Garmin recently released a very buggy new firmware for edge 1040, 840 and 540. There are two huge problems with this new firmware (21.x) concerning map rendering. All maps published June 02 or later are therefore adapted.
a) Layout in the maps is defined via a .typ file. In this typfile there are two ways to define how streets should render. One is by setting two colours, one for the line and one for the border. And the other is by using two colours and creating a simple bitmap (32x32px). Likely to increase contrast or whatever Garmin decided to render the border in 4x the width that is defined in the .typfile. This doesn’t affect most of their modern maps as they only used a line color without border – but in many older maps Garmin also uses a border colour. Now it sounds like the obvious solution to just switch to bitmap instead of line/border – but the problem is that most garmin devices render bitmap lines different and it looks worse. As I believe that about half of my users use the openmtbmap/velomaps with Garmin edge devices I decided to remove the borders and render most streets […]
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