Xneek-gpx NPM | npm.io

xneek-gpx

A set of tools for compressing/decompressing gpx tracks. And helper functions to compress numeric sequences into a small string

Prerequisites

This project requires NodeJS (version 8 or later) and NPM. Node and NPM are really easy to install. To make sure you have them available on your machine, try running the following command.

$ npm -v && node -v
6.4.1
v8.16.0

Project Name

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Installation

BEFORE YOU INSTALL: please read the prerequisites

Start with cloning this repo on your local machine:

$ git clone https://github.com/xneek/xneek-gpx.git
$ cd xneek-gpx

To install and set up the library, run:

$ npm install xneek-gpx

Or if you prefer using Yarn:

$ yarn add xneek-gpx

Usage

Running the tests

$ npm run test

Building a distribution version

$ npm run build

This task will create a distribution version of the project inside your local lib/ folder

Note this requires Building a distribution version first.

API

encodeNumbersSequence

encodeNumbersSequence(numbersSequence: number[])

Encodes a one-dimensional array of numbers (vector) into a string. Both integer and floating point numbers up to 5 decimal places are allowed Example:

    const seqString = encodeNumbersSequence([53.14299, 53.14238, 53.14184, 53.14128, 53.14067, 53.14003, 53.13944, 53.13885, 53.13828, 53.13767, 53.13705]);
    // returns: unjcIxBjBnBxB~BtBtBpBxBzB

decodeNumbersSequence

decodeNumbersSequence(encodedNumbersSequenceStr: string)

Decodes a string into a one-dimensional array of numbers (vector).

    const seq = decodeNumbersSequence('unjcIxBjBnBxB~BtBtBpBxBzB');
    // returns: [53.14299, 53.14238, 53.14184, 53.14128, 53.14067, 53.14003, 53.13944, 53.13885, 53.13828, 53.13767, 53.13705]