), stem count density, basal area, and above-ground biomass, based on five scans within each 1-ha plot. Canopy heights derived from the EVI-retrieved foliage profile closely matched those derived from the airborne Laser Vegetation Imaging Sensor (LVIS). Topographic slope can induce errors in parameter retrievals because the horizontal plane of the instrument scan, which is used to identify, measure, and count tree trunks, will intersect trunks below breast height in the uphill direction and above breast height in the downhill direction. I tested three methods of slope correction on the Sierra sites. Without correction, single-scan correlations of structural parameters with field measurements ranged from 0.53-0.86; after correction, from 0.78-0.91, 0.80-0.93 and 0,85-0.93 for the three methods respectively. These results document the importance of the slope correction in EVI structural retrievals. Three sites scanned in 2007 provided the opportunity to detect change in comparison to 2009 or 2010 scans. At a shelterwood conifer site at Howland Experimental Forest, mean DBH, above-ground biomass, and leaf area index (LAI) all increased between 2007 and 2009. An ice storm struck the Harvard Forest in December, 2008, providing the opportunity to detect damage between 2007 and 2009 or 2010 EVI scans at two sites there: hemlock and hardwood. Retrieved leaf area index (LAI) was 13 percent lower in the hemlock site in 2009 and 10 percent lower in the hardwood site in 2010. Broken tops were visible in the 2010 data. Stem density decreased and mean DBH increased at both sites, as small and weak trees were felled by the ice.

Remote Sensing of Leaf Area Index (LAI) and Other Vegetation Parameters

Author : Francisco Javier García-Haro
Publisher : MDPI
ISBN 13 : 3039212397
Total Pages : 334 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Remote Sensing of Leaf Area Index (LAI) and Other Vegetation Parameters by : Francisco Javier García-Haro

Download or read book Remote Sensing of Leaf Area Index (LAI) and Other Vegetation Parameters written by Francisco Javier García-Haro and published by MDPI. This book was released on 2019-09-16 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring of vegetation structure and functioning is critical to modeling terrestrial ecosystems and energy cycles. In particular, leaf area index (LAI) is an important structural property of vegetation used in many land surface vegetation, climate, and crop production models. Canopy structure (LAI, fCover, plant height, and biomass) and biochemical parameters (leaf pigmentation and water content) directly influence the radiative transfer process of sunlight in vegetation, determining the amount of radiation measured by passive sensors in the visible and infrared portions of the electromagnetic spectrum. Optical remote sensing (RS) methods build relationships exploiting in situ measurements and/or as outputs of physical canopy radiative transfer models. The increased availability of passive (radar and LiDAR) RS data has fostered their use in many applications for the analysis of land surface properties and processes, thanks also to their insensitivity to weather conditions and the capability to exploit rich structural and textural information. Data fusion and multi-sensor integration techniques are pressing topics to fully exploit the information conveyed by both optical and microwave bands.

Using a Ground-based Lidar Instrument (Echidna ®) to Reconstruct Three-dimensional Forest Structure for Biophysical and Ecological Studies

Download Using a Ground-based Lidar Instrument (Echidna ®) to Reconstruct Three-dimensional Forest Structure for Biophysical and Ecological Studies PDF Online Free

Author : Xiaoyuan Yang
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (914 download)

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Book Synopsis Using a Ground-based Lidar Instrument (Echidna ®) to Reconstruct Three-dimensional Forest Structure for Biophysical and Ecological Studies by : Xiaoyuan Yang

