Using Panoramic Cameras to Capture Ultra-Large-Scale Spatial Data

For ultra-large scenes such as tourist attractions, urban blocks, and large commercial complexes covering areas exceeding hundreds of thousands of square meters or even millions of square meters, a single capture or a single large map mode cannot meet the requirements. To address this, Mega provides a city-scale ultra-large-scale spatial multi-map fusion feature. Using this feature can break through the original spatial usage limitations, enabling city-scale VPS positioning.

It is recommended to use the multi-map fusion feature when the entire continuous space cannot be captured within a 2-hour duration.

Note

This feature requires developers to submit a request to the business team. We will unlock the fusion mapping permissions based on project requirements.

By default, Mega only supports the fusion mapping of 5 sub-areas. If a larger range of map fusion is needed, a request must also be submitted to the business team.

route

Solution

The standard solution to the ultra-large space problem is divide and conquer, logically splitting the entire large scene into multiple sub-areas that physically overlap with each other. Each sub-area is captured separately, and finally, all sub-areas are fused and optimized. This enables seamless roaming during runtime through dynamic loading.

Capture planning

Divide the large scene by area, scene, or functional zones, with each sub-area covering no more than 100,000 square meters.
Adjacent sub-areas must have at least 200 meters of completely overlapping paths. The larger the overlapping area, the better the fused map. Ensure sufficient overlapping areas to optimize the fusion of adjacent sub-maps.
Choose areas with rich textures, avoiding large areas of white walls, glass, forests, etc.
Ensure that the capture route in the overlapping paths is completely consistent, including the direction and specific route. Simply put, follow the previous capture route without any deviation.
Try to complete the capture of adjacent sub-areas within similar timeframes to avoid scenarios like one being captured at noon and another at dusk (lighting differences may cause fusion failure).
For multi-floor indoor and outdoor scenes, it is recommended to divide "outdoor + first floor indoor" into one capture unit and "entire indoor floors" into another capture unit. The two units establish spatial connections through the common areas on the first floor, ultimately fusing into a unified ultra-large scene map.

Capture requirements

Use the GoPro Max panoramic camera for ultra-large space capture to ensure data quality and stitching efficiency.

Each sub-area requires separate capture route planning.
Configure GoPro Max settings.
Follow the single-map capture requirements during capture.
Refer to the checklist to verify compliance with capture requirements before and during the capture process.

Next steps