modern parser & stringifier for WKT, EWKT, and GeoJSON

Last update: Sep 3, 2022

Related tags

Overview

betterknown

betterknown development is supported by 🌎 placemark.io

I wrote wellknown, a WKT parser and stringifier, eons ago. It's still sort of popular but nobody maintained it after I left Mapbox.

There's wkx, which is stricter and honestly has a better parser, plus supports WKB, but it's also abandoned and has some drawbacks - no TypeScript, somewhat idiosyncratic code, and the bundle size is larger than it needs to be because it brings in browserify shims.

This project aims to be the combination of the two projects. Lightweight like wellknown, strict and correct like wkx, plus with the 2022 energy of supporting TypeScript from day one.

100% TypeScript
No dependencies - tiny bundle
Parse WKT to GeoJSON, stringify GeoJSON to WKT
Optional reprojection of EWKT to GeoJSON's required WGS84 coordinate system

📕 Documentation

Example

import { wktToGeoJSON, geoJSONToWkt } from "betterknown";
import proj4 from "proj4";

// Converting & reprojecting an EWKT string
wktToGeoJSON(`SRID=3857;POINT(-400004.3 60000.1)`, {
  proj: proj4,
});

// Converting GeoJSON to WKT
geoJSONToWkt({
  type: 'Point',
  coordinates: [1, 2]
});

geotiff.js is a small library to parse TIFF files for visualization or analysis. It is written in pure JavaScript, and is usable in both the browser and node.js applications.

geotiff.js Read (geospatial) metadata and raw array data from a wide variety of different (Geo)TIFF files types. Features Currently available function

Dec 21, 2022

Comments

Define handling of SRID
GeoJSON as of the IETF draft does not support non-WGS84 coordinates. https://www.rfc-editor.org/rfc/rfc7946#section-4

So, deal with what to do with SRID.

My preference:

Allow an option for projection method, if given, reproject, otherwise throw.
opened by tmcw 0
Detect and handle heterogenous coordinates
GeoJSON that can exist:

{ "type": "LineString", "coordinates": [[0, 1, 2], [2, 3]] }

Should this be a LINESTRING or LINESTRING Z in WKT? Probably just a LINESTRING. This should be detected and handled explicitly.
opened by tmcw 0

Releases(v1.0.3)

v1.0.3(Aug 24, 2022)

This is most likely the last release of betterknown before its announcement, so it's basically the "first state" of the module and its best description is simply what's in the README.

https://github.com/placemark/betterknown/compare/v1.0.2...v1.0.3
Source code(tar.gz)
Source code(zip)

modern parser & stringifier for WKT, EWKT, and GeoJSON

Related tags

Overview

betterknown

📕 Documentation

Example

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Comments

Define handling of SRID

Detect and handle heterogenous coordinates

Releases(v1.0.3)

v1.0.3(Aug 24, 2022)

Owner

Placemark

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