Download or read book Using a Ground-based Lidar Instrument (Echidna ®) to Reconstruct Three-dimensional Forest Structure for Biophysical and Ecological Studies written by Xiaoyuan Yang and published by . This book was released on 2012 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Three-dimensional reconstructions of forest stands, assembled from multiple scans of the ground-based full-waveform lidar, Echidna® Validation Instrument (EVI), provide a new pathway to estimate biophysical parameters of forest structure, as well as a novel ecological application visualizing bat flight tracks through a reconstructed forest. I reconstruct six 50 m by 50 m forest stands of varying canopy density and species from the Sierra Nevada National Forest, California, and the Harvard Forest, Petersham, Massachusetts, using lidar data acquired in 2008 and 2009. I use commercial software tools to display, manipulate, and produce "fly-through" visualizations of our forest stands. The procedure processes each returned lidar pulse to identify one or multiple "hits"; converts associated peak power to apparent reflectance; classifies hits as ground hits or non-ground hits of either trunk/branch or foliage using apparent reflectance; locates hits in Cartesian coordinates; stores hits as points in a point cloud; and registers five or more overlapping scans into a single point cloud reconstruction. Applying visualization tools, I estimate forest structural parameters that include tree diameter at breast height (DBH), tree height, crown diameter, crown height, and foliage area volume density (FAVD), that agree with field measurements and by airborne lidar data. I generate a fine-resolution digital terrain model (DTM) and canopy height model (CHM) at each site, to measure individual DBH and tree height more accurately. In an ecological application, I reconstruct three-dimensional bat flight trajectories using imaging data from thermal infrared cameras at a bat roosting and maternity site in Petersham, and co-register them to a three-dimensional forest reconstruction built from nine scans at the site. Patterns of flight trajectories during first 5 seconds of emergence from the roosting barn show how the bats chose different flight routes to forage along the edge of a forest and into the understory.

DSCOVR EPIC/NISTAR: 5 years of observing earth from the first lagrangian point

Author : Alexei Lyapustin
Publisher : Frontiers Media SA
ISBN 13 : 2832500757
Total Pages : 312 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis DSCOVR EPIC/NISTAR: 5 years of observing earth from the first lagrangian point by : Alexei Lyapustin

Download or read book DSCOVR EPIC/NISTAR: 5 years of observing earth from the first lagrangian point written by Alexei Lyapustin and published by Frontiers Media SA. This book was released on 2022-12-12 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Method for Estimating Canopy Openness, Effective Leaf Area Index, and Photosynthetically Active Photon Flux Density Using Hemispherical Photography and Computerized Image Analysis Techniques

Download A Method for Estimating Canopy Openness, Effective Leaf Area Index, and Photosynthetically Active Photon Flux Density Using Hemispherical Photography and Computerized Image Analysis Techniques PDF Online Free

Author : G. W. Frazer
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis A Method for Estimating Canopy Openness, Effective Leaf Area Index, and Photosynthetically Active Photon Flux Density Using Hemispherical Photography and Computerized Image Analysis Techniques by : G. W. Frazer

Download or read book A Method for Estimating Canopy Openness, Effective Leaf Area Index, and Photosynthetically Active Photon Flux Density Using Hemispherical Photography and Computerized Image Analysis Techniques written by G. W. Frazer and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hemispherical canopy photography is an indirect method for measuring various components of forest canopy structure and solar radiation flux within and below forest canopies. The method utilizes a 180-degree fisheye-lens camera to capture and record the position, size, and shape of openings or gaps in a forest canopy. During late summer 1995, eight sites on southern Vancouver Island were intensively sampled using hemispherical photographic methods. This document describes the general theory, approach, and analytical tools associated with hemispherical canopy photography and computerized image analysis in the context of this research. As a result, a technical protocol has been devised that can be adopted, modified, and improved upon by those interested in using hemispherical techniques for similar research initiatives. Recommendations are made to improve the quality and reliability of future hemispherical image analysis systems. Appendices include information on measurement of fisheye lens distortion and the effect on the calculation of gap fraction magnitude and distribution, and a model for estimating percent open sky and leaf area index.

Instrumentation for Studying Vegetation Canopies for Remote Sensing in Optical and Thermal Infrared Regions

Author : Narendra S. Goel
Publisher : Taylor & Francis
ISBN 13 : 9783718650989
Total Pages : 386 pages
Book Rating : 4.6/5 (59 download)

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Book Synopsis Instrumentation for Studying Vegetation Canopies for Remote Sensing in Optical and Thermal Infrared Regions by : Narendra S. Goel

Download or read book Instrumentation for Studying Vegetation Canopies for Remote Sensing in Optical and Thermal Infrared Regions written by Narendra S. Goel and published by Taylor & Francis. This book was released on 1990 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 1991. Routledge is an imprint of Taylor & Francis, an informa company.

