tasmania_modifier

A raster dataset (11 timesteps) defining the intensity land-use cover for each
grid-cell in the Tasmania study region. NB. This dataset is projected and will not natively overlay
the other raster datasets contained in poems.

A framework of interoperable R6 classes (Chang, 2020, <https://CRAN.R-project.org/package=R6>) for building ensembles of viable models via the pattern-oriented modeling (POM) approach (Grimm et al.,2005, <doi:10.1126/science.1116681>). The package includes classes for encapsulating and generating model parameters, and managing the POM workflow. The workflow includes: model setup; generating model parameters via Latin hyper-cube sampling (Iman & Conover, 1980, <doi:10.1080/03610928008827996>); running multiple sampled model simulations; collating summary results; and validating and selecting an ensemble of models that best match known patterns. By default, model validation and selection utilizes an approximate Bayesian computation (ABC) approach (Beaumont et al., 2002, <doi:10.1093/genetics/162.4.2025>), although alternative user-defined functionality could be employed. The package includes a spatially explicit demographic population model simulation engine, which incorporates default functionality for density dependence, correlated environmental stochasticity, stage-based transitions, and distance-based dispersal. The user may customize the simulator by defining functionality for translocations, harvesting, mortality, and other processes, as well as defining the sequence order for the simulator processes. The framework could also be adapted for use with other model simulators by utilizing its extendable (inheritable) base classes.

July Pilowsky

poems

Pattern-Oriented Ensemble Modeling System

Sean Haythorne

Damien Fordham

Stuart Brown

Jessie Buettel

Barry Brook

tasmania_modifier function

A raster::RasterBrick object:<dl>
<dt>dimensions</dt>
<dd>36 rows, 34 columns, 11 layers</dd><dt>resolution</dt>
<dd>10km by 10km grid cells</dd><dt>extent</dt>
<dd>-211571.8, 128428.2, -182583.2, 177416.8 (xmin, xmax, ymin, ymax)</dd><dt>CRS</dt>
<dd>+proj=laea +lat_0=-42.2 +lon_0=147 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs</dd><dt>values</dt>
<dd>region defined by 1224 cells with values between 0-1. Values of 1 indicate extensive land use modification)</dd>
</dl>

Format

Tasmania land-use modifier raster — tasmania_modifier

A raster::RasterBrick object:<dl>
<dt>dimensions</dt>
<dd>36 rows, 34 columns, 11 layers</dd>

<dt>resolution</dt>
<dd>10km by 10km grid cells</dd>

<dt>extent</dt>
<dd>-211571.8, 128428.2, -182583.2, 177416.8 (xmin, xmax, ymin, ymax)</dd>

<dt>CRS</dt>
<dd>+proj=laea +lat_0=-42.2 +lon_0=147 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs</dd>

<dt>values</dt>
<dd>region defined by 1224 cells with values between 0-1. Values of 1 indicate extensive land use modification)</dd>


</dl>

tasmania_modifier: Tasmania land-use modifier raster

Description

Arguments

Format

Examples