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Take spherical photo stack by DJI Spark (46 single photos)l
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Download the photos.
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Use Microsoft Image Composite Editor (ICE) to stitch the photos into one photo, save it as jpg file.
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Use Photoshop or other tool to make the photo 2:1. 360 deg photo can’t be generated if the ratio is not 2:1. A nice video tutorial
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View it in RICOH THETA viewer to make sure everything is right.
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Modify the projection type of the photo using exiftool. Without this step, the photo will be shown as a flat image in online platforms.
"exiftool(-k).exe" -ProjectionType="equirectangular" photo.jpg -
Upload it to Facebook or google street view. An example