[talk-au] Well I bought an L1/L5 Mouse GPS

[stevea]

Again, a recommendation to deal with imagery offset "smears:"  start with the "street network" (grid, whatever) first.  That "lays down the meridians" as accurately as you know with minimal effort right down to the centerlines of multiple-lane tarmac.  The small (er) stuff like buildings, those follow "later."  Otherwise, you are pretty much chasing your tail.