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Comment corriger les données manquantes sur l'eau

BrianBulla

Voir l'image ci-dessous. Il s'agit d'un vol au-dessus de quelques lagunes que je n'ai terminé qu'à moitié, mais la partie que j'ai terminée n'est pas très réussie. Y a-t-il une méthode recommandée pour voler lorsqu'il y a beaucoup d'eau ? Il semble que les tuiles ne puissent pas être assemblées et donc des données manquent.<\/P>

Devrais-je peut-être faire cela à une altitude plus élevée (je pensais être déjà haut) ? Ou peut-être plus bas ?? Moins de chevauchement ou plus ??<\/P>

Tout aide est appréciée.<\/P>

<\/span><\/P> <\/P> <\/P>

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Accepted answers

Andrew-Bowne

Try flying higher if you can, a little slower, and more overlap. You could also try flying on an overcast day. Reflection off of water can cause the issues you are seeing.

All comments

Andrew-Bowne

Try flying higher if you can, a little slower, and more overlap. You could also try flying on an overcast day. Reflection off of water can cause the issues you are seeing.

BrianBulla

Hi,

Yes, flying higher seems to fix this issue. Thanks!

NicoBonnafoux

@BrianBulla in addition to Andrew's suggestion, give the Reality Engine beta a try, it handles water and reflective surface better, with further improvements coming soon.
In the future, we'll also add the "Water Body Correction Feature" available in the desktop ArcGIS Reality products, which flattens water areas and helps avoid gaps.

BrianBulla

Hi @NicoBonnafoux . I just reprocessed the above using the Reality Engine, but I would say things did not improve.

Is there a particular setting I need to adjust in Site Scan??

NicoBonnafoux

If that's the case, I suspect the issue is with your source images.

Could you share a screenshot with the image locations displayed, and perhaps a few of the images?

Based on your previous note stating that flying higher helped improve the results, I suspect this capture was flown lower and has many images showing only water.

BrianBulla

Hi,

Here are the photos. I still need to go back to this site as I need to finish it completely, fly it higher, and on a cloudy day. These are the lower, sunny day images.

NicoBonnafoux

Flying higher will definitely help here to ensure you don't have images showing only water which leads to a lack of tie points between images.
It also seems your overlap isn't consistent, I suggest making sure you're using a high-end SD card with a fast write speed (U3/V30 class or better).

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