XYZ to GeoJSON Converter - Proof of Concept

A Node.js function that converts survey coordinate data (XYZ format) to standard GeoJSON FeatureCollection with coordinate system transformation using proj4js.

Quick Start

npm install
node main.js

What This Demonstrates

• Parsing: Handles space/comma/tab-separated XYZ data
• Transformation: Uses proj4js for coordinate system conversion
• Output: Standard GeoJSON FeatureCollection format
• Robustness: Error handling, validation, preserves source data

Example

Input (XYZ - UTM Zone 15N):

440287.50 4431748.25 125.3
440291.20 4431752.80 126.1
440295.10 4431757.50 124.8

Output (GeoJSON - WGS84):

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [-93.699, 40.033, 125.3]
      },
      "properties": {
        "originalX": 440287.5,
        "originalY": 4431748.25,
        "originalZ": 125.3
      }
    }
  ]
}

Technical Approach

Core Function

xyzToGeoJSON(xyzData, fromProjection, toProjection, options)

Architecture

1. Parse: Multi-format support (space, comma, tab delimiters)
2. Validate: Skip invalid lines with warnings
3. Transform: Batch process using proj4js
4. Output: Standard GeoJSON with source data preservation

Performance Features

• Batch processing for large datasets (configurable chunk size)
• Memory-efficient streaming approach
• Error handling per point (doesn't fail entire dataset)

Next Steps for Production

• Vertical datum transformation (NAVD88 → WGS84 using geoid models)
• Support for additional CRS formats (PROJ.4 strings, WKT)
• Performance optimization for million+ point datasets
• Comprehensive test suite
• CLI interface for batch file processing