Description Usage Arguments See Also Examples
Make WKT linestring objects
1 | linestring(..., 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 |
Other R-objects:
circularstring()
,
geometrycollection()
,
multilinestring()
,
multipoint()
,
multipolygon()
,
point()
,
polygon()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | ## empty linestring
linestring("empty")
# linestring("stuff")
## character string
linestring("LINESTRING (-116.4 45.2, -118.0 47.0)")
# numeric
## 2D
linestring(c(100.000, 0.000), c(101.000, 1.000), fmt=2)
linestring(c(100.0, 0.0), c(101.0, 1.0), c(120.0, 5.00), fmt=2)
## 3D
linestring(c(0.0, 0.0, 10.0), c(2.0, 1.0, 20.0),
c(4.0, 2.0, 30.0), c(5.0, 4.0, 40.0), fmt=2)
## 4D
linestring(c(0.0, 0.0, 10.0, 5.0), c(2.0, 1.0, 20.0, 5.0),
c(4.0, 2.0, 30.0, 5.0), c(5.0, 4.0, 40.0, 5.0), fmt=2)
# data.frame
df <- data.frame(lon=c(-116.4,-118), lat=c(45.2,47))
linestring(df, fmt=1)
df <- data.frame(lon=c(-116.4,-118,-120), lat=c(45.2,47,49))
linestring(df, fmt=1)
## 3D
df$altitude <- round(runif(NROW(df), 10, 50))
linestring(df, fmt=1)
linestring(df, fmt=1, third = "m")
## 4D
df$weight <- round(runif(NROW(df), 0, 1), 1)
linestring(df, fmt=1)
# matrix
mat <- matrix(c(-116.4,-118, 45.2, 47), ncol = 2)
linestring(mat, fmt=1)
mat2 <- matrix(c(-116.4, -118, -120, 45.2, 47, 49), ncol = 2)
linestring(mat2, fmt=1)
## 3D
mat <- matrix(c(df$long, df$lat, df$altitude), ncol = 3)
polygon(mat, fmt=2)
polygon(mat, fmt=2, third = "m")
## 4D
mat <- matrix(unname(unlist(df)), ncol = 4)
polygon(mat, fmt=2)
# list
linestring(list(c(100.000, 0.000), c(101.000, 1.000)), fmt=2)
## 3D
line <- list(c(100, 0, 1), c(101, 0, 1), c(101, 1, 1),
c(100, 0, 1))
linestring(line, fmt=2)
linestring(line, fmt=2, third = "m")
## 4D
line <- list(c(100, 0, 1, 40), c(101, 0, 1, 44), c(101, 1, 1, 45),
c(100, 0, 1, 49))
linestring(line, fmt=2)
|
Attaching package: 'wellknown'
The following object is masked from 'package:graphics':
polygon
[1] "LINESTRING EMPTY"
[1] "LINESTRING (-116.4 45.2, -118.0 47.0)"
[1] "LINESTRING (100.00 0.00, 101.00 1.00)"
[1] "LINESTRING (100.00 0.00, 101.00 1.00, 120.00 5.00)"
[1] "LINESTRING Z(0.00 0.00 10.00, 2.00 1.00 20.00, 4.00 2.00 30.00, 5.00 4.00 40.00)"
[1] "LINESTRING ZM(0.00 0.00 10.00 5.00, 2.00 1.00 20.00 5.00, 4.00 2.00 30.00 5.00, 5.00 4.00 40.00 5.00)"
[1] "LINESTRING (-116.4 45.2, -118.0 47.0)"
[1] "LINESTRING (-116.4 45.2, -118.0 47.0, -120.0 49.0)"
[1] "LINESTRING Z(-116.4 45.2 46.0, -118.0 47.0 41.0, -120.0 49.0 41.0)"
[1] "LINESTRING M(-116.4 45.2 46.0, -118.0 47.0 41.0, -120.0 49.0 41.0)"
[1] "LINESTRING ZM(-116.4 45.2 46.0 0.2, -118.0 47.0 41.0 0.0, -120.0 49.0 41.0 0.3)"
[1] "LINESTRING (-116.4 45.2, -118.0 47.0)"
[1] "LINESTRING (-116.4 45.2, -118.0 47.0, -120.0 49.0)"
[1] "POLYGON Z((45.20 49.00 41.00, 47.00 46.00 41.00))"
[1] "POLYGON M((45.20 49.00 41.00, 47.00 46.00 41.00))"
[1] "POLYGON ZM((-116.40 45.20 46.00 0.20, -118.00 47.00 41.00 0.00, -120.00 49.00 41.00 0.30))"
[1] "LINESTRING (100.00 0.00, 101.00 1.00)"
[1] "LINESTRING Z(100.00 0.00 1.00, 101.00 0.00 1.00, 101.00 1.00 1.00, 100.00 0.00 1.00)"
[1] "LINESTRING M(100.00 0.00 1.00, 101.00 0.00 1.00, 101.00 1.00 1.00, 100.00 0.00 1.00)"
[1] "LINESTRING ZM(100.00 0.00 1.00 40.00, 101.00 0.00 1.00 44.00, 101.00 1.00 1.00 45.00, 100.00 0.00 1.00 49.00)"
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