If you already have images and poses, you need to partition your data to different scale and record where you split it. E.g. in our Google earth datasets, the camera gradually moves far away. So in pose_enu.json, the entry "scale_split": [325, 195, 65, 0] means: stage0(furthest scale) ranges from image index 325 until the end; stage1(a closer scale) ranges from image index 195 until 325 etc.
If you already have images and poses, you need to partition your data to different scale and record where you split it. E.g. in our Google earth datasets, the camera gradually moves far away. So in pose_enu.json, the entry "scale_split": [325, 195, 65, 0] means: stage0(furthest scale) ranges from image index 325 until the end; stage1(a closer scale) ranges from image index 195 until 325 etc.