Exporting statistics - PIX4Dfields

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This article explains how to export statistics from PIX4Dfields in .csv file format.

Exporting statistics

PIX4Dfields allows for annotation and raster layer statistics to be exported in a .CSV (comma separated values) format.

Process:
  • Click Export.
  • On the Export Menu, click Vector.png Statistics.
  • Select the LayerIcon.png Layer/s  where annotations are, choose decimal separator (comma or point).
  • Click Export, choose Folder.png Folder of destination.

Export3.png

Export button.

Two files will be exported:

  •  Vector.png annotation-statistics: Calculates the zonal statistics within the annotation.
  •  Vector.png layer-statistics: Calculates basic statistics of the entire raster layer.
 
Information: When setting a custom minimum and maximum value in the histogram, the following is exported:
  • The statistics of the whole layer or the annotation area.
  • The statistics of the visible values set with the histogram.
 
Important:  When viewing the histogram, the "visible" statistics will be all the pixels with values between the min/max sliders.

Annotation-statistics.csv

This file contains statistics about each annotation or plot. 

PlotsSatistics.png

Annotation's statistics exported.

  • Mean index value: Refers to the average value of the pixels inside every specific plot that has been calculated using the bands of the corresponding vegetation index. 
  • Index value SD: Refers to the Standard Deviation (SD), which describes how spread out the dataset is. It is a measure of the amount of variation or dispersion of the plot. A low SD indicates that the values tend to be close to the mean of the dataset, while a high SD indicates that the values are spread out over a wider range.
  • Mean index value (visible): Refers to the average of the pixels inside each plot within the range selected in the histogram.
  • Index value (visible) SD: Refers to the SD of data within the range selected in the histogram.
  • Area: Refers to the surface covered by the plot and it does not take into account changes on the histogram range.

Layer-statistics.csv

This file contains statistics about the selected layers. The example below describes an NDRE index and Digital Surface Model.


Layers_Statistics.png

  • Area: Refers to the surface covered by the layer.
  • Area (visible): Refers to the surface only covered by the pixels within the range selected in the histogram.
  • Min-Max: Refers to the minimum and maximum values present on each layer.
  • Min - Max (Visible): Refers to the minimum and maximum values within the range selected in the histogram for each layer.
  • Mean index value: Refers to the average value of all pixels in the layer, that has been calculated using the bands of the corresponding vegetation index. 
  • Index value SD: Refers to the SD of data present in the whole layer.
  • Mean Height: Refers to the average height present in the layer, it will be present if Digital Surface Model (DSM) was selected when exporting.
  • Height SD: Refers to de SD of the DSM.
  • Mean index value (visible): Refers to the average value of all pixels within the range selected in the histogram.
  • Index value SD (visible): Refers to the SD of data within the range selected in the histogram.
  • Mean height (visible): Refers to the average height value of all pixels within the range selected in the histogram.
  • Height (visible) SD: Refers to the SD of height data within the range selected in the histogram.

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