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If your map doesn't have good legibility,
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then it's not going to be as effective of map.
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What do I mean by that is that if someone can't
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identify things correctly on
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your map or it's not obvious what it is that they're looking at,
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if it's not clear, then it's not legible and then it's going to be less useful.
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For example here, I've gone with just the default labeling scheme in terms of
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the typeface and the type size for this map and it's not the worst thing ever.
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You're seeing that okay you can read it.
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It's black on a lighter background but it's not
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the most legible thing and some of them are a little close together and so on.
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If I just put a white halo around them,
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it actually increases the legibility a bit.
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I'm not a super big fan of just using these white halos,
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but it's sometimes it works well especially if for example if it's on top of say
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a satellite image but the main point I'm trying to get across here is for example,
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where we have text crossing the shoreline or some other line work like we have here,
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we've increased the legibility by using this halo.
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If I go back, see without that,
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that tax is completely lost here.
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You can't really see it because it's not distinguishable from the background.
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But if I put the halo in, suddenly it is.
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So, that's one form of legibility is you want to make sure
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that for the format of the map that you're making, the size,
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the distance that the text is readable,
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that someone can see it if they're going to be farther away,
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you want to make the text bigger.
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Those things are fairly clear.
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I hope are fairly obvious.
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Legibility can relate to symbols as well.
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If we have something like schools in the city, you can show them this way.
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And it's funny because I think now with
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the software it's great that they include these 3-D symbols.
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They're kind of fun, a little more visually interesting but when you put them
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on a map at this map scale with this size symbol,
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we have a low legibility.
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In other words, it's easy to see that we have these areas where there are overlapping on
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top of each other and you can't distinguish one school from another
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very easily and you certainly can't see the base map behind it very easily.
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So, you might say, well then why don't we just zoom in and
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then the size of the symbols hasn't
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changed but now they're spread out more because we've zoomed in.
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That's known as increasing our map scale and so that would solve the problem.
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Right. We've now made our map more legible.
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Well, yeah, we have but that's kind of cheating because we've
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changed the scale of our map and maybe we want to see more of the city,
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maybe we're not just making a map of this neighborhood.
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So, yes, that would be one way to change the legibility is to change
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the scale but that's not an ideal solution in this situation.
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So, what if we go back to the scale we had before but we just make the symbol smaller.
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Yeah, that does work. That helps quite a bit.
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We're still getting areas though where the symbols are on top of each other,
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they're kind of mashing together and so we don't really have
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a great legibility and to be honest in this situation,
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I feel like yeah, if I only had
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maybe three or four schools and it was a fairly zoomed in large-scale map,
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a symbol like that would be kind of fun and interesting but in a map like this,
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there's too many of them and it just doesn't seem to work very well.
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What if we just use a simple school symbol like this.
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That increases legibility.
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We have a less overlap, there's still a little bit here but not a lot,
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or maybe just go with some simple circles.
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Yes, they're not as interesting or fun as a 3-D schoolhouse, but you know what,
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it's actually simpler and easier for somebody to
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interpret what they're looking at and see the locations of these schools.
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Maybe they have to look at the legend to see what the red circles
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mean but it's a higher legibility.
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It's easy to look at and honestly sometimes I feel like maybe simplest is best.
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So, legibility refers to lines, patterns, shapes, colors,
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they all have to be distinct from one
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another so that people can distinguish them and if they can't,
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then you're reducing the amount of information that
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somebody can extract from your map and makes it less useful.
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Size is important.
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So, symbols have to be large enough that they can be identified and as I mentioned,
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we have to consider viewing distance.
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So, if it's a larger poster,
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you want to have larger symbols, larger text.
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If it's something that's going to be read in a book,
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that's a few inches away, you can get away with much smaller symbol, smaller text.
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So, take that into consideration for sure.7355
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