Xylem Platform

Xylem is an integrated real estate development platform that helps architects, developers, and planners design, analyze, and optimize building projects. The platform combines GIS mapping, regulatory compliance checking, building simulation, and project management into a single workflow.

What Xylem Does

At its core, Xylem takes a real-world land parcel — usually starting from a surveyor's DWG file — and guides developers through the full lifecycle:

1. Survey Map Ingestion — Upload DWG files, convert them to DXF/GeoJSON, and extract site metadata using AI (Google Gemini)
2. Regulatory Analysis — Check the site against zoning regulations, setback rules, FAR calculations, and authority requirements (BDA, BBMP, etc.)
3. Building Simulation — Generate optimized tower configurations, floorplate layouts, and unit mixes based on constraints
4. Solution Exploration — Visualize solutions in 3D on an interactive map with solar analysis, shadow studies, and performance metrics
5. Project Management — Organize projects within organizations, share with collaborators, and manage variants

System Architecture

The platform is composed of six services, all deployed on a single AWS instance and managed by PM2:

Service	Tech Stack	Domain	Port
Backend API	NestJS, Prisma, PostgreSQL	api.xylem.city	4000
Frontend App	Next.js 15, React 19, Mapbox GL	xylem.city	4801
Admin Panel	React, Vite, ReactFlow	admin.xylem.city	Static
Geo Tile Server	Express, TypeScript, SQLite	geo.xylem.city	4830
Simulation Engine	Python, FastAPI, Shapely, pvlib	—	4902
SME Analyzer	Python, FastAPI, ezdxf, CairoSVG	sme.xylem.city	4802

┌─────────────────────────────────────────────────────────┐
│                     Nginx (Reverse Proxy + SSL)         │
│  xylem.city  admin.xylem.city  api.xylem.city  geo.*   │
└────┬──────────────┬──────────────┬───────────────┬──────┘
     │              │              │               │
┌────▼────┐  ┌──────▼──────┐  ┌───▼───┐    ┌──────▼──────┐
│ Frontend│  │ Admin Panel │  │Backend│    │ Geo Server  │
│ Next.js │  │  Vite SPA   │  │NestJS │    │  Express    │
│ :4801   │  │  (static)   │  │:4000  │    │  :4830      │
└─────────┘  └─────────────┘  └───┬───┘    └─────────────┘
                                  │
                    ┌─────────────┼─────────────┐
                    │             │             │
              ┌─────▼─────┐ ┌────▼────┐ ┌──────▼──────┐
              │ PostgreSQL │ │  Sim    │ │    SME      │
              │  (Prisma)  │ │ Engine  │ │  Analyzer   │
              │            │ │ :4902   │ │  :4802      │
              └────────────┘ └─────────┘ └─────────────┘

Quick Links

• Architecture Overview — Deep dive into the system design
• Deployment Guide — PM2, Nginx, SSL, and domain configuration
• Database Schema — Prisma models and relationships
• Backend API — NestJS modules and endpoints
• Frontend App — Next.js app structure and components
• Admin Panel — Internal admin dashboard pages