County boundaries: Kenya counties map data (@svg-maps/kenya, CC BY 4.0), traced from official administrative boundaries. Mombasa and Lamu are shaded by positivity; the other 45 counties are shown only for national context and are not part of this study. The Indian Ocean shading is rendered directly from these same county shapes, so it follows the true coastline; Lake Victoria and Lake Turkana aren’t part of the boundary dataset, so they’re marked as approximate reference points for orientation, not traced shorelines.