/
erase_polygon_from_lidar.rs
executable file
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/
erase_polygon_from_lidar.rs
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/*
This tool is part of the WhiteboxTools geospatial analysis library.
Authors: Dr. John Lindsay
Created: 25/04/2018
Last Modified: 12/10/2018
License: MIT
*/
use whitebox_common::algorithms;
use whitebox_lidar::*;
use whitebox_common::structures::{BoundingBox, Point2D, Point3D};
use crate::tools::*;
use whitebox_vector::{ShapeType, Shapefile};
use std::env;
use std::io::{Error, ErrorKind};
use std::path;
/// This tool can be used to remove, or erase, all of the LiDAR points in a LAS file (`--input`) contained within
/// one or more vector polygon features. The user must specify the name of the input clip file (--polygons), which
/// must be a vector of a Polygon base shape type. The clip file may contain multiple polygon features and polygon hole
/// parts will be respected during clipping, i.e. LiDAR points within polygon holes will be remain in the output LAS
/// file.
///
/// Use the `ClipLidarToPolygon` tool to perform the complementary operation of clipping (isolating) points from a LAS file
/// that are contained within a set of polygons, while removing points that lie outside the input polygons.
///
/// # See Also
/// `ClipLidarToPolygon`, `FilterLidar`, `Clip`, `ClipRasterToPolygon`
pub struct ErasePolygonFromLidar {
name: String,
description: String,
toolbox: String,
parameters: Vec<ToolParameter>,
example_usage: String,
}
impl ErasePolygonFromLidar {
/// public constructor
pub fn new() -> ErasePolygonFromLidar {
let name = "ErasePolygonFromLidar".to_string();
let toolbox = "LiDAR Tools".to_string();
let description =
"Erases (cuts out) a vector polygon or polygons from a LiDAR point cloud.".to_string();
let mut parameters = vec![];
parameters.push(ToolParameter {
name: "Input File".to_owned(),
flags: vec!["-i".to_owned(), "--input".to_owned()],
description: "Input LiDAR file.".to_owned(),
parameter_type: ParameterType::ExistingFile(ParameterFileType::Lidar),
default_value: None,
optional: false,
});
parameters.push(ToolParameter {
name: "Input Vector Polygon File".to_owned(),
flags: vec!["--polygons".to_owned()],
description: "Input vector polygons file.".to_owned(),
parameter_type: ParameterType::ExistingFile(ParameterFileType::Vector(
VectorGeometryType::Polygon,
)),
default_value: None,
optional: false,
});
parameters.push(ToolParameter {
name: "Output File".to_owned(),
flags: vec!["-o".to_owned(), "--output".to_owned()],
description: "Output LiDAR file.".to_owned(),
parameter_type: ParameterType::NewFile(ParameterFileType::Lidar),
default_value: None,
optional: false,
});
let sep: String = path::MAIN_SEPARATOR.to_string();
let e = format!("{}", env::current_exe().unwrap().display());
let mut parent = env::current_exe().unwrap();
parent.pop();
let p = format!("{}", parent.display());
let mut short_exe = e
.replace(&p, "")
.replace(".exe", "")
.replace(".", "")
.replace(&sep, "");
if e.contains(".exe") {
short_exe += ".exe";
}
let usage = format!(">>.*{0} -r={1} -v --wd=\"*path*to*data*\" -i='data.las' --polygons='lakes.shp' -o='output.las'", short_exe, name).replace("*", &sep);
ErasePolygonFromLidar {
name: name,
description: description,
toolbox: toolbox,
parameters: parameters,
example_usage: usage,
}
}
}
impl WhiteboxTool for ErasePolygonFromLidar {
fn get_source_file(&self) -> String {
String::from(file!())
}
fn get_tool_name(&self) -> String {
self.name.clone()
}
fn get_tool_description(&self) -> String {
self.description.clone()
}
fn get_tool_parameters(&self) -> String {
match serde_json::to_string(&self.parameters) {
Ok(json_str) => return format!("{{\"parameters\":{}}}", json_str),
Err(err) => return format!("{:?}", err),
}
}
fn get_example_usage(&self) -> String {
self.example_usage.clone()
}
fn get_toolbox(&self) -> String {
self.toolbox.clone()
}
fn run<'a>(
&self,
args: Vec<String>,
working_directory: &'a str,
verbose: bool,
) -> Result<(), Error> {
let mut input_file = String::new();
let mut polygons_file = String::new();
let mut output_file = String::new();
if args.len() == 0 {
return Err(Error::new(
ErrorKind::InvalidInput,
"Tool run with no parameters.",
));
}
for i in 0..args.len() {
let mut arg = args[i].replace("\"", "");
arg = arg.replace("\'", "");
let cmd = arg.split("="); // in case an equals sign was used
let vec = cmd.collect::<Vec<&str>>();
let mut keyval = false;
if vec.len() > 1 {
keyval = true;
}
let flag_val = vec[0].to_lowercase().replace("--", "-");
if flag_val == "-i" || flag_val == "-input" {
input_file = if keyval {
vec[1].to_string()
} else {
args[i + 1].to_string()
};
} else if flag_val == "-polygon" || flag_val == "-polygons" {
polygons_file = if keyval {
vec[1].to_string()
} else {
args[i + 1].to_string()
};
} else if flag_val == "-o" || flag_val == "-output" {
output_file = if keyval {
vec[1].to_string()
} else {
args[i + 1].to_string()
};
}
}
if verbose {
let tool_name = self.get_tool_name();
let welcome_len = format!("* Welcome to {} *", tool_name).len().max(28);
// 28 = length of the 'Powered by' by statement.
