create.points.by.offset: Create point dataframe offset from line
Description
For a set of observations with x,y locations on the line and a perpendicular
distance, create a new observation dataframe with true x,y point locations.
Usage
create.points.by.offset(lines, observations)
Arguments
lines
- data frame of lines with the following structure
label - unique label
x0 - x coordinate of beginning of line
y0 - y coordinate of beginning of line
x1 - x coordinate of end of line
observations
- data frame of observations with the following structure
label - label linking it to a unique line
x - x coordinate
y - y coordinate
distance- perpendicular distance;