Table of Contents

Using panoramic cameras to collect ultra-large-scale spatial data

For super-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, single-session collection or a single large map mode is insufficient. Therefore, Mega offers a city-level ultra-large-scale spatial multi-image fusion function. Using this function can break through the original spatial usage limitations, enabling city-level VPS positioning.

It is recommended to use the multi-image fusion function when the entire continuous space cannot be fully collected within a 2-hour duration.

Note

This feature requires developers to apply through business contacts. We will unlock fusion mapping permissions based on project needs.

By default, Mega only supports fusion mapping for 5 sub-areas. To fuse larger areas, please also apply through business contacts.

route

Solutions

The standard solution for ultra-large spaces is divide and conquer. Divide the entire large scene logically into multiple physically overlapping sub-areas, collect each sub-area separately, and finally fuse and optimize all sub-areas. This enables seamless roaming through dynamic loading during runtime.

Acquisition planning

  • Divide the large scene by area, scene, or functional zones. Each sub-area should cover under 100,000 square meters.
  • Adjacent sub-areas must have at least a 200-meter completely overlapping path. The larger the overlapping area, the better the fused map. Ensure sufficient overlap to optimize the fusion of adjacent sub-maps.
  • Select texture-rich areas; avoid large areas of white walls, glass, forests, etc.
  • Ensure the collection route in overlapping paths is completely identical, including direction and specific path. Simply put, follow the previous collection route without any deviation.
  • Complete adjacent sub-area collections within similar timeframes to avoid significant lighting differences (e.g., one at noon, another at dusk), which may cause fusion failure.
  • For multi-floor indoor-outdoor scenes, divide "outdoor + ground floor" as one collection unit and "indoor multi-floor" as another. Establish spatial connections through the ground floor's public area, ultimately fusing into a unified large-scale scene map.

Acquisition requirements

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

Next steps