@bedrock-engineer/bro-xml-parser

TypeScript parser library for Dutch Basisregistratie Ondergrond (BRO) XML data, focussing on geotechnical and geological data.

The BRO contains many registration object types. This library currently only covers three:

1. CPT (Cone Penetration Test)
2. BHR-GT (Geotechnical Borehole)
3. BHR-G (Geological Borehole)

No dependencies in browser. For use in node.js, you need to install two extra dependencies.

Live demo: bro.bedrock.engineer (source)

Pre-1.0: This library is under active development. Minor versions may include breaking changes.

Installation

npm install @bedrock-engineer/bro-xml-parser

# Node.js also requires:
npm install @xmldom/xmldom fontoxpath

Usage

Browser (zero dependencies):

import { BROParser, XMLAdapter } from "@bedrock-engineer/bro-xml-parser";

const parser = new BROParser(new XMLAdapter());
const cpt = parser.parseCPT(xmlText);

Node.js (requires peer deps):

import { BROParser, XMLAdapter } from "@bedrock-engineer/bro-xml-parser/node";

const parser = new BROParser(new XMLAdapter());

// Auto-detect file type
const data = parser.parse(xmlText);
console.log(data.meta.dataType); // 'CPT' | 'BHR-GT' | 'BHR-G'

// Or parse specific types
const cpt = parser.parseCPT(xmlText);
const bhr_gt = parser.parseBHRGT(xmlText);
const bhr_g = parser.parseBHRG(xmlText);

Custom Schemas

Extract only the fields you need:

import {
  BROParser,
  XMLAdapter,
  resolvers,
} from "@bedrock-engineer/bro-xml-parser/node";

const parser = new BROParser(new XMLAdapter());

const mySchema = {
  id: { xpath: "brocom:broId" },
  depth: { xpath: ".//cptcommon:finalDepth", resolver: resolvers.parseFloat },
  location: {
    xpath: "./dscpt:deliveredLocation/cptcommon:location",
    resolver: resolvers.parseGMLLocation,
  },
};

const result = parser.parseCustom(xmlText, mySchema, "CPT");
// { id: "CPT000000099543", depth: 25.5, location: { x: 155000, y: 463000, epsg: "28992" } }

API

Method	Returns	Description
parse(xml)	BROData	Auto-detect type and parse
parseCPT(xml)	CPTData	Parse CPT file
parseBHRGT(xml)	BHRGTData	Parse BHR-GT file
parseBHRG(xml)	BHRGData	Parse BHR-G file
parseCustom(xml, schema, type?)	T	Parse with custom schema

See src/types/index.ts for full type definitions.

Supported Schemas

Type	Schema Version	Link
CPT	dscpt/1.1	BRO CPT docs
BHR-GT	dsbhr-gt/2.1	BRO BHR-GT docs
BHR-G	dsbhrg/3.1	BRO BHR-G docs

Reference Codes

BRO/XML values use camelCase domain codes like "langwerpig", "mechanischDiscontinu", or "ISO19901d8v2014" some are intuitive, some are cryptic. The BRO publishes official human-readable descriptions for all of these codes.

This library exports lookup functions auto-generated from the BRO reference codes API, so you can resolve any code to its full description:

import { getBhrgtGeotechnicalSoilNameDescription } from "@bedrock-engineer/bro-xml-parser/reference-codes";

const bore = parser.parseBHRGT(xmlText);

bore.data.forEach((layer) => {
  const description = getBhrgtGeotechnicalSoilNameDescription(layer.geotechnicalSoilName);
  console.log(`${layer.upperBoundary}–${layer.lowerBoundary}m: ${description}`);
  // e.g. "0–2m: Grove minerale grond, waarvan de grove fractie uit zand bestaat..."
});

Run npm run codegen:reference-codes to regenerate the lookup tables from the latest API.

License

Apache 2.0 — Jules Blom at Bedrock.engineer