FAQ: How do I request access to use the UDS Mapper? January 23, 2020 20:40 Updated When you go to www.udsmapper.org you will see the Register Now link on the right side of the screen. Click the button to access the registration form. Related articles FAQ: When I zoom out enough to show my entire service area, the selected ZCTAs disappear. Therefore, I’m not able to fit my entire service area onto one map. Is there anything I can do?