BIM-GPS Map Integration to AR Platform

Project Title

Server-Based BIM + GPS Map → AR Visualization Platform (Navisworks, Multi-User)

Project Overview

We are looking for an experienced developer or small team to build a server-based BIM visualization platform with GPS-based map navigation and AR 3D visualization.

The system must allow users to:

Navigate a project on a map by GPS coordinates (similar to Google Earth / GIS view)

Select a location or area on the map

Seamlessly switch to 3D visualization / AR view of the same location using a smartphone camera

This is an industrial project (gas processing plant) using a large Navisworks NWD model (~1 GB).

Critical requirement:
The BIM model must NOT be downloaded to phones.
All heavy processing and rendering must be done on a server.

Core Functional Requirements
1. GPS / Map-Based Navigation (2D)

Web-based map interface (Google Maps / Mapbox / Cesium / similar)

Display project layout aligned to real-world GPS coordinates

Ability to:

zoom / pan

select zones or points

see project elements overlaid on the map

Map view acts as entry point to 3D/AR visualization

2. 3D / AR Visualization

Live camera view on smartphone

3D BIM model overlaid on real environment

Transition from map → 3D must keep same coordinates

Target alignment accuracy: ~10 cm

Calibration via:

survey control points / RTK (preferred)

markers acceptable for initial phase

3. Architecture (Mandatory)

Server-side rendering

WebRTC / Pixel Streaming or equivalent

Browser-based client (no app install preferred)

One server → many users

Client side:

camera

sensors

basic UI only

4. Multi-User

Target: ~20 concurrent users

Session isolation

Stable performance

5. Model Handling

Input: Navisworks NWD

Geometry optimization:

remove micro-details

LOD generation

segmentation by zones

Optimized for real-time rendering

6. Security

BIM data stored only on server

No file download on client

Token / session-based access

Project Structure (Important)

We expect the project to be executed in phases, starting with a small pilot, then scaling up.

Phase 1 – Pilot

One selected zone

Basic map → 3D transition

Server rendering proof

Test on 2–3 phones

Phase 2 – Full System

Full model

Multi-user

Production-ready deployment

Time & Budget

Hours: Open (to be proposed by freelancer)

Budget: Open (hourly or milestone-based)

We will evaluate proposals based on:

technical understanding

architecture decisions

efficiency (not just price)

Required Experience

We prefer developers with experience in at least two of the following:

BIM / Navisworks / IFC

Unity or Unreal Engine

WebRTC / Pixel Streaming

GIS / GPS / Map-based systems

ARCore / ARKit

Server-side GPU rendering

This project is suitable for experienced Indian developers or teams with strong technical background and cost-effective delivery.

No mobile-only AR
No “download BIM to phone” solutions
No generic AR demos

To Apply (Mandatory)

Please include:

Brief explanation of how you would implement:

GPS map navigation

transition to 3D / AR

Proposed tech stack

Relevant past project (link / video / description)

Estimated hours for Phase 1 (Pilot)

Confirmation that rendering will be server-side

Proposals without these points will not be considered.

Long-Term Opportunity

This is not a one-off demo.
Successful delivery may lead to:

long-term cooperation

additional industrial projects

scaling the platform further