Following up on last month’s Supreme Court decision highlighting the segregation effects of Texas’s low-income housing programs, Chronicle reporter Jayme Fraser has a few observations about how the Housing Tax Credit program has been administered around here — after studying the above map, which she assembled to show the location and details of every Houston-area property involved in the program from its start in 1987 through 2013. Using federal funds, the Texas Dept. of Housing and Community Affairs offers tax incentives to private apartment developers in exchange for guarantees to keep rents on new or rehabbed complexes below the market rate.