npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

japan-geoid

v0.4.2

Published

Calculates geoid heights for Japan using GSI's geoid model.

Downloads

13

Readme

japan-geoid

Test Maturin codecov Crates.io Version PyPI - Version NPM Version

A library for calculating geoid heights in Japan using GSI's geoid model. It is implemented in Rust and additionally supports Python and JavaScript. The library contains geoid data based on GSIGEO2011 (gsigeo2011_ver2_2.asc), created with the permission: 「測量法に基づく国土地理院長承認(使用)R 5JHs 560」.

日本のジオイド高を計算するためライブラリです。Rust で実装されており、Python と JavaScript (Wasm) でも利用できます。国土地理院のジオイドモデル「日本のジオイド2011」を用いて、国土地理院による C++ のサンプルコードに準拠した補間計算を行います。本ライブラリには、日本のジオイド2011 v.2.2 (gsigeo2011_ver2_2.asc) を元にしたジオイドデータが同梱されています(測量法に基づく国土地理院長承認(使用)R 5JHs 560)。

License: MIT

本ライブラリは、国土地理院が提供するものではありません。

Python

Installation

pip install japan-geoid -U

Usage

from japan_geoid import load_embedded_gsigeo2011

# Load the embedded GSIGEO2011 model.
geoid = load_embedded_gsigeo2011()

# Calculate the geoid height.
(lng, lat) = (138.2839817085188, 37.12378643088312)
height = geoid.get_height(lng, lat)
print(f"{lng=} {lat=} {height=}")

# Returns NaN if the input is outside the domain.
geoid.get_height(10.0, 10.0)) # => nan

# The library also works with Numpy.
import numpy as np
geoid.get_heights(
    np.array([138.2839817085188, 141.36199967724426]),
    np.array([37.12378643088312, 43.06539278249951]),
)

Rust

Installation

cargo add japan-geoid

Usage

use japan_geoid::gsi::load_embedded_gsigeo2011;
use japan_geoid::Geoid;

fn main() {
    // Load the embedded GSIGEO2011 model.
    let geoid = load_embedded_gsigeo2011();

    // Calculate the geoid height.
    let (lng, lat) = (138.2839817085188, 37.12378643088312);
    let height = geoid.get_height(lng, lat);
    println!("Input: (lng: {lng}, lat: {lat}) -> Geoid height: {height}");

    // Returns NaN if the input is outside the domain.
    assert!(f64::is_nan(geoid.get_height(10.0, 10.0)))
}

JavaScript (Wasm) - Experimental

Installation

npm add japan-geoid

Usage

import init, { loadEmbeddedGSIGEO2011 } from "japan-geoid";

await init(); // load .wasm

const geoid = loadEmbeddedGSIGEO2011();

console.log(
  geoid.getHeight(138.2839817085188, 37.12378643088312)
); // => 39.47387115961899

console.log(
  geoid.getHeights(
    [138.2839817085188, 141.36199967724426],
    [37.12378643088312, 43.06539278249951]
  )
); // => Float64Array(2) [ 39.47387115961899, 31.90071200378531 ]

Build

wasm-pack build -t web

License

MIT License

測量法に基づく国土地理院長承認(使用)R 5JHs 560

Authors