Evaluation of Forest Canopies by Photography

Author : Philip L. Johnson
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Evaluation of Forest Canopies by Photography by : Philip L. Johnson

Download or read book Evaluation of Forest Canopies by Photography written by Philip L. Johnson and published by . This book was released on 1968 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A technique for evaluating forest canopies was developed based on the use of a divergent lens system to obtain hemispherical photographs of tree crowns. The photography was processed from 35 mm film and enlarged as a silhouette, and the light transmission was measured with a specially fabricated macrodensitometer. It is shown by application to a variety of problems in diverse geographical areas that this technique can be used for measuring both temporal and spatial changes in the canopy, for estimating the shade light climate, and for specifying the probability of target detection through a canopy. Data are presented to analyze changes caused by explosions, radioactivity, growing season, and vegetation types. The geometry of gaps in three crowns is discussed and the nature of shade light quality under forests is illustrated. (Author).

Quantifying Forest Structure Parameters and Their Changes from LiDAR Data and Satellite Imagery in the Sierra Nevada

Author : Qin Ma
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (15 download)

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Book Synopsis Quantifying Forest Structure Parameters and Their Changes from LiDAR Data and Satellite Imagery in the Sierra Nevada by : Qin Ma

Download or read book Quantifying Forest Structure Parameters and Their Changes from LiDAR Data and Satellite Imagery in the Sierra Nevada written by Qin Ma and published by . This book was released on 2018 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sierra Nevada forests have provided many economic benefits and ecological services to people in California, and the rest of the world. Dramatic changes are occurring in the forests due to climate warming and long-term fire suppression. Accurate mapping and monitoring are increasingly important to understand and manage the forests. Light Detection and Range (LiDAR), an active remote sensing technique, can penetrate the canopy and provide three-dimensional estimates of forest structures. LiDAR-based forest structural estimation has been demonstrated to be more efficient than field measurements and more accurate than those from passive remote sensing, like satellite imagery. Research in this dissertation aims at mapping and monitoring structural changes in Sierra Nevada forests by taking the advantages of LiDAR. We first evaluated LiDAR and fine resolution imagery-derived canopy cover estimates using different algorithms and data acquisition parameters. We suggested that LiDAR data obtained at 1 point/m2 with a scan angle smaller than 12°were sufficient for accurate canopy cover estimation in the Sierra Nevada mix-conifer forests. Fine resolution imagery is suitable for canopy cover estimation in forests with median density but may over or underestimate canopy cover in extremely coarse or dense forests. Then, a new LiDAR-based strategy was proposed to quantify tree growth and competition at individual tree and forest stand levels. Using this strategy, we illustrated how tree growth in two Sierra Nevada forests responded to tree competition, original tree sizes, forest density, and topography conditions; and identified that the tree volume growth was determined by the original tree sizes and competitions, but tree height and crown area growth were mostly influenced by water and space availability. Then, we calculated the forest biomass disturbance in a Sierra Nevada forest induced by fuel treatments using bi-temporal LiDAR data and field measurements. Using these results as references, we found that Landsat imagery-derived vegetation indices were suitable for quantifying canopy cover changes and biomass disturbances in forests with median density. Large uncertainties existed in applying the vegetation indices to quantify disturbance in extremely dense forests or forests only disturbed in the understory. Last, we assessed vegetation losses caused by the American Fire in 2013 using a new LiDAR point based method. This method was able to quantify fire-induced forest structure changes in basal area and leaf area index with lower uncertainties, compared with traditional LiDAR metrics and satellite imagery-derived vegetation indices. The studies presented in this dissertation can provide guidance for forest management in the Sierra Nevada, and potentially serve as useful tools for forest structural change monitoring in the rest of the world.

Consistent Determination of Leaf Area Index and Quantification of Foliage Distribution in Forest Canopies Based on Digital Hemispherical Photography

Download Consistent Determination of Leaf Area Index and Quantification of Foliage Distribution in Forest Canopies Based on Digital Hemispherical Photography PDF Online Free

Author : Inge G. C. Jonckheere
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.:/5 (476 download)

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Book Synopsis Consistent Determination of Leaf Area Index and Quantification of Foliage Distribution in Forest Canopies Based on Digital Hemispherical Photography by : Inge G. C. Jonckheere

Download or read book Consistent Determination of Leaf Area Index and Quantification of Foliage Distribution in Forest Canopies Based on Digital Hemispherical Photography written by Inge G. C. Jonckheere and published by . This book was released on 2005 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Photosynthesis of Leaf Canopies

Author : Cornelis Teunis de Wit
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Photosynthesis of Leaf Canopies by : Cornelis Teunis de Wit

Download or read book Photosynthesis of Leaf Canopies written by Cornelis Teunis de Wit and published by . This book was released on 1965 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a procedure to calculate the effect of certain environmental factors on the rate of photo-synthesis imposed mainly geometrical problems, which were solved in such a way that the actual calculation could be carried out by means of a computer. The calculation procedures have been used to study the. relative importance of the variables under various conditions. The results for a standard set of conditions, have been summarized in order to make it possible to estimate the daily photosynthesis at any time and place for a wide range of photosynthesis functions without a computer.

