Pdf images work best when zoomed up to 400% or more
At normal magnification Pdf images do not look as expected
To see the fine detail of some of the network maps it is necessary to access a zoomable vector file. This is because some images such as the Tennis Universe are simply too large with too much detail to fit on the screen. Therefore to see the detail such as match results it is necessary to zoom in on a smaller portion of the image.
There are a number of formats which support zooming in like this, but the WordPress system which this site is built on only supports one of them and that is pdf. (Which is a shame because we have vector SVG images for all our files which reproduce perfectly at all magnifications. If you are interested in this work then contact me for direct supply of SVG files)
Pdf images work perfectly for images which do not include fine lines or a great deal of intricacy. This is because where pdf finds a very fine line it likes to thicken that line (I presume in the interests of clarity). There is a setting under preferences within the adobe acrobat pdf reader software which allows you to turn off thickening of thin lines. Setting this box will help, but actually the lines are still thickened, just by a lesser amount.
The effect of this on our images such as the Tennis Universe is to smother it in white lines when it is initially displayed without zooming.
There is no need to be discouraged by this effect. As you start to zoom in then the lines start to become thicker and the pdf view tends towards the expected view