ManagePolygons: GUI: Polygon Manager

In USGS-R/RSurvey: Geographic Information System Application

Description

A graphical user interface (GUI) for managing and manipulating polygons that is based on the rgeos package.

Usage

ManagePolygons(polys = NULL, poly.data = NULL, poly.crop = NULL,
  crs = sp::CRS(as.character(NA)), parent = NULL)

Arguments

polys	list. A list of polygons, components are objects of class gpc.poly.
poly.data	character. Name of the polygon that defines the data boundary limits.
poly.crop	character. Name of the polygon that defines the crop region for interpolated data.
crs	CRS. Default coordinate reference system
parent	tkwin. GUI parent window

Details

The text file representation of a polygon is of the following format:

<number of contours>
<number of points in first contour>
<hole flag>
x1 y1
x2 y2
...
<number of points in second contour>
<hole flag>
x1 y1
x2 y2
...

The hole flag is either 1 to indicate a hole, or 0 for a regular contour. See the read.polyfile function for details.

Value

Returns an object of class list with components polys, poly.data, poly.crop, and crs (see ‘Arguments’ section).

Author(s)

J.C. Fisher, U.S. Geological Survey, Idaho Water Science Center

See Also

polyfile, gUnion, SetPolygons

Examples

## Not run: 
  ManagePolygons()

## End(Not run)

USGS-R/RSurvey documentation built on May 9, 2019, 6:10 p.m.