prepTabcover: Prepare polygons for Table calculations

In darrennorris/cmartr: Functions for processing and analysing river turtle management

Description

Generates sf objects with attributes for Table values. Optionally exports polygon as shapefile.

Usage

prepTabcover(pBasin = NA, pBasinSp = NA, pBasinC = NA, riv = NA,
  rastAc = NA, make_shape = FALSE)

Arguments

pBasin	Subbasin cover polygons.
pBasinSp	Extent polygon covering subbasins in species range of occurance.
pBasinC	PA cover in subbasins with country.
riv	River lines.
rastAc	Raster brick with acessibility values.
make_shape	Logical (TRUE/FALSE). Generate polygon shapefiles of ......

Value

List with objects of class sf with attribute data used to generate result tables (epsg = 3395). Optionally writes shapefiles. riverb (sf.rivb) = 4629 river lines with basin attributes. riverbc (sf.rivb2) = 4791 river lines with basin and country attributes. riverpbc (sf.riv) = 2519 river lines with PA class, basin and country. basinc (sfclean3395c) = 71 polygons with basin and country. basinp (pac3395) = 169 polygons with PA class basin and country.

Examples

## Not run: 
# Load shapefiles needed
# These large files are not available via github package. 
# Download "shapes.zip" from :
# https://drive.google.com/open?id=1QQArA7pPLemUVQTKx7PxigsQXKpOG0YQ
# For the code below to work, 
# extract files in "shapes.zip" to cmartr/inst/shape .
# This function needs 4 shapefiles as listed below.

# Subbasin cover polygons
B <- system.file("shape/amazon_orinoco.shp", package="cmartr")
# Extent polygon covering subbasins in species range of occurance.
# From prepBasin.R .
Bsp <- system.file("shape/speciesBasin.shp", package="cmartr")
# PA cover in subbasins with country. From prepPAcountry.R 
BC <- system.file("shape/basinpacover.shp", package="cmartr")
# River lines.
rin <- system.file("shape/sa_strwgs84.shp", package="cmartr")
# Brick with acessibility raster
ras1 <- system.file("raster/uas.grd", package="cmartr")

# run, 4 - 5 hours depending on computer and memory allocation
lsf <- prepTabcover(pBasin = B, pBasinSp = Bsp, 
  pBasinC = BC, riv = rin, rastAc = ras1, make_shape = FALSE)

## End(Not run)

darrennorris/cmartr documentation built on May 23, 2020, 10:10 p.m.