xfer_draw: xfer_draw Draw extent of transfer

In wallace: A Modular Platform for Reproducible Modeling of Species Niches and Distributions

xfer_draw Draw extent of transfer

Description

This function creates a polygon object from coordinates of user drawn poylgon in the GUI.

Usage

xfer_draw(polyXfXY, polyXfID, drawXfBuf, logger = NULL, spN = NULL)

Arguments

polyXfXY	coordinates of polygon endpoints obtained from user drawn polygon
polyXfID	numeric .ID to be used in the generation of the polygon
drawXfBuf	the buffer to be used in generating the SpatialPolygonsDataFrame, must be >=0 . A number must be specified.
logger	Stores all notification messages to be displayed in the Log Window of Wallace GUI. Insert the logger reactive list here for running in shiny, otherwise leave the default NULL
spN	character. Used to obtain species name for logger messages

Details

This function is used in the transfer model component. In the GUI, the user draws a polygon to be used as the extent of transfer and may include a buffer to the given polygon. The function returns a SpatialPolygonsDataFrame object of the desired extent (+ buffer).

Value

This functions returns a SpatialPolygons object based on the user specified coordinates (drawn on map). This SpatialPolygonsDataFrame may be larger than specified if drawBgBuf > 0.

Author(s)

Gonzalo Pinilla <[e-mail]>

Bethany A. Johnson <[e-mail]>

See Also

xfer_userEnvs

Examples

longitude <- c(-27.78641, -74.09170, -84.01930, -129.74867,
               -142.19085, -45.55045, -28.56050)
latitude <- c(-40.40539, -37.02010, 2.28455, 40.75350,
              56.35954, 54.55045, -7.11861)
userDrawPoly <- matrix(c(longitude, latitude), byrow = FALSE,
                       ncol = 2)
drawXfBuf <- 0.5
polyXfID <- 1
polygonTest <- xfer_draw(polyXfXY = userDrawPoly, polyXfID,
                         drawXfBuf)

wallace documentation built on Sept. 11, 2024, 9:16 p.m.