knitr::opts_chunk$set(collapse = TRUE, comment = "#>") options(knitr.table.format = "html", rmarkdown.html_vignette.check_title = FALSE) library(eRTG3D) set.seed(123)
The sf
package delivers a standardized way to encode spatial vector data, the so called Simple Features (SF). It binds to GDAL for reading and writing data, to GEOS for geometrical operations, and to Proj.4 for projection conversions and datum transformations. Therefore the eRTG3D
package comes with some wrapper functions to convert the generated tracks to simple features. The resulting sf, data.frame
objects enable access to the functionality of the sf package, which also includes an easy way to access spatial databases (PostGIS).
To convert tracks to a an object of type sf, data.frame
use the track2sf.3d()
function, which can take data.frames, matrices and move objects (containing one track!) as input. In case of data.frames and matrices, it is important that the coordinates are stored in the first three rows.
niclas <- track2sf.3d(niclas, CRS = 2056) is.sf.3d(niclas) head(niclas, 3)
To test if a track is of type sf, data.frame
use the is.sf()
function, and to convert a sf, data.frame
back to a track data.frame use sf2df.3d()
.
niclas <- sf2df.3d(niclas) is.sf.3d(niclas)
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