Shift pixel coordinates of tiles using proper affine transformation#150

Merged

weiji14 merged 6 commits intorefactor_grdtrackfrom

Jun 7, 2019

Commits on Jun 3, 2019

Commits on Jun 4, 2019

:checkered_flag: Correct shift of training tiles by half a pixel
weiji14
committed

Commits on Jun 6, 2019

:white_check_mark: Make selective_tile unit test more tacit and fix it
weiji14
committed

Commits on Jun 7, 2019

:package: Quick quilt reupload, still 2347 tiles, not much difference?
weiji14
committed