println!("{}", "*".repeat(welcome_len));
println!("* Welcome to {} {}*", tool_name, " ".repeat(welcome_len - 15 - tool_name.len()));
println!("* Powered by WhiteboxTools {}*", " ".repeat(welcome_len - 28));
println!("* www.whiteboxgeo.com {}*", " ".repeat(welcome_len - 23));
println!("{}", "*".repeat(welcome_len));
}
let sep: String = path::MAIN_SEPARATOR.to_string();
let mut progress: usize;
let mut old_progress: usize = 1;
if !input_file.contains(&sep) && !input_file.contains("/") {
input_file = format!("{}{}", working_directory, input_file);
}
if !polygons_file.contains(&sep) && !polygons_file.contains("/") {
polygons_file = format!("{}{}", working_directory, polygons_file);
}
if !output_file.contains(&sep) && !output_file.contains("/") {
output_file = format!("{}{}", working_directory, output_file);
}
if verbose {
println!("Reading data...")
};
let input = match LasFile::new(&input_file, "r") {
Ok(lf) => lf,
Err(err) => panic!("Error reading file {}: {}", input_file, err),
};
let polygons = Shapefile::read(&polygons_file)?;
let num_records = polygons.num_records;
let start = Instant::now();
// make sure the input vector file is of points type
if polygons.header.shape_type.base_shape_type() != ShapeType::Polygon {
return Err(Error::new(
ErrorKind::InvalidInput,
"The input vector data must be of polygon base shape type.",
));
}
// place the bounding boxes of each of the polygons into a vector
let mut bb: Vec<BoundingBox> = Vec::with_capacity(num_records);
for record_num in 0..polygons.num_records {
let record = polygons.get_record(record_num);
bb.push(BoundingBox::new(
record.x_min,
record.x_max,
record.y_min,
record.y_max,
));
}
let mut output = LasFile::initialize_using_file(&output_file, &input);
output.header.system_id = "EXTRACTION".to_string();
let n_points = input.header.number_of_points as usize;
let num_points: f64 = (input.header.number_of_points - 1) as f64; // used for progress calculation only
let mut point_in_poly: bool;
// let mut p: PointData;
let mut p: Point3D;
let mut start_point_in_part: usize;
let mut end_point_in_part: usize;
for point_num in 0..n_points {
// p = input.get_point_info(point_num);
p = input.get_transformed_coords(point_num);
point_in_poly = false;
for record_num in 0..polygons.num_records {
if bb[record_num].is_point_in_box(p.x, p.y) {
// it's in the bounding box and worth seeing if it's in the enclosed polygon
let record = polygons.get_record(record_num);
for part in 0..record.num_parts as usize {
if !record.is_hole(part as i32) {
// not holes
start_point_in_part = record.parts[part] as usize;
end_point_in_part = if part < record.num_parts as usize - 1 {
record.parts[part + 1] as usize - 1
} else {
record.num_points as usize - 1
};
if algorithms::point_in_poly(
&Point2D { x: p.x, y: p.y },
&record.points[start_point_in_part..end_point_in_part + 1],
) {
point_in_poly = true;
break;
}
}
}
for part in 0..record.num_parts as usize {
if record.is_hole(part as i32) {
// holes
start_point_in_part = record.parts[part] as usize;
end_point_in_part = if part < record.num_parts as usize - 1 {
record.parts[part + 1] as usize - 1
} else {
record.num_points as usize - 1
};
if algorithms::point_in_poly(
&Point2D { x: p.x, y: p.y },
&record.points[start_point_in_part..end_point_in_part + 1],
) {
point_in_poly = false;
break;
}
}
}
}
}
if !point_in_poly {
output.add_point_record(input.get_record(point_num));
}
if verbose {
progress = (100.0_f64 * point_num as f64 / num_points) as usize;
if progress != old_progress {
println!("Progress: {}%", progress);
old_progress = progress;
}
}
}
let elapsed_time = get_formatted_elapsed_time(start);
if verbose {
println!("Writing output LAS file...");
}
let _ = match output.write() {
Ok(_) => {
if verbose {
println!("Complete!")
}
}
Err(e) => println!("error while writing: {:?}", e),
};
if verbose {
println!(
"{}",
&format!("Elapsed Time (excluding I/O): {}", elapsed_time)
);
}
Ok(())
}
}