crs_engine_null: Generic Coordinate Transform Engines

In paleolimbot/crs2crs: Generic Coordinate System Transforms

Description

Generic Coordinate Transform Engines

Usage

crs_engine_null()

crs_engine_identity(quiet = FALSE)

crs_engine_get_wk_trans(engine, handleable, crs_to, crs_from, ...)

crs_engine_transform(
  engine,
  handleable,
  crs_to,
  crs_from = wk::wk_crs(handleable),
  ...
)

crs_engine_proj_pipeline(
  engine,
  handleable,
  crs_to,
  crs_from = wk::wk_crs(handleable),
  ...
)

crs_engine_proj_pipeline_apply(engine, handleable, pipeline, ...)

crs_engine_set_longlat(engine, handleable, datum = NULL)

## Default S3 method:
crs_engine_transform(
  engine,
  handleable,
  crs_to,
  crs_from = wk::wk_crs(handleable),
  ...
)

## S3 method for class 'crs2crs_engine_null'
crs_engine_transform(
  engine,
  handleable,
  crs_to,
  crs_from = wk::wk_crs(handleable),
  ...
)

## S3 method for class 'crs2crs_engine_identity'
crs_engine_get_wk_trans(
  engine,
  handleable,
  crs_to,
  crs_from = wk::wk_crs(handleable),
  ...
)

## Default S3 method:
crs_engine_set_longlat(engine, handleable, datum = NULL)

Arguments

quiet	Use TRUE to silence warnings about the dummy identity transform
engine	A transform engine such as crs_engine_null()
handleable	A geometry vector (e.g., wkb(), wkt(), xy(), rct(), or sf::st_sfc()) for which wk_handle() is defined.
crs_from, crs_to	Source and destination coordinate reference systems
...	engine-specific transformation options
pipeline	A character vector representing a PROJ coordinate operation
datum	A crs or datum (e.g., WGS84) to use for a long/lat definition

Value

• crs_engine_null() returns an engine that errors on any attempt to perform a coordinate transform.

• crs_get_wk_trans() returns a wk_trans that can be used to transform handleable.

• crs_engine_transform() returns a modified version of handleable with the transform applied.

• crs_engine_proj_pipeline() returns a string representing the pipeline transformation that can be passed to crs_engine_proj_pipeline_apply()

• crs_engine_proj_pipeline_apply() Returns a transformed version of handleable with a NULL CRS.

Examples

crs_engine_null()
crs_transform(
  wk::xy(1, 1), "some_crs",
  engine = crs_engine_identity()
)

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