![]() In fact, my recent work with trying to build accessible basemaps has proved that if anything it is coming back. But despite that the halo is not going away. These days resolution has improved to the point where an online image is as clear (if not more so) than a printed image. In the early days the screen resolution made the halo an essential part of achieving any sort of clarity. They work in RGB, and they are dynamic, which doesn’t lend itself to this type of solution. We could block out road casings for example, but leave the background colors intact.īut online maps are different. Eventually we had software that could block background symbols, selectively – what we called ‘variable depth of mask’. On computers we developed sophisticated tricks involving overprint settings and 1% color values (They worked really well, but they confused and irritated our printers!). In the manual cartography days that meant painting the lines back from labels on a film negative. ![]() It goes back to my days as a print cartographer, when we did all that we could to break lines and symbols around labels without affecting the background. ![]() I’ve got a visceral aversion to those blocky white ‘halos’ around labels that used to be such a part of the look of an online map. ![]()
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