Black Holes. Don't let the name fool you: a black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City.
Determine Census Tract Codes Based on Address. â¢ Key in an address here to find codes/names based on address. Census tracts within a county are identified by a 4-digit basic code between 0001 and 9999, and may have a 2-digit suffix ranging from .01 to .98; for example, 6059.02. The decimal point separating the 4-digit basic tract code from the 2-digit suffix is shown in U.S. Census Bureau printed reports and maps.
County-District-School (CDS) Codes. The California Department of Education (CDE) is required to report Directory information annually to the U.S. Department of Education (ED) through the EDFacts Submission System (ESS). To meet this federal requirement, the CDE uses the County-District-Code (CDS) code system.