We have shown how to represent a trend report as a graph of its measures, but sometimes we want to compare two trend reports against each other, to show the differences across reporting periods or data sources.

The pair of graphs here show the selected measures and their scores for the baseline and the 5-year trend. Measures are on the inner edge of each graph, and these flow outward to the indicators, which answer the questions, which finally inform the qualities of wilderness character on the left and right.

Measure icons indicate selection status and trend score for the measure. Selected measures have solid grey circle, and brighter colors indicate an upward, stable, or downward reported trend. Unselected measures are shown as hollow grey circles.

Trend scores are summed at each level to get a positive, zero, or negative value for the parent indicator, question, or quality. Magnitude of summed trends is not considered -- two downward trends sum to a downward trend, not a 'double downward'.

The 2018 baseline report shows zero upward, two downward, and two stable scores for the four qualities on the left side of the graph. These scores sum to -2 (0 + -1 + 0 + -1 = -2), so wilderness character is decreasing based on these measures.

The 2023 trend report is incomplete, the next step is measure entry.