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How to analyse the statistical significance of the trends

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mitchnuh
New Contributor

Good day,

I have used multidimensional temperature data (1980-2019) and the Generate Trend Raster tool to create a trend map below.

mitchnuh_1-1719457894367.png

Is there anyway I can measure the statistical significance of the trends. What available tools can I use in ArcGIS Pro?

Many thanks

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kinopmi
New Contributor

If the upward trend in X is real, then in general, you would expect X(t+τ) > X(t), where τ is some lag. This is the relationship you want to test. You could count how many pairs X(t+τ), X(t) satisfy this relationship vs. how many don't https://routerlogin.uno/  .

DanPatterson
MVP Esteemed Contributor

Generate Trend Raster (Image Analyst)—ArcGIS Pro | Documentation

Did you see the possible tests you can use in the help topic?

If the tool is used to perform either the Mann-Kendall or Seasonal-Kendall test, the output is a five-band raster as follows:

Band 1 = Sen's slope
Band 2 = p-value
Band 3 = Mann-Kendall score (S)
Band 4 = S Variance
Band 5 = Z-score


... sort of retired...