LiDAR Principles, Processing and Applications in Forest Ecology

Author : Qinghua Guo
Publisher : Academic Press
ISBN 13 : 0128242116
Total Pages : 510 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis LiDAR Principles, Processing and Applications in Forest Ecology by : Qinghua Guo

Download or read book LiDAR Principles, Processing and Applications in Forest Ecology written by Qinghua Guo and published by Academic Press. This book was released on 2023-03-10 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: LiDAR Principles, Processing and Applications in Forest Ecology introduces the principles of LiDAR technology and explains how to collect and process LiDAR data from different platforms based on real-world experience. The book provides state-of the-art algorithms on how to extract forest parameters from LiDAR and explains how to use them in forest ecology. It gives an interdisciplinary view, from the perspective of remote sensing and forest ecology. Because LiDAR is still rapidly developing, researchers must use programming languages to understand and process LiDAR data instead of established software. In response, this book provides Python code examples and sample data. Sections give a brief history and introduce the principles of LiDAR, as well as three commonly seen LiDAR platforms. The book lays out step-by-step coverage of LiDAR data processing and forest structure parameter extraction, complete with Python examples. Given the increasing usefulness of LiDAR in forest ecology, this volume represents an important resource for researchers, students and forest managers to better understand LiDAR technology and its use in forest ecology across the world. The title contains over 15 years of research, as well as contributions from scientists across the world. Presents LiDAR applications for forest ecology based in real-world experience Lays out the principles of LiDAR technology in forest ecology in a systematic and clear way Provides readers with state-of the-art algorithms on how to extract forest parameters from LiDAR Offers Python code examples and sample data to assist researchers in understanding and processing LiDAR data Contains over 15 years of research on LiDAR in forest ecology and contributions from scientists working in this field across the world

Estimating Forest Structural Characteristics with Airborne Lidar Scanning and a Near-real Time Profiling Laser Systems

Author : Kaiguang Zhao
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (69 download)

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Book Synopsis Estimating Forest Structural Characteristics with Airborne Lidar Scanning and a Near-real Time Profiling Laser Systems by : Kaiguang Zhao

Download or read book Estimating Forest Structural Characteristics with Airborne Lidar Scanning and a Near-real Time Profiling Laser Systems written by Kaiguang Zhao and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LiDAR (Light Detection and Ranging) directly measures canopy vertical structures, and provides an effective remote sensing solution to accurate and spatiallyexplicit mapping of forest characteristics, such as canopy height and Leaf Area Index. However, many factors, such as large data volume and high costs for data acquisition, precludes the operational and practical use of most currently available LiDARs for frequent and large-scale mapping. At the same time, a growing need is arising for realtime remote sensing platforms, e.g., to provide timely information for urgent applications. This study aims to develop an airborne profiling LiDAR system, featured with on-the-fly data processing, for near real- or real- time forest inventory. The development of such a system involves implementing the on-board data processing and analysis as well as building useful regression-based models to relate LiDAR measurements with forest biophysical parameters. This work established a paradigm for an on-the-fly airborne profiling LiDAR system to inventory regional forest resources in real- or near real- time. The system was developed based on an existing portable airborne laser system (PALS) that has been previously assembled at NASA by Dr. Ross Nelson. Key issues in automating PALS as an on-the-fly system were addressed, including the design of an archetype for the system workflow, the development of efficient and robust algorithms for automatic data processing and analysis, the development of effective regression models to predict forest biophysical parameters from LiDAR measurements, and the implementation of an integrated software package to incorporate all the above development. This work exploited the untouched potential of airborne laser profilers for realtime forest inventory, and therefore, documented an initial step toward developing airborne-laser-based, on-the-fly, real-time, forest inventory systems. Results from this work demonstrated the utility and effectiveness of airborne scanning or profiling laser systems for remotely measuring various forest structural attributes at a range of scales, i.e., from individual tree, plot, stand and up to regional levels. The system not only provides a regional assessment tool, one that can be used to repeatedly, remotely measure hundreds or thousands of square kilometers with little/no analyst interaction or interpretation, but also serves as a paradigm for future efforts in building more advanced airborne laser systems such as real-time laser scanners.

