how to calculate the canopy coverage and the height, and Trees Count

Agriculture
1

For example, in a field, same tree, different lots,
coverage 2 coverage 1

How can I calculate the canopy coverage of the whole land?
This will definely connect to the final fruit volume.

And if I can add the height of the trees, it will be have area x height, for forecast the ton of fruit

2

We have hundreds acres. We need to know where the tree missing(die), how many, and where, marked it out. And how many trees are great, how many trees are good, how many trees are weak.

coverage 3.PNG
coverage 3.PNG1173×838 533 KB

All these questions are for all orchards. They all need this function. I know some company can do that. But they only do that for their own service, not provide software.

3

That is an interesting and complex task. Which could not be solved completely with fields / mapper alone right now. I will share some thoughts on how you could approach the problem with QGIS.

  1. Approach for Canopy area calculation
  • Calculate a biomass/ canopy sensitive index like NDVI in fields
  • Acquire accurate field boundary (by digitizing them from the ortho mosaic)
  • Export your index layer and boundary to QGIS
  • You need to find a threshold value for where NDVI = soil and NDVI = canopy, that could be done in fields with the advanced layer visualization tool
  • With this threshold value and the raster tools in QGIS you could create a binary map with soil and canopy values
  • now trim/mask the result with your field boundary and you could calculate the percentage of canopy on that field
  1. Tree Heights
  • For tree height data you have to use pix4d mapper
  • You could combine the results in QGIS with your canopy analysis to achieve what you want
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4

Hi all,

In case you are following this approach, remember to use your the .data.tif files these files contain the true image data from the multispectral bands available.

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