gedcom-d3

A parser and converter for GEDCOM (.ged) files, producing D3-capable JSON for genealogy visualization, especially with 3d-force-graph.

• Based on: tmcw/parse-gedcom
• See it in action: oh-kay-blanket/blood-lines

Installation

npm install --save gedcom-d3

API

parse(gedcomString)

• Input: A string containing GEDCOM data.
• Output: An array of parsed GEDCOM objects (tree structure).

d3ize(tree)

• Input: The output of parse() (GEDCOM tree array).
• Output: An object with the following structure:
  • nodes: Array of person nodes, each with properties like id, name, surname, gender, dob, yob, color, bio, etc.
  • links: Array of relationship links (parent/child, spouse, etc.), with source, target, and relationship type.
  • families: Array of family groupings from the GEDCOM data.
  • surnameList: Array of unique surnames with color assignments.

Usage Example

import { parse, d3ize } from 'gedcom-d3'
import gedcomFile from './gedcoms/sample_ancestors.ged'

const tree = parse(gedcomFile)
const d3Data = d3ize(tree)
// d3Data.nodes and d3Data.links can be fed into 3d-force-graph or similar D3 visualizations

Node & Link Structure

Node (Person)

• id: Unique identifier (GEDCOM pointer)
• name: Full name
• firstName, surname: Parsed name parts
• gender: 'M' or 'F'
• dob, yob: Date/year of birth
• dod, yod: Date/year of death
• pob, pod: Place of birth/death
• families: Array of family objects
• color: Assigned color for surname
• bio: Biographical notes (if present)
• ...and more, depending on GEDCOM tags

Link (Relationship)

• source: Source person id
• target: Target person id
• sourceType, targetType: Relationship roles (e.g., 'HUSB', 'WIFE', 'CHIL')
• type: Relationship type (e.g., 'MARR', 'DIV', or parentage)

Updating & Publishing the NPM Package

1. Make your changes

• Edit code, update version in package.json (see semver).

2. Test locally (optional but recommended)

• In another project, run:

  npm install /path/to/gedcom-d3

• Or use npm link for local development.

3. Commit and push your changes

git add .
git commit -m "Describe your changes"
git push

4. Bump the version

• For a patch, minor, or major update:

  npm version patch   # or 'minor' or 'major'
  git push && git push --tags

5. Publish to NPM

• Log in if you haven't:

  npm login

• Publish:

  npm publish

• For scoped packages (not needed here):

  npm publish --access public

6. Verify

• Check your package at npmjs.com/package/gedcom-d3

License

ISC

Contributing

Pull requests and issues welcome! See oh-kay-blanket/gedcom-d3.

Credits

• tmcw/parse-gedcom for the original parser
• vasturiano/3d-force-graph for visualization inspiration
• oh-kay-blanket/blood-lines for implementation example