Using LiDAR and Normalized Difference Vegetation Index to Remotely Determine LAI and Percent Canopy Cover at Varying Scales

Author : Alicia Marie Rutledge Griffin
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (61 download)

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Book Synopsis Using LiDAR and Normalized Difference Vegetation Index to Remotely Determine LAI and Percent Canopy Cover at Varying Scales by : Alicia Marie Rutledge Griffin

Download or read book Using LiDAR and Normalized Difference Vegetation Index to Remotely Determine LAI and Percent Canopy Cover at Varying Scales written by Alicia Marie Rutledge Griffin and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of airborne LiDAR (Light Detection and Ranging) as a direct method to evaluate forest canopy parameters is vital in addressing both forest management and ecological concerns. The overall goal of this study was to develop the use of airborne LiDAR in evaluating canopy parameters such as percent canopy cover (PCC) and leaf area index (LAI) for mixed pine and hardwood forests (primarily loblolly pine, Pinus taeda, forests) of the southeastern United States. More specific objectives were to: (1) Develop scanning LiDAR and multispectral imagery methods to estimate PCC and LAI over both hardwood and coniferous forests; (2) investigate whether a LiDAR and normalized difference vegetation index (NDVI) data fusion through linear regression improve estimates of these forest canopy characteristics; (3) generate maps of PCC and LAI for the study region, and (4) compare local scale LiDAR-derived PCC and regional scale MODIS-based PCC and investigate the relationship. Scanning LiDAR data was used to derive local scale PCC estimates, and TreeVaW, a LiDAR software application, was used to locate individual trees to derive an estimate of plot-level PCC. A canopy height model (CHM) was created from the LiDAR dataset and used to determine tree heights per plot. QuickBird multispectral imagery was used to calculate the NDVI for the study area. LiDAR- and NDVI-derived estimates of plot-level PCC and LAI were compared to field observations for 53 plots over 47 square kilometers. Linear regression analysis resulted in models explaining 84% and 78% of the variability associated with PCC and LAI, respectively. For these models to be of use in future studies, LiDAR point density must be 2.5 m. The relationship between regional scale PCC and local scale PCC was investigated by resizing the local scale LiDAR-derived PCC map to lower resolution levels, then determining a regression model relating MODIS data to the local values of PCC. The results from this comparison showed that MODIS PCC data is not very accurate at local scales. The methods discussed in this paper show great potential for improving the speed and accuracy of ecological studies and forest management.

Correlations of leaf area with length and width measurements of leaves of black oak, white oak, and sugar maple

Author : Philip M. Wargo
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Correlations of leaf area with length and width measurements of leaves of black oak, white oak, and sugar maple by : Philip M. Wargo

Download or read book Correlations of leaf area with length and width measurements of leaves of black oak, white oak, and sugar maple written by Philip M. Wargo and published by . This book was released on 1978 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Characterizing the Radiation Regime in Nonrandom Forest Canopies

Author : Christopher J. Kucharik
Publisher :
ISBN 13 :
Total Pages : 652 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Characterizing the Radiation Regime in Nonrandom Forest Canopies by : Christopher J. Kucharik

Download or read book Characterizing the Radiation Regime in Nonrandom Forest Canopies written by Christopher J. Kucharik and published by . This book was released on 1997 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Airborne Lidar Systems and Data Processing

Author :
Publisher :
ISBN 13 : 9783038426738
Total Pages : 508 pages
Book Rating : 4.4/5 (267 download)

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Book Synopsis Advances in Airborne Lidar Systems and Data Processing by :

Download or read book Advances in Airborne Lidar Systems and Data Processing written by and published by . This book was released on 2018-05-11 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects the papers in the special issue "Airborne Laser Scanning" in Remote Sensing (Nov. 2016) and several other selected papers published in the same journal in the past few years. Our intention is to reflect recent technological developments and innovative techniques in this field. The book consists of 23 papers in six subject areas: 1) Single photon and Geiger-mode Lidar, 2) Multispectral lidar, 3) Waveform lidar, 4) Registration of point clouds, 5) Trees and terrain, and 6) Building extraction. The book is a valuable resource for scientists, engineers, developers, instructors, and graduate students interested in lidar systems and data processing.