I am referring to this http://www.apcircuits.com/Portals/0/Assets/Downloads/the_gerber_file_format_specification.pdf?ver=2015-06-13-175030-363

But it is not entirely helpful.

I get these lines Y-508000D1* X-2286000Y-762000D2* - they are moveto and lineto with x and/or y coordinates.

But what are the units of the coordinates? It doesn't look like mm.

I get this bit %TA.AperFunction,ComponentPad*% %ADD15C,2.3*% - it is defining the diameter of my pads and giving it the ID of '15'

I sort of get this bit %TF.FileFunction,Copper,L2,Bot*% %TF.Part,Single*% - it is telling me singled sided copper clad. But what is 'L2'? and 'Bot'?

But I don't understand what this is telling me about the board: %TA.AperFunction,Conductor*% %ADD14C,2.0*%

Code:`%TF.GenerationSoftware,Novarm,DipTrace,3.2.0.1*%`

%TF.CreationDate,2018-11-07T12:25:27+09:00*%

%FSLAX35Y35*%

%MOMM*%

%TF.FileFunction,Copper,L2,Bot*%

%TF.Part,Single*%

%TA.AperFunction,Conductor*%

%ADD14C,2.0*%

%TA.AperFunction,ComponentPad*%

%ADD15C,2.3*%

G75*

G01*

%LPD*%

X-2794000Y-254000D2*

D14*

Y-508000D1*

X-2286000Y-762000D2*

X-2540000D1*

X-2794000D1*

Y-508000D1*

Y-254000D2*

Y508000D1*

X-2286000Y-762000D2*

X-762000D1*

Y-747873D1*

Y-508000D1*

Y508000D2*

X-254000D1*

Y-762000D1*

X1016000D1*

X1524000D1*

Y508000D1*

X1016000D1*

X-762000Y-747873D2*

X-254000Y-762000D1*

X1016000Y-508000D2*

Y-762000D1*

X1524000Y1016000D2*

Y508000D1*

X-2032000Y-254000D2*

Y-508000D1*

Y-254000D2*

Y762000D1*

Y1016000D1*

X-2794000D1*

X-1524000Y762000D2*

X-2032000D1*

X0D2*

Y1016000D1*

X-2032000D1*

X1016000D2*

X0D1*

X-2286000Y-2286000D2*

X-3302000D1*

Y762000D1*

X-2032000D1*

X-2286000Y-2286000D2*

X-2032000D1*

X0Y254000D2*

Y762000D1*

X-1270000D2*

Y254000D1*

X-762000D1*

X508000Y762000D2*

Y254000D1*

X1016000D1*

X0Y0D2*

Y-254000D1*

X1016000D2*

Y0D1*

X762000D2*

X1016000D1*

X-762000Y-254000D2*

Y0D1*

X-508000D2*

X-762000D1*

X254000D2*

Y-254000D1*

X-2286000Y-1778000D2*

X-2032000D1*

X762000Y-1270000D2*

Y-1778000D1*

Y-1270000D2*

X-2286000D1*

Y-1778000D1*

X-1524000D2*

Y-2032000D1*

Y-2286000D1*

X-2286000Y-2032000D2*

X-1524000D1*

X-2286000D2*

X-2794000D1*

Y-762000D1*

X-1524000Y-2286000D2*

Y-2540000D1*

X-508000D1*

X508000Y-1778000D2*

Y-1524000D1*

X-1524000D1*

Y-1778000D1*

X-508000Y-2032000D2*

X0D1*

Y-1778000D1*

X1016000Y-1270000D2*

Y-1778000D1*

X0Y-2540000D2*

Y-2286000D1*

X-1016000D1*

X254000Y-2540000D2*

Y-1778000D1*

D15*

X-2794000Y-508000D3*

Y-254000D3*

X-2286000Y-2286000D3*

X-2032000Y-1778000D3*

X762000Y0D3*

X254000D3*

X-2032000Y-508000D3*

Y-254000D3*

X-2286000Y-762000D3*

X-2540000D3*

X-1270000Y762000D3*

X-1524000D3*

X1016000Y-254000D3*

Y-508000D3*

X-762000Y0D3*

Y508000D3*

X1016000D3*

Y254000D3*

X-2794000Y1016000D3*

X-762000Y254000D3*

X-2794000Y508000D3*

X1016000Y0D3*

X0Y-254000D3*

X254000D3*

X-762000Y-508000D3*

Y-254000D3*

X0Y762000D3*

X508000D3*

X0Y0D3*

X-2286000Y-2032000D3*

X-1524000Y-1778000D3*

X-2032000Y-2286000D3*

X-508000Y0D3*

X-2286000Y-1778000D3*

X1016000Y1016000D3*

X1524000D3*

X-1524000Y-2286000D3*

X0Y254000D3*

X508000D3*

X-254000Y-1778000D3*

X0D3*

X762000Y-1270000D3*

X1016000D3*

X-508000Y-2032000D3*

X254000Y-1778000D3*

X508000D3*

X1016000D3*

X762000D3*

X-508000Y-2540000D3*

X-1016000Y-2286000D3*

X0Y-2540000D3*

X254000D3*

M02*