Alignment tips or tools?

I’m trying to modify an airport with updates that are in the latest Bing maps version but are not in the version being delivered to the sim. The airport had major changes to parking and parking taxiways.

Is there a way to either import the updated imagery into the designer or are there measurement and alignment tools? The best I’ve been able to do is use an apron with concrete tiles to help with alignment.

I just sort of rolled my own by creating other objects, like a painted line, that I could then move and use as an alignment tool.

Although I feel like I’m missing something obvious, like there has to be a ruler/angle tool in the SDK somewhere?