geotoolbox@3

geotoolbox is a javascript tool for geographers. It allows one to manage GeoJSON properties (attribute data) and provides several useful GIS operations for thematic cartography. The aim of geotoolbox is to offer functions designed to handle geoJSON directly, not just single features or geometries. As a result, the library is particularly user-friendly for users with little experience of javascript development. From a technical point of view, geotoolbox is largely based on geos-wasm GIS operators (a big thanks to Christoph Pahmeyer 🙏), but also on d3.geo and topojson. Geotoolbox also works well with other cartographic libraries such as geoviz and bertin.js. Note that there are other GIS libraries like turf.js, which is really great.

➡️ Installation

• CDN

<script src="https://cdn.jsdelivr.net/npm/geotoolbox@3" charset="utf-8"></script>

• npm

npm install geotoolbox@3

• Observable notebooks

geo = require("geotoolbox@3");

➡️ Usage

Most functions take the same type of argument as input - a dataset and options - like geotoolbox.myfunction(data, {options}). Please note that functions based on geos-wasm are asynchronous.

• A buffer example

const mybyffer = await geotoolbox.buffer(data, {dist: 1000});

• Data handling example (add a field in a geoJSON)

geotoolbox.derive(data, {
  field: "gdppc", // the name of the new field
  value: "gdp/pop*1000", // a function to calculate the value
  mutate: true // to update the dataset
});

• Tests if two geometries intersect

geotoolbox.intersects(data1, data2);

➡️ How it works?

See documentation api: https://riatelab.github.io/geotoolbox