I'm trying to create a map which I can place points on within my application I found some mecator jpg images but in order to accurately place points I need to convert the lat/long to pixels so that the data is accurately displayed on screen. I've been following this tutorial
When trying to calculate the globe width and centre point of the map I simply took the pixel width and the center point of the pixels. i.e if the image is 100 x 100 then the globe width is 100 and the center point (50,50) although I now think this is incorrect?
How can I calculate these points? Alternatively can anyone recommend map images with this data available?