cartesian: To convert from Geographic coordinate to Cartesian...

In diegoalarc/GeodesiCL: Geometric Geodesy Functions

To convert from Geographic coordinate to Cartesian coordinate.

Description

With this function it is possible to convert from Geographic coordinate to Cartesian coordinate and obtain the decimal precision that you assign.

Usage

cartesian(a, longlat_df, digits = 4)

Arguments

a	Selection of Ellipsoid.
longlat_df	Point name, Sexagesimal longitude and latitude as dataframe.
digits	Number of digits are rounded to. DEFAULT: 4

Value

data.frame with the data in the following order: "Pt", "X", "Y", "Z".

Note

create data frame of epsg codes by epsg <- rgdal::make_EPSG()

References

https://github.com/OSGeo/PROJ & https://github.com/cran/rgdal

Examples

# Point name
Pto <- "St1"

# Longitude
g <- -71
m <- 18
s <- 44.86475

# Value in sexagesimal
sexa_long <- sexagesimal(g,m,s)

# Latitude
g <- -33
m <- 38
s <- 30.123456

# Value in sexagesimal
sexa_lat <- sexagesimal(g, m, s)
print(sexa_lat)

# ELLIPSOIDAL HEIGHT (h)
h <- 31.885

# Longitude and Latitude as data.frame
longlat_df <- data.frame(Pto, sexa_long, sexa_lat, h)

# To know the ellipsoids and the order open the Ellipsoids in the package
# and look for it number
Ellip <- Ellipsoids
#View(Ellip)

# We choose the number 5 which is GRS80
value <- cartesian(5, longlat_df, digits = 4)
print(value)

diegoalarc/GeodesiCL documentation built on July 24, 2022, 9:14 p.m.