Wentzville also provides a detailed map of the taxing districts within its borders on a city website. Nonetheless, a handful of those districts are listed as noncompliant by the state.

In all, 293 of 712 municipalities haven’t sent in their information. Only 64 of the state’s 114 counties have complied. And, just 68 of 206 transportation districts have sent in their border information.

Moy said some taxing bodies say they don’t have digital mapping equipment.

“A majority of the responses have been that they do not have GIS capabilities and would have to hire it out,” Moy said.

And, she added, the law doesn’t impose any penalties for municipalities that don’t comply.

Once completed, the online map could help raise awareness of rising sales tax rates, which Christofanelli is targeting in separate legislation.

He had sought to impose a sales tax cap, but is now seeking legislation that seeks to better inform voters about sales tax rates when they go to the polls for tax hike referendums.