Function render_cartesian 

pub fn render_cartesian(
    field: &CartesianField,
    color_scale: &ColorScale,
    options: &RenderOptions,
) -> Result<RenderResult>

Renders a CartesianField (geographic grid) to an image with metadata.

This renders volume-derived products like composite reflectivity, echo tops, and VIL — data that is already projected onto a geographic grid.

Arguments

• field - The Cartesian field to render
• color_scale - Color scale to apply
• options - Rendering options (size, background)