get_shapes_sf: Convert GTFS Shapes Table to Simple Features (sf) Format

In GTFSwizard: Exploring and Manipulating 'GTFS' Files

Convert GTFS Shapes Table to Simple Features (sf) Format

Description

'get_shapes_sf' converts the shapes table in a 'wizardgtfs' object into a simple features ('sf') object, making it suitable for spatial analysis. This function checks and processes the 'shapes' data in the provided GTFS object and structures it as 'LINESTRING' features.

Usage

get_shapes_sf(gtfs)

Arguments

gtfs	A GTFS object containing the 'shapes' table or the shape table itself. If the 'shapes' table is missing, it will be created using 'get_shapes()'.

Details

- When the input 'wizardgtfs' object lacks a 'shapes' table, the function automatically generates one using 'get_shapes()'.

- The 'shapes' table in the GTFS object are transformed into 'LINESTRING' geometries. If 'shape_pt_sequence' is absent, the points are treated as ordered by their position in the data.

- If 'shape_dist_traveled' is available, cumulative distance calculations are included for each shape point.

Value

An 'sf' object with shapes as 'LINESTRING' geometries:

Note

If 'shape_pt_sequence' is missing, the function will assume that points are ordered, constructing the shape accordingly.

See Also

[GTFSwizard::get_shapes()], [GTFSwizard::get_shapes_df()]

Examples

# Convert shapes data in a GTFS object to sf format
gtfs_sf <- get_shapes_sf(for_rail_gtfs)

GTFSwizard documentation built on April 4, 2025, 4:10 a.m.