CSP Particular Specification, DEVB TC(W) No. 1/2026
The Co-supervision Platform particular specification, clause by clause
The CSP Particular Specification is DEVB's specification for the site side of the Co-supervision Platform, referred to in TC(W) No. 1/2026. It sets the appliances, hardware, accuracy, testing, maintenance and security a contractor must deliver. The dashboard is provided by others (section 1.2.2). Kodifly's ScanStation and capture services meet every clause.
Last updated
- Appliance types
- Fixed-point, fixed-route and mobile LiDAR (section 3)
- Absolute accuracy
- 8 cm or better, as RMSE against at least 10 RTK checkpoints
- Coordinates and format
- HK1980 Grid, point clouds in LAS
- Tamper alert
- SMS and dashboard within 5 seconds
- Fault response
- Acknowledge within 3 hours, repair within 1 working day
- Dashboard
- Provided by others (section 1.2.2)
What the specification covers
Paragraph 14 of TC(W) No. 1/2026 says DEVB keeps sample specifications for the CSP hardware and software. Project offices write them into their contracts for the scope they select. The CSP Particular Specification is that document.
It covers the design, supply, installation, testing and commissioning, and documentation of the site equipment (section 1.1). The dashboard is provided by others (section 1.2.2). On public works that is DEVB's SmartEye. The contractor delivers data it can use and keeps the equipment running.
A contract uses one or more of three appliances (section 3): fixed-point LiDAR, fixed-route LiDAR on a small unmanned aircraft, and a handheld scanner with RTK and SLAM (Appendix A1, 3.1). Optional items are listed in section 3.4.
The requirements, clause by clause
Clause numbers are those of the CSP Particular Specification. A1 is Appendix A1 (hardware and software), A2 is Appendix A2 (general requirements).
| Requirement | Clause | Kodifly |
|---|---|---|
| Fixed-point, fixed-route and mobile appliances, alone or combined | 1.1; 3.1 to 3.3 | Meets |
| All spatial data in the HK1980 Grid; ground control points for fixed-point systems; SatRef for mobile scanning | 2.1; A2 2.1 to 2.3 | Meets |
| Point clouds in LAS (.las), plus any format the Employer specifies | 3; A1 1.2(a) | Meets |
| Absolute accuracy 8 cm or better, checked with RTK by a qualified surveyor at 10 or more checkpoints, reported as RMSE in mm | A1 1.1(f), 2.1(e), 3.1 | Meets |
| LiDAR: distance random error under 2 cm (1σ at 20 m), 240,000 points per second, 190 m at 10% reflectivity, field of view 70.4° × 77.2°, non-repetitive scan, Class 1, IP65, IMU, PTP v2 or PPS sync | A1 1.2(a) | Meets |
| Camera: global shutter, 2464 × 2056 at 24 fps, hardware trigger, encryption, face masking | A1 1.2(b) | Meets |
| Edge computer: 8-core ARM CPU, 1024-core GPU, 100 TOPS, 64 GB RAM, 1 TB SSD, IP65 | A1 1.2(c) | Meets |
| 5G router bonding four SIMs with hot failover; WiFi with WPA3 and AES; SIMs from four operators, fixed IP, 12 months or more | A1 1.2(d) to (f) | Meets |
| Lockable metal enclosure, Grade 304 stainless brackets, tamper alarm to SMS and dashboard within 5 seconds | A1 1.2(g) | Meets |
| 15,000 VA UPS with at least 1 hour of backup | A1 1.2(h) | Meets |
| Pan-tilt head: 350° pan, 70° tilt, IP65, API control from the edge computer | A1 1.2(i) | Meets |
| Fixed-route aircraft and handheld scanner to the A1 figures, including RTK positioning | A1 2.2, 3.2 to 3.3 | Meets |
| Point clouds, video and sensor data integrated into the SmartEye dashboard, with alerts | A1 1.1(d); A2 1.8 to 1.11 | Meets |
| LiDAR and camera sync under 1 ms, calibration within ±6 cm, with logging | A2 3.1 to 3.3 | Meets |
| Site acceptance tests, SAT report within 7 days, final T&C report within 2 weeks | A2 4.1 to 4.6 | Meets |
| Maintenance 08:00 to 18:00; acknowledge within 3 hours; repair within 1 working day | A2 4.7 | Meets |
| Registered electrical worker; method statement and layout approved before installation; O&M manual and as-built drawings | A2 5.1 to 5.5 | Meets |
| Security Risk Assessment and Audit, and Privacy Impact Assessment under Cap. 486; TLS for LoRaWAN links | 4.1; A2 1.6, 6.1 to 6.4 | Meets |
How Kodifly delivers to the specification
Agree and install
Submit the method statement and layout (A2 5.2), then install with a registered electrical worker (A2 5.1).
