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 helps contractors, utility engineers, and inspectors document underground and aboveground utility infrastructure in the field. CAPTURE AND DOCUMENT • Capture point and linear features with location measurements and recorded uncertainty. • Attach field photographs, asset attributes, material certificates, and inspection notes. • Measure visible surfaces and trench geometry with LiDAR on supported devices. • Review on-device infrastructure detection candidates before adding them to your project. MAPS AND REFERENCE DATA • Browse public WFS and ArcGIS reference sources. • Import KML overlays, PDF plan sheets, and georeferenced imagery. • View captured assets and reference overlays in augmented reality. • Review extracted plan-sheet symbols, lines, and tabulations before accepting them. REVIEW AND DELIVER • Record ASCE 75-22-oriented utility attributes and positional accuracy information. • Review data completeness, provenance, and quality-level justification. • Capture collector, reviewer, and professional signature records for your review workflow. • Export GIS and civil-design formats, PDF reports, and deliverable packages with file hashes. • Publish to your own configured ArcGIS destination using your credentials. LOCAL FIELD WORKFLOW • Organize projects, permits, photos, and scans on your device. • Undo edits and recover a previous session snapshot when possible. • Exchange session bundles with another device through a user-selected sharing method. • Prepare permit packets and follow the selected agency's filing instructions. Phone positioning retains the device's measured accuracy. A correction-stream connection alone does not improve phone accuracy or establish an RTK fix. LiDAR and AR availability depend on device hardware. Utility investigation quality and professional compliance require appropriate evidence and review; the app does not certify them automatically from GPS precision. Cloud account synchronization and external accessory GNSS connectivity are not enabled in this release. Permit packet preparation does not constitute agency acceptance or an 811 ticket. Built by Purpose Built Systems for field utility documentation.