# How Many Images per Sequence?

**URL:** <https://forum.mapillary.com/t/how-many-images-per-sequence/9466>\
**Category:** Imagery\
**Created:** [April 19, 2025, 4:23pm UTC](https://forum.mapillary.com/t/how-many-images-per-sequence/9466 "2025-04-19T16:23:53Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![GITNE](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.mapillary.com/gitne/32/70659_2.png) [@GITNE](https://forum.mapillary.com/u/GITNE)\
**Post date:** [June 23, 2025, 11:49am UTC](https://forum.mapillary.com/t/how-many-images-per-sequence/9466/11 "2025-06-23T11:49:38Z")

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@paulinus @balys I have a few more questions about the correlation between images per sequence, space density, and Mapillary reconstruction accuracy.

- Do you favor image resolution or camera position density (number of image per unit of volume), or both? @boris has suggested that Mapillary [targets ⅓ images per meter with videos](https://forum.mapillary.com/t/questions-about-best-practices-to-capture-for-map-data-creation-signs-and-points/9658/5), which seems to me rather a bit sparse for high density maps. Does then going denser than ⅓ images per meter mean a waste of effort? Bee Maps goes for 30 fps in their capturing devices (for cars), which equates to denser coverage per meter when capturing by car at urban speeds. I am though aware that Bee Maps may not be using every frame for reconstruction either.
- Is there a minimum space density resolution (camera positions per unit of volume) in Mapillary’s reconstruction?
- Some of my sequences fail due to not reconstructing and I do not know why:

```auto
9bO4gcxKUn7GHIDRAQ0Mtm
a6OP2L8gFd0TXIYVQyjEhD
wo8HOv2YmbLVuRl4WngDe7
GbzQ908mheDJPL76cIXstF
btm3hiTFOWzqdyunCK7aBG

```

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