Make WKT point objects
Make WKT point objects
point(..., fmt = 16, third = "z")
... |
A GeoJSON-like object representing a Point, LineString, Polygon, MultiPolygon, etc. |
fmt |
Format string which indicates the number of digits to display after the decimal point when formatting coordinates. Max: 20 |
third |
(character) Only applicable when there are three dimensions.
If |
The third parameter is used only when there are sets of
three points, and you can toggle whether the object gets a Z or M.
When four points are included, the object automatically gets
assigned ZM
Other R-objects:
circularstring(),
geometrycollection(),
linestring(),
multilinestring(),
multipoint(),
multipolygon(),
polygon()
## empty point
point("empty")
# point("stuff")
## single point
point(-116.4, 45.2)
point(0, 1)
## single point, from data.frame
df <- data.frame(lon=-116.4, lat=45.2)
point(df)
## many points, from a data.frame
ussmall <- us_cities[1:5, ]
df <- data.frame(long = ussmall$long, lat = ussmall$lat)
point(df)
## many points, from a matrix
mat <- matrix(c(df$long, df$lat), ncol = 2)
point(mat)
## single point, from a list
point(list(c(100.0, 3.101)))
## many points, from a list
point(list(c(100.0, 3.101), c(101.0, 2.1), c(3.14, 2.18)))
## when a 3rd point is included
point(1:3, third = "m")
point(1:3, third = "z")
point(list(1:3, 4:6), third = "m")
point(list(1:3, 4:6), third = "z")
point(matrix(1:9, ncol = 3), third = "m")
point(matrix(1:9, ncol = 3), third = "z")
point(data.frame(1, 2, 3), third = "m")
point(data.frame(1, 2, 3), third = "z")
point(data.frame(1:3, 4:6, 7:9), third = "m")
## when a 4th point is included
point(1:4)
point(list(1:4, 5:8))
point(matrix(1:12, ncol = 4))
point(data.frame(1, 2, 3, 4))
point(data.frame(1:3, 4:6, 7:9, 10:12))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.