changeproj-prevR-method: Convert map projection of a object of class prevR.

In prevR: Estimating Regional Trends of a Prevalence from a DHS and Similar Surveys

Convert map projection of a object of class prevR.

Description

This function converts map projection (and/or datum) used by an object of class prevR into another one.

Usage

## S4 method for signature 'prevR'
changeproj(object, proj)

Arguments

object	object of class prevR.
proj	new map projection. One of (i) character: a string accepted by GDAL, (ii) integer, a valid EPSG value (numeric), or (iii) an object of class crs, see sf::st_crs().

Details

changeproj() transform the columns "x" and "y" of the slot clusters of object and convert boundary using the new map projection defined by proj.

If applicable, the slot rings will be recalculated.

Value

Return object expressed in the projection proj.

See Also

sf::st_transform(), prevR

Examples

print(fdhs)
plot(fdhs, axes = TRUE, main = "Projection: longitude/latitude")

fdhs2 <- changeproj(
  fdhs,
  "+proj=utm +zone=30 +ellps=WGS84 +datum=WGS84 +units=m +no_defs"
)
print(fdhs2)
plot(fdhs2, axes = TRUE, main = "Projection: UTM Zone 30")

prevR documentation built on May 31, 2023, 7:32 p.m.