Scan4D vs Digital ROW Utilities

Scan4D is a professional-grade reality capture app for iPhone and iPad. It turns your device's LiDAR sensor and camera into a powerful 3D scanner, capturing detailed meshes, depth maps, and camera poses for downstream reconstruction, photogrammetry, and spatial computing. FULL MODE (LiDAR devices) • Real-time mesh reconstruction with live wireframe overlay • 16-bit depth maps captured at adaptive frame rates • Scan capacity metrics: polygon count, drift tracking, session duration • Interactive 3D mesh preview with camera-sampled vertex coloring • Privacy filtering: person segmentation removes humans from meshes, face blurring in RGB exports LITE MODE (all devices) • RGB frame capture with ARKit camera poses • Server-side photogrammetry via exported image bundles • Automatic detection — no configuration needed TIME-SERIES SCANNING • Group scans by Location and re-scan the same space over time • "Extend Scan" loads a red ghost-mesh overlay of previous captures • Adjacent stitching: scan neighboring areas with shared coordinate frames • ARWorldMap relocalization for precise alignment between sessions FLEXIBLE EXPORT FORMATS • Scan4D: Full bundle with metadata, relocalization map, images, depth, and camera data • Polycam: Raw data import compatible with Polycam • RAW: Nerfstudio/COLMAP-compatible transforms.json + images + depth • OBJ / PLY / USDZ: Native mesh formats for MeshLab, Blender, and iOS Quick Look SERVER INTEGRATION • Configure any HTTP(S) upload endpoint in Settings • Direct PUT upload with live progress tracking • Save to Files or AirDrop for offline workflows • Compatible with self-hosted reconstruction pipelines DEVELOPER MODE • Front/back camera switching for testing privacy features • Synthetic IMU, camera, and depth injection for Simulator testing • Vertex mapping diagnostics and debug overlays Designed for researchers, 3D scanning professionals, and spatial computing developers who need raw, high-fidelity sensor data with full control over the reconstruction pipeline. Requires ARKit-capable device. LiDAR-equipped iPhone or iPad Pro recommended for full functionality.

Digital ROW Utilities is a professional field data collection app for documenting underground and aboveground utility infrastructure to ASCE 75-22 standards. CAPTURE UTILITY ASSETS • Point and linear feature capture with iPhone GPS • AI-powered infrastructure detection (fire hydrants, manholes, valve boxes) • LiDAR depth measurement on iPhone Pro models • Material certification scanning — photograph a cert tag and auto-fill specs via OCR • Upload cert PDFs for provenance tracking • Geotagged photo documentation ASCE 75-22 COMPLIANT • All Table 2-4 mandatory attributes included • Quality Level auto-calculated from GPS accuracy • Positional Accuracy Levels • Feature types, conveyance, cross-section, dimensions • Data certification with SHA-256 audit trails AR VISUALIZATION • View WFS utility data overlaid in augmented reality • See captured assets, imported KML files, and digitized PDF plan sheets - all layers at once • Utility-color-coded by domain (water, sewer, gas, electric, telecom) EXPORT 11 FORMATS • GeoJSON, CSV, KML, KMZ, DXF, PDF Report, and more • Material cert PDFs bundled in KMZ exports • Real coordinate projections (WGS84, Web Mercator, UTM) • AES-GCM encryption for sensitive infrastructure data FIELD WORKFLOW • Permit management with work area mapping • WFS catalog with 230+ utility data sources nationwide • Cross-app integration with Digital Traffic Control Diary • Material cert photo saved with each asset for traceability GPS & POSITIONING • iPhone GPS with auto-calculated quality levels • External GNSS & RTK support in beta testing - visit purposebuilt.systems to participate • 18 state CORS networks pre-configured including Iowa IaRTN Built by Purpose Built Systems for contractors, utility engineers, and DOT inspectors who need professional field documentation. Visit https://purposebuilt.systems for beta testing, support, and updates.