Get Layer Viz Stats

Whole-layer stats for one numeric column, for classed map styling.

breaks are the deduped ascending interior quintile boundaries (p20/p40/p60/p80); together with min/max they delimit up to five classes. Empty breaks with count 0 means the column has no non-null values. geometry_kind tells the client which classed styling applies (graduated circles for points, choropleth otherwise) — every layer carries both point and fill style layers, so the client cannot infer geometry from the style alone.

Whole-layer stats for one boolean or text column, for classed map styling.

categories is the top slice by count (descending, ties broken by value ascending); anything past the cap is summed into other_count. NULL and empty string are never categories — they are one "no value" class carried by null_count. count is the non-null population, so count - sum(categories) == other_count.