make_extrapolation_info: Build extrapolation grid

In merrillrudd/StreamUtils: Additional utilities for FishStats spatio-temporal modeling toolbox focusing on stream networks

Description

make_extrapolation_data builds an object used to determine areas to extrapolation densities to when calculating indices

Usage

make_extrapolation_info(Region, strata.limits, stream_info = NULL,
  zone = NA, flip_around_dateline = TRUE, ...)

Arguments

Region	a character entry that is matched against potential values to determine the region for the extrapolation grid.
strata.limits	an input for determining stratification of indices (see example script)
stream_info	data frame with at least 4 columns: latitude, longitude, and child node of stream segment (upstream node) associated with each observation, and "Area_km2"
...	other objects passed for individual regions (see example script)

Value

Tagged list used in other functions

a_el

The area associated with each extrapolation grid cell (rows) and strata (columns)

Data_Extrap

A data frame describing the extrapolation grid

zone

the zone used to convert Lat-Long to UTM by PBSmapping package

flip_around_dateline

a boolean stating whether the Lat-Long is flipped around the dateline during conversion to UTM

Area_km2_x

the area associated with each row of Data_Extrap, in units square-kilometers

merrillrudd/StreamUtils documentation built on May 29, 2019, 9:31 a.m.