30-Day Map Challenge – December 18, 2019 at 09:22AM

Announcing #30DayMapChallenge in November 2019! Create a map each day of the month with the following themes 🌍🌎🌏

No restriction on tools. All maps should be created by you. Doing less than 30 maps is fine. #gischat #geography #cartography #dataviz pic.twitter.com/6Go4VFWcJB

— Topi Tjukanov (@tjukanov) October 25, 2019

I did not take the time to participate but was amazed at the people who did, many of them every day-and some of the results are pretty fantastic.  I will highlight some of the ones I liked (mostly showing the tweets) though I did not see everything that came along.
For example, here is Lego Oaxaca.

Día 28: Divertido / #Yïkxekp

Un mapa de las #naciones de #Oaxaca en estilo #Lego#30daymapchallenge pic.twitter.com/atCYy1lWrQ

— Colmix (@Colmixe) November 29, 2019

Mangroves vs Hurricanes

#30DayMapChallenge Day 25: Climate – Mangroves vs Hurricanes
Mangroves have the ability to lessen the impact of flooding caused by hurricanes (reducing storm surges by 26-76%) BUT they are in an annual decline globally. pic.twitter.com/zH2nsElrFS

— Christopher Pollard (@CRVanPollard) November 25, 2019

European Hydrology

#30DayMapChallenge nr 26 (hydrology): Where each drop of rain in Europe (EU, actually) flows to pic.twitter.com/8iJ9krRRtE

— Maarten Lambrechts (@maartenzam) November 26, 2019

More from Maarten Lambrechts here.

Here is elevation data from the Philippines from Carl Churchill-his other work can be seen on his Flickr album.

New York CityBike data as animated hexagons-press play.

#30DayMapChallenge Day 4: Hexagons

Citibike trip data binned into hex pillars by finish position and pivoted into hourly blocks by stop time for New York.

Data via: https://t.co/OFuEtfnixP#map #3d #dataviz #nyc pic.twitter.com/tAnVDy1s5r

— Craig Taylor (@CraigTaylorGIS) November 4, 2019

Commuter Rail in the Northeasten USA

My submission for #30DayMapChallenge day 2 – lines:
Commuter rail (not Amtrak) in northeastern US. Some data was hard to find (esp @MTA). I’ve taken these lines from Wilmington DE to New Haven CT. Shows how challenging #railroad is in US. #Map produced in #QGIS 3.8. pic.twitter.com/HKgzCUYRr8

— Philip Pierdomenico (@PhilPierdo) November 2, 2019

London Fried Chicken Territories

London chicken territories, based on purveyors of fried chicken. #30DayMapChallenge #Day28 #Funny pic.twitter.com/DJZxBOqHrE

— Heikki Vesanto (@HeikkiVesanto) November 28, 2019

and whatever this is.

Mapping #30DayMapChallenge pic.twitter.com/ZpJpJpKJBN

— emil (@57×025) November 28, 2019

For more here is a huge gallery of submissions.