maptools: sp2tmap – R documentation

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sp2tmap

Convert SpatialPolygons object for Stata tmap command

Description

The function converts a SpatialPolygons object for use with the Stata tmap command, by creating a data frame with the required columns.

Usage

sp2tmap(SP)

Arguments

`SP`	a SpatialPolygons object

Value

a data frame with three columns:

`\_ID`	an integer vector of polygon identifiers in numeric order
`\_X`	numeric x coordinate
`\_Y`	numeric y coordinate

and an ID_n attribute with the named polygon identifiers

Author(s)

Roger Bivand

References

https://www.stata.com/search.cgi?query=tmap

Examples

## Not run: 
xx <- readShapePoly(system.file("shapes/sids.shp", package="maptools")[1],
 IDvar="FIPSNO", proj4string=CRS("+proj=longlat +ellps=clrk66"))
plot(xx, border="blue", axes=TRUE, las=1)
tmapdf <- sp2tmap(as(xx, "SpatialPolygons"))
if (require(foreign)) {
td <- tempdir()
write.dta(tmapdf, file=file.path(td, "NCmap.dta"), version=7)
NCdf <- as(xx, "data.frame")
NCdf$ID_n <- attr(tmapdf, "ID_names")
write.dta(NCdf, file=file.path(td, "NC.dta"), version=7)
}

## End(Not run)

maptools

Tools for Handling Spatial Objects

v1.1-1

GPL (>= 2)

Authors

Roger Bivand [cre, aut] (<https://orcid.org/0000-0003-2392-6140>), Nicholas Lewin-Koh [aut], Edzer Pebesma [ctb], Eric Archer [ctb], Adrian Baddeley [ctb], Nick Bearman [ctb], Hans-Jörg Bibiko [ctb], Steven Brey [ctb], Jonathan Callahan [ctb], German Carrillo [ctb], Stéphane Dray [ctb], David Forrest [ctb], Michael Friendly [ctb], Patrick Giraudoux [ctb], Duncan Golicher [ctb], Virgilio Gómez Rubio [ctb], Patrick Hausmann [ctb], Karl Ove Hufthammer [ctb], Thomas Jagger [ctb], Kent Johnson [ctb], Matthew Lewis [ctb] (<https://orcid.org/0000-0003-2244-4078>), Sebastian Luque [ctb], Don MacQueen [ctb], Andrew Niccolai [ctb], Edzer Pebesma [ctb], Oscar Perpiñán Lamigueiro [ctb], Ethan Plunkett [ctb], Ege Rubak [ctb] (<https://orcid.org/0000-0002-6675-533X>), Tom Short [ctb], Greg Snow [ctb], Ben Stabler [ctb], Murray Stokely [ctb], Rolf Turner [ctb]

Initial release

2021-03-14