Map Colors

Normal Vision
with NO filtering









Deuteranopic View
(A form of red-green color vision deficiency)
of the first picture above










Hi Everyone,

I was going into Manhattan the other day and needed to find out what the schedule was
for the LIRR (that's the LongGisland Rail Road)

I came across the first map above realized this was a GREAT! example of how NOT
to use color in a map. They broke so many rules, I can't even start to list them.
Of course the person who designed it must surely think they did a great job.

The first picture has NO filtering, so a person with "normal" vision should see
about six or seven different colors.

The different lines running East-West are color-code in so many colors, I got a headache
looking at it. Thankfully I knew which line I wanted (and I am NOT color vision deficient)

A color vision deficient (CVD) person with "deuteranopia", the main form of
red-green deficiency would see the map as in the second picture I attached
which has a special filter to simulate red-green CVD.

I'm not sure if a CVD person who didn't know where they were going could
figure this out. I am VERY glad I don't have to deal with this!

Sal