The document discusses opportunity mapping conducted by the Kirwan Institute to analyze how low-income and racial/ethnic groups are situated within states and metropolitan regions. Opportunity maps can illuminate neighborhoods at risk of low opportunity, where affordable housing is needed in high opportunity areas, and conditions impacting children's development. The analysis examines indicators like education, economic opportunity, mobility, health, and neighborhood quality. Subsidized housing in regions like Baltimore is often clustered in predominantly African American, low opportunity areas. The remedy proposed following litigation must provide desegregative housing units in high opportunity areas and be regional in scope.