there are a few examples on this site, like the maps of Africa and USA below. Also one map here and here
Also note that in the first days of digital image analysis, raster images where printed with ascii caracters (one caracter per value). This was not really "art", but it was the only way to visualise (on screen or on paper) a raster when screens and printer were monochrome.
___________
/ | | |
,' ,' \/',_ __
,'__/ | ',| "'-,,,,,,,
,/ _|', | | \
| | |', \ | \
|__| | ', ', | \
/ | ', ,_"""""---'-_,'______\
/ | ',,_-'" | | ',
|_________| | / | / ',,'""""|
|__ | ,____/ | _| / |___ /
'\___| ,'_,'|_,-,_______| | / , '/
\,' _', _/ ,, ,',| | \ | '" ,'
\ / |_ , | \|||| ,' | ,'| _"" |,'
' ,' ', | ||||| __ ,' _|_ ,' | |""---/
' ,"""','"""""" | / \"""| /
|_____|_ __''" \ |
| | / """""" | \ /
\ / | | /
\--' | /
| \__ _|__ |
| |__ | ',,,|
| |____| / |
/ _| ,,'_ |
|__________|___,' ,,' /
\ ---' \,/ ,'
\ | ,,,' \_/
| |_,'' |/
| | []_|
\___' /
\ __,'
\_____/ FoulWing
,__ _,
\~\| ~~---___ , | \
| Wash./ | ~~~~~~~|~~~~~| ~~---, VT_/,ME>
/~-_--__| | Montana |N Dak\ Minn/ ~\~~/Mich. /~| ||,'
|Oregon / \ |------| { WI / /~) __-NY',|_\,NH
/ |Ida.|~~~~~~~~|S Dak.\ \ | | '~\ |_____,|~,-'Mass.
|~~--__ | | Wyoming|____ |~~~~~|--| |__ /_-'Penn.{,~Conn (RI)
| | ~~~|~~| | ~~\ Iowa/ `-' |`~ |~_____{/NJ
| | | '---------, Nebr.\----| IL|IN|OH,' ~/~\,|`MD (DE)
', \ Nev.|Utah| Colo. |~~~~~~~| \ | ,'~~\WV/ VA |
|Cal\ | | | Kansas| MO \_-~ KY /`~___--\
', \ ,-----|-------+-------'_____/__----~~/N Car./
'_ '\| | |~~~|Okla.| | Tenn._/-,~~-,/
\ |Ariz.| New | |_ |Ark./~~|~~\ \,/S Car.
~~~-' | Mex. | `~~~\___|MS |AL | GA /
'-,_ | _____| | / | ,-'---~\
`~'~ \ Texas |LA`--,~~~~-~~,FL\
\/~\ /~~~`---` | \
\ / \ |
\ | '\'
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