Use a panoramic camera to acquire ultra-large-scale spatial data

For ultra-large scenes such as tourist attractions, city blocks, and large commercial complexes with areas exceeding hundreds of thousands of square meters or even millions of square meters, a single acquisition and single large-map mode cannot meet the requirements. For this reason, Mega provides city-scale ultra-large spatial multi-map fusion. With this feature, you can break through the original spatial usage limits and implement city-scale VPS localization.

If the entire continuous space cannot be acquired within 2 hours, it is recommended to use the multi-map fusion feature.

Note

This feature requires developers to apply to business. We will unlock fusion mapping permission according to project requirements.

By default, Mega only supports fusion mapping of 5 subareas. If you need to fuse a larger map range, you also need to apply to business.

route

Solution

The standard solution for ultra-large spaces is to divide the whole into parts. Logically split the entire large scene into multiple physically overlapping subareas, acquire each subarea separately, and finally fuse and optimize all subareas. This enables seamless roaming at runtime through dynamic loading.

Acquisition planning

Divide the large scene by area, scene, or functional region. The area of each region should be within 100,000 square meters.
Adjacent subareas need at least 200 meters of fully overlapping paths. The larger the overlap, the better the fused map. Ensure there is enough overlap to fuse and optimize adjacent submaps.
Select areas with rich texture. Do not choose scenes such as large white walls, glass, or woods.
Ensure that the acquisition route on the overlapping path is exactly the same, including travel direction and the specific route. Simply put, walk along the previous acquisition route without any deviation.
Try to complete acquisition of adjacent subareas during similar time periods. Avoid acquiring one at noon and another at dusk, because lighting differences may cause fusion failure.
For multi-floor indoor and outdoor scenes, it is recommended to divide "outdoor + indoor first floor" into one acquisition unit and "overall indoor floors" into another acquisition unit. The two establish a spatial connection through the common area on the indoor first floor and are finally fused into a unified ultra-large scene map.

Acquisition requirements

Use a GoPro Max/Max2 panoramic camera for ultra-large space acquisition to ensure data quality and stitching efficiency.

Each subarea's data needs its own planned acquisition route
Configure GoPro Max or GoPro Max2
Follow single-map acquisition requirements during acquisition
Use the checklist to check whether the acquisition requirements are met before and during acquisition

Next steps