Crate libisg

Library that reading/writing ISG-format.

use std::fs;

use libisg;
use libisg::{Data, DataBounds, ISG};


let s = fs::read_to_string("Example 1.isg").unwrap();

let isg = libisg::from_str(&s).unwrap();

// use data
let (a_max, b_max, delta_a, delta_b) = match isg.header.data_bounds {
    DataBounds::GridGeodetic { lat_max, lon_max, delta_lat, delta_lon, .. } => {
        (lat_max, lon_max, delta_lat, delta_lon)
    },
    _ => unimplemented!("`Example 1.isg` is grid geodetic"),
};

match &isg.data {
    Data::Grid(data) => {
        for (nrow, row) in data.iter().enumerate() {
            for (ncol, value) in row.iter().enumerate() {
                let a = a_max - delta_a * nrow;
                let b = b_max + delta_b * ncol;
                // do something
            }
        }
    }
    Data::Sparse(data) => {
        for row in data {
            let (a, b, value) = row;
            // do something
        }
    }
}

Serialize/Deserialize

ISG format

Use from_str and to_string fns.

use std::fs;
use libisg;


let s = fs::read_to_string("Example 1.isg").unwrap();

// deserialize
let isg = libisg::from_str(&s).unwrap();

// serialize
assert_eq!(s, libisg::to_string(&isg));

serde

ISG supports serde protocol.

use std::fs;
use serde_json;
use libisg;


let s = fs::read_to_string("Example 1.isg").unwrap();
let isg = libisg::from_str(&s).unwrap();

// serialize
let json = serde_json::to_string(&isg).unwrap();

// deserialize
assert_eq!(isg, serde_json::from_str(&json).unwrap());

Notes

• libisg’s support of arithmetic on Coord is very minimal/basic, consider to use other crates

Structs

CreationDate

Value of creation date

Header

Header section of ISG.

ISG

ISG format.

ParseError

Error on parsing ISG format

ParseValueError

Error on parsing header value of ISG format

ValidationError

Error on validation

Enums

Coord

Represents Coordinate

CoordType

Value of coord type

CoordUnits

Value of coord units

Data

Data section of ISG.

DataBounds

Bounds and delta (lat min etc.)

DataFormat

Value of data format

DataOrdering

Value of data ordering

DataType

Value of data type

DataUnits

Value of data units

ModelType

Value of model type

TideSystem

Value of tide system

Functions

from_str

Deserialize ISG-format.

to_string

Serialize ISG to String.