Fix control and calibrate
Survey control points in the HK1980 Grid (A2 2.2), trigger-sync the LiDAR and camera and calibrate within ±6 cm (A2 3).
Check accuracy
A qualified surveyor checks at least 10 RTK checkpoints and reports the RMSE (A1 1.1(f)).
Test and maintain
Run the site acceptance tests and report within 7 days, then maintain to the stated response times (A2 4.5 to 4.7).
CSP Particular Specification questions
What is the CSP Particular Specification?
It is DEVB's specification for the site hardware and software of the Co-supervision Platform, referred to in TC(W) No. 1/2026. It covers design, supply, installation, testing and commissioning, and documentation (section 1.1).
Who provides the dashboard?
Others (section 1.2.2). On public works this is DEVB's SmartEye. The contractor integrates the LiDAR, camera and sensor data into it (Appendix A2, 1.8 to 1.11). The SmartEye dashboard contractor stitches multiple point clouds (A1 1.1(e)).
What accuracy does the specification require?
Absolute accuracy of 8 cm or better, checked by a qualified surveyor against RTK at 10 or more checkpoints and reported as RMSE in millimetres (Appendix A1, 1.1(f)). The fixed-point LiDAR's distance random error must also be under 2 cm at 1σ (A1 1.2(a)). ScanStation's ±2 cm (1σ) range accuracy meets that.
Which coordinate system and file format apply?
All spatial data is in the HK1980 Grid (section 2.1). Point clouds are delivered in LAS (section 3).
What security and privacy work does it require?
A Security Risk Assessment and Audit against the Government IT Security Policy and Guidelines, and a Privacy Impact Assessment under Cap. 486 (Appendix A2, section 6). Cameras use face masking and encryption, and WiFi supports WPA3 and AES (A1 1.2(b) and (e)).
Must every contract include all three appliances?
No. Single or multiple appliances are allowed (section 3). The project office sets the scope, consulting DEVB's Works Policies 4 Section (TC(W) No. 1/2026, paragraph 14).
Related guides
More Co-supervision Platform guides
- DeploymentsKodifly has fitted around 20 Hong Kong public works contracts with LiDAR, cameras and edge units for the Co-supervision Platform. Departments, scope and how we deploy.
- Fixed-point vs fixed-routeTC(W) No. 1/2026 allows fixed-point LiDAR on poles or tower cranes and fixed-route LiDAR on drones or robots. When to use each, blind spots, and how Kodifly plans both.
- FunctionsThe nine Co-supervision Platform functions and four SmartEye technologies in TC(W) No. 1/2026 Annex A, the site data each needs, and how Kodifly supplies it.
- Scope and vettingTC(W) No. 1/2026 requires the Co-supervision Platform for capital works above HK$400 million tendered from 1 April 2026. Scope, vetting, exemptions and the DWSS link.
- SmartEye compatible captureWhat capture data SmartEye, DEVB's Co-supervision Platform, needs under TC(W) No. 1/2026, and how Kodifly's LiDAR, cameras, sensors and edge units deliver it.
Check your tender against the specification
Send us the CSP clauses in your tender. We will map each one to the equipment and services we deliver.