Mapmost

Public Security Video Viewshed Twin Management Platform

The Public Security Video Viewshed Twin Management Platform integrates video surveillance resources and uses GIS, a viewshed computing engine and 3D mapping technology — built on Mapmost — to achieve comprehensive management and visualized display of monitoring devices. Video corresponds one-to-one with geographic scenes, and monitoring visible areas and blind spots are shown on a single screen, greatly improving the convenience of retrieving feeds and helping personnel quickly and comprehensively grasp the monitoring layout.

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Platform Construction Results

Video Viewshed: One Device, One Archive, One Library

Based on 3D mapping, cameras' target positions and directions are converted into 3D space in real time with precision, providing real-world viewshed and blind-spot analysis. Oblique models faithfully restore the real scene, placing devices on the real map for one-screen overview of monitored areas, blind spots and overlaps — forming one monitoring device + one information archive + one viewshed geographic library per camera.

Viewshed from Macro to Micro, All in Hand

- Macro: full-area video mapping with overall viewshed coverage at a glance.
- Meso: key areas and roads — device position, orientation, viewshed and blind spots clear at a glance.
- Micro: 3D digital twin technology finely depicts each device's geographic coverage, position and angle.

Platform Construction Approach

Monitoring Viewshed: One Device, One Archive, One Library

Based on 3D mapping, cameras' target positions and directions are converted into 3D space in real time with precision, providing real-world viewshed and blind-spot analysis. Oblique models faithfully restore the real scene, placing devices on the real map for one-screen overview of monitored areas, blind spots and overlaps — forming the “one device, one archive, one library” viewshed asset ledger.

Reverse Viewshed Retrieval

GIS integrates camera positions with geographic data, establishing viewshed relationships for each camera. On the map, video surveillance that can see a given location is found by spatial position.

One-click Video Plans

Users select multiple monitors per business scenario to build video plans, supporting creation, editing, deletion and one-click display by theme. For example, selecting 10 monitors along an expressway builds an “xx expressway security” plan with one-click opening, or selecting 5 monitors around “xx square” builds an “xx square” plan.

Device Blind-spot Simulation

Based on simulation of camera imaging principles, device poses and visible ranges are modeled — so installation effects are known in advance, greatly reducing manual debugging costs.

Point Correction & Governance

Through 2D mapping between camera viewsheds and spatial information, camera positions across the domain are corrected — automatically computing precise positions (longitude/latitude) and re-displaying them correctly on the map.

Grid Mapping

Monitoring viewsheds and frames are divided into grids; algorithms map grid correspondence — the mapping between surveillance frames and the geographic world — supporting crowd density calculation and trajectory prediction.

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