Title: Calculates the Leaf Area Index (LAD) and Other Related Functions
person(given="Danilo Roberti Alves de", family="Almeida", email="daniloflorestas@gmail.com", role=c("aut", "cre"), comment=c(ORCID="https://orcid.org/0000-0002-8747-0085")),
person(given="Scott Christopher", family="Stark", email="scottcstark@gmail.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0002-1305-1793")),
person(given="Carlos Alberto", family="Silva", email="carlos_engflorestal@outlook.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0002-7844-3560")),
person(given="Caio", family="Hamamura", email="caiohamamura@gmail.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0001-6149-5885"))
Description: A set of functions for analyzing the structure
of forests based on the leaf area density (LAD) and leaf area index (LAI) measures
calculated from Airborne Laser Scanning (ALS), i.e., scanning lidar (Light Detection
and Ranging) data. The methodology is discussed and described in
Imports: lidR, sp, data.table, raster, lazyeval
Author: Danilo Roberti Alves de Almeida [aut, cre]
Scott Christopher Stark [aut] (<https://orcid.org/0000-0002-1305-1793>),
Carlos Alberto Silva [aut] (<https://orcid.org/0000-0002-7844-3560>),
Maintainer: Danilo Roberti Alves de Almeida <daniloflorestas@gmail.com>

person(given="Scott Christopher", family="Stark", email="scottcstark@gmail.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0002-1579-1648")),
Imports: lidR, sp, data.table, raster, stats, lazyeval
Scott Christopher Stark [aut] (<https://orcid.org/0000-0002-1579-1648>),

person(given="Caio", family="Hamamura", email="caiohamamura@gmail.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0001-6149-5885")),
person(given="Ruben", family="Valbuena", email="rubenvalpue@gmail.com", role=c("aut"), comment=c(ORCID="https://orcid.org/0000-0003-0493-7581"))
Imports: lidR, sp, data.table, raster, stats

Title: Silhouette to Area Ratio of Tilted Surfaces
Author: Agustina Ventre Lespiaucq [aut, cre], Silvia Santamaria Bueno [aut]
Maintainer: Agustina Ventre Lespiaucq <aguslespiaucq@gmail.com>
Description: Implementation of trigonometric functions to calculate the exposure of flat, tilted surfaces, such as leaves and slopes, to direct solar radiation. It implements the equations in A.G. Escribano-Rocafort, A. Ventre-Lespiaucq, C. Granado-Yela, et al. (2014) <doi:10.1111/2041-210X.12141> in a few user-friendly R functions. All functions handle data obtained with 'Ahmes' 1.0 for Android, as well as more traditional data sources (compass, protractor, inclinometer). The main function (star()) calculates the potential exposure of flat, tilted surfaces to direct solar radiation (silhouette to area ratio, STAR). It is equivalent to the ratio of the leaf projected area to total leaf area, but instead of using area data it uses spatial position angles, such as pitch, roll and course, and information on the geographical coordinates, hour, and date. The package includes additional functions to recalculate STAR with custom settings of location and time, to calculate the tilt angle of a surface, and the minimum angle between two non-orthogonal planes.
Packaged: 2017-09-18 13:26:03 UTC; silvia.santamaria