crs_engine: Default coordinate transform engine

In paleolimbot/crs2crs: Generic Coordinate System Transforms

Description

Default coordinate transform engine

Usage

crs_engine(env = parent.frame())

crs_set_engine(engine, env = parent.frame())

with_crs_engine(engine, expr, env = parent.frame())

is_crs_engine(engine, env = parent.frame())

Arguments

env	The environment to look for named functions if the engine option is a string.
engine	A transform engine such as crs_engine_null()
expr	The expression to evaluate with the transform engine

Value

• crs_engine() returns the current default transform engine

• crs_set_engine() returns the previously set default transform engine

• with_crs_engine() returns the result of expr

Examples

crs_engine()
prev_engine <- crs_set_engine(crs_engine_identity())
# ...
crs_set_engine(prev_engine)

with_crs_engine(crs_engine_identity(), {
  # ...
})

paleolimbot/crs2crs documentation built on Jan. 8, 2022, 6:25 a.m.