Cross reality system with wifi/gps based map merge

A method for rendering virtual content for extended-reality, comprising:

• identifying a canonical map;
• receiving, from a portable computing device, tracking information in a tracking map and first location metadata associated with at least a portion of the tracking map;
• determining a sub-portion of the canonical map based at least in part on a correspondence between the first location metadata associated with the at least the portion of the tracking map and second location metadata associated with the sub-portion of the canonical map;
• and
• merging the sub-portion of the canonical map with the at least the portion of the tracking map into a merged map.

A portable computing device configured for rendering virtual content for extended-reality, comprising:

• an image sensor;
• a processor coupled to the image sensor;
• a non-transitory computer readable storage medium having stored thereupon a sequence of instructions which, when executed by the processor, causes the process to perform a set of acts, the set of acts comprising:
• generating a tracking map using pose information from one or more images captured by the image sensor;
• identifying location metadata associated with a location represented in the tracking map;
• and
• localizing the tracking map to a canonical map at least by using a persistent coordinate frame in the canonical map and the location metadata associated with the location represented in the tracking map.

A computer program product comprising a non-transitory computer readable storage medium having stored thereupon a sequence of instructions which, when executed by a processor, causes the processor to perform a set of acts for rendering virtual content for extended-reality, the set of acts comprising:

• identifying, at a portable computing device, tracking information in a tracking map and first location metadata associated with at least a portion of the tracking map;
• determining a sub-portion of a canonical map based at least in part on a correspondence between the first location metadata associated with the at least the portion of the tracking map and second location metadata associated with the sub-portion of the canonical map;
• and
• merging the sub-portion of the canonical map with the at least the portion of the tracking map into a merged map.