Module las::header
[−]
[src]
A Header
describes the configuration and properties of las data.
Reading
A Reader
uses a Header
to expose metadata:
use las::Reader; let reader = Reader::from_path("tests/data/autzen.las").unwrap(); let header = reader.header(); println!("The file has {} points.", header.number_of_points());
Writing
A Writer
uses a header to configure how it will write points. To create a las file, you can
use a Header
from another file, use the default Header
, or create one with a Builder
:
use std::io::Cursor; use las::{Writer, Builder, Reader, Header}; // Copy the configuration from an existing file. let header = Reader::from_path("tests/data/autzen.las").unwrap().header().clone(); let writer = Writer::new(Cursor::new(Vec::new()), header).unwrap(); // Use the default configuration, which writes to a `Cursor<Vec<u8>>`. let writer = Writer::default(); // Set your own configuration with a `Builder`. let mut builder = Builder::from((1, 4)); builder.system_identifier = "Synthetic points".to_string(); let header = builder.into_header().unwrap(); let writer = Writer::new(Cursor::new(Vec::new()), header).unwrap();
Into raw bytes
A Header
has a method to turn it into a raw::Header
, which maps directly onto the bytes of
the las spec:
use las::Header; let header = Header::default(); let raw_header = header.into_raw().unwrap(); assert_eq!(b"LASF", &raw_header.file_signature);
Structs
Builder |
Builds headers. |
Header |
Metadata describing the layout, source, and interpretation of the points. |
Vlrs |
An iterator over a header's variable length records. |
Enums
Error |
Header-specific errors. |