Compute segment coordinates and orientations — TNETshape

This function will calculate the center point of each segment and it's orientation with north. More info in the Details section.

Usage

TNETshape_computePosition(path_segments, path_nodes, path_export)

Arguments

path_segments: string Path to the shapefile with segments.
export_file: string Path to the shapefile with results to create.
path_node: string Path to the shapefile with all segments nodes.

Value

None.

Details

Both position and orientation are calculated using the line between the initial and final node, called later the simplified segment (dashed on the figure below). There are symbolized in the following figure and explain below:

1 - Position

Position is taken as the middle point of the simplified segment. It's converted in WGS84.

2 - Orientation

Orientation is take as the angle between North and the oriented simplified segment, in Degrees.

Orientation	Water direction in the segment
0°	North
180°	South
90°	East
270°	West

Examples

## Run directly the function providing all info
TNETshape_computePosition(path_segments = "path/to/segments.shp",
                          path_node = "path/to/nodes.shp",
                          export_file = "path/to/exportFolder")
#> Error: Cannot open "path/to/segments.shp"; The file doesn't seem to exist.