@loaders.gl/gis

What is @loaders.gl/gis?

@loaders.gl/gis is a part of the loaders.gl suite, designed to handle geospatial data. It provides utilities for parsing, transforming, and working with various geospatial data formats, making it easier to integrate and manipulate GIS data in web applications.

What are @loaders.gl/gis's main functionalities?

Parsing GeoJSON

This feature allows you to parse GeoJSON data into a JavaScript object. The code sample demonstrates how to use the `parse` function to convert a GeoJSON string into a usable object.

const { parse } = require('@loaders.gl/gis');
const geojson = '{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Point", "coordinates": [102.0, 0.5]}, "properties": {"prop0": "value0"}}]}';
const parsedData = parse(geojson, { mimeType: 'application/json' });
console.log(parsedData);

Transforming Coordinates

This feature allows you to transform coordinates from one spatial reference system to another. The code sample shows how to transform coordinates from EPSG:4326 to EPSG:3857.

const { transform } = require('@loaders.gl/gis');
const coordinates = [102.0, 0.5];
const transformedCoordinates = transform(coordinates, 'EPSG:4326', 'EPSG:3857');
console.log(transformedCoordinates);

Handling Shapefiles

This feature allows you to load and parse shapefiles. The code sample demonstrates how to use the `load` function with the `ShapefileLoader` to load a shapefile from a URL.

const { load } = require('@loaders.gl/core');
const { ShapefileLoader } = require('@loaders.gl/shapefile');
const url = 'path/to/shapefile.zip';
load(url, ShapefileLoader).then(data => console.log(data));

Other packages similar to @loaders.gl/gis

terraformer

Terraformer is a JavaScript library for working with GeoJSON, features, and geometry objects. It provides tools for parsing, converting, and manipulating geospatial data. Compared to @loaders.gl/gis, Terraformer focuses more on GeoJSON and geometry operations but lacks built-in support for other geospatial formats like shapefiles.

geobuf

Geobuf is a compact binary encoding for GeoJSON, allowing for efficient storage and transmission of geospatial data. It is useful for scenarios where bandwidth or storage is a concern. While @loaders.gl/gis provides broader functionality for various geospatial formats, Geobuf specializes in compact encoding of GeoJSON.

shapefile

The shapefile package is a JavaScript library for reading ESRI Shapefiles in the browser and Node.js. It provides functionality to parse shapefiles and convert them to GeoJSON. Compared to @loaders.gl/gis, the shapefile package is more specialized in handling shapefiles but does not offer the same breadth of geospatial data format support.

README

@loaders.gl/gis

This module contains helper classes for the GIS category of loaders.

loaders.gl is a collection of framework-independent visualization-focused loaders (parsers).

Changelog

v4.2.0-alpha.4

• fix(tile-converter): compose SLPK hash file (#2895)
• chore(i3s examples): Add i3s picking example (#2886)