I just tried to export my exterior map to 1" = 5 feet at 200 dpi, and the file was over 1.8 GB in size! Note the map is currently scaled at 1" = 20 feet and its set dimensions are 54 inches by 43 inches, which means I have to rescale the map to 216 inches x 132 inches at 200 dpi to achieve proper scale.
This makes for a huge file.
The problem of course is that I need to include the idea that I'm going export at that specific scale when I create the map in the first place, so I can create manageable chunks that export easily at proper scale.
In regards to the DPI vs. PPI discussion, points to keep in mind:
1. Pixel or "picture element" is a basic element of color described on a video screen. Your screen has a set resolution that you can rescale if you have the right size monitor and proper video card. This however is measured both in pixels and dots per inch.
A pixel is square and is created using light shot through a monitor into your eyes.
A printed dot is a circle that is created from nozzles of inkjet paper or colored toner from a laser printer and is viewed by white light bouncing off the paper so your eyes can see the color (simplified explanation)
2. Most graphics software, even web graphics is not interdependant of DPI for measurement scale. Digital graphics and dpi can not be separated - not by definition of most graphics applications. They offer no "PPI" option.
I agree that a pixel and a dot are two different things, however software developers don't know the difference.
Regarding software and to help others understand how to create properly scaled map graphics for VTT use, they are treated as the same. You can't treat them as "apples and oranges" that will only confuse others.
Know then that a pixel and a dot are two different things. But if you want to 200 pixels to equal 5 feet in VTT scale, then you have to create your graphics at 1 inch equals 5 feet scale saved at 200 dpi - to get what you're looking for. That's all I'm saying.
My only question now is what is the dimensions of a standard map used for VTT use, in other words how many "feet" is shown on the monitor and how many feet are allowed off monitor that you can "scroll/move characters" within the same map?
If I knew that I could optimize my map designs for that scale and dimension in mind and create optimal VTT maps.