I am currently working the QGIS software and I want to extract roads of a certain region from OSM ( Open Street Maps  ) in order to create a black and white .tiff mask as follows  :

It is also preferable that the mask keeps the geoData encapsulated.

I do have 2 layers, the vector roads and the black background that is behind them. My problem is with exporting, as the background is big ( 33806 * 21462 px  ) I was not able to export the above picture with this exact desired size ( which is crucial for my project).

I do however have the vector roads in a .dxf file and a black background as .tif with the desired heigh and width, each one by itself.

I am looking for a way to merge them into one file without losing the original size. I tried using ArcGis but I am not familiar with it.

Any method would be appreciated. Thank you.

I am currently working the QGIS software and I want to extract roads of a certain region from OSM (Open Street Maps) in order to create a black and white .tiff mask as follows:

It is also preferable that the mask keeps the geoData encapsulated.

I do have 2 layers, the vector roads and the black background that is behind them. My problem is with exporting, as the background is big (33806 * 21462 px) I was not able to export the above picture with this exact desired size (which is crucial for my project).

I do however have the vector roads in a .dxf file and a black background as .tif with the desired height and width, each one by itself.

I am looking for a way to merge them into one file without losing the original size. I tried using ArcGIS but I am not familiar with it.