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水上の欠損データを修正する方法

BrianBulla

以下の画像をご覧ください。これはいくつかのラグーン上空でのフライトですが、途中までしか完了しておらず、完了した部分もあまり良くありませんでした。水域が多い場合に推奨される飛行方法はありますか？タイルをうまくつなぎ合わせられず、データが欠落しているようです。<\/P>

もしかすると、もっと高い高度から飛行すべきでしょうか（最初から高いと思っていました）？それとも低く？重なりは少なくするべきか、多くするべきか？<\/P>

どんな助言でも感謝します。<\/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.

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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).

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

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 @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

@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,

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

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.

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