> Crime survey data ... surveying a cross section of people and asking them if they've been a victim of crime in the last X months, and what type of crime.

That's helpful.

Below are FBI discussions about differences and uses for National Crime Victimization Survey & Uniform Crime Reporting

https://ucr.fbi.gov/crime-in-the-u.s/2019/crime-in-the-u.s.-...

https://bjs.ojp.gov/sites/g/files/xyckuh236/files/media/docu...

A survey doesn't sound very accurate, since some people are more and less likely to be victims of crime. If drug dealers are killing each other and robbing each other, that is still X number of homicides and robberies during the year that the police investigates, while 0% of surveyed have been victims.