Happy Earth Day DC! This week, there are several great meetups and events, on a wide range of topics including mobile user experience (UX) design, data visualization, business development and more. Tonight, Data Visualization DC kicks off the nationwide Big Data Week, with their meetup at iStrategyLabs.

And if you happen to be in the Chicago area this weekend, join MapBoxers Alex Barth and Tom MacWright at Chicago Hack Week, from Friday April 26th through Sunday April 28th.

Monday, April 22

6:30 pm — 8:30 pm

Data Visualization DC: This month, Data Visualization DC in association with Big Data Week present Professor Ben Shneiderman for their Big Data Visualization meetup. Shneiderman will be giving a talk about “Information Visualization for Knowledge Discovery: Turning Messy BigData into Actionable SmallData”.

6:30 pm — 9:30 pm

Startup Grind DC: This month, Startup Grind DC is featuring Dr. Magid Abraham, CEO and cofounder of Internet Market Intellegence company, comScore. Come learn about Abraham, and how he built comScore into one of the leading internet companies that provides insight for the digital world. The event will be held at 1776.

8:30 pm — 1:30 am

DC Nightowls Coworking Session @ UberOffices: This week’s Nightowl meetup is going to be held at UberOffices in DC. Ram Singh of 10.io will be running a Lean Canvas business development group during the meetup to assist local startups develop successful business models. As usual, Bring Your Own Project and be prepared to be productive.

Tuesday, April 23rd

6:00 pm

MapStoryDC: The April MapStoryDC meetup is focusing on building the local DC MapStory database. If you are interested in the power of mapping and data visualization — come and put your head together with likeminded individuals to develop some more useful and informative MapStories for the DC region. Some great DC focused MapStories: Commuting by Bike in DC & History of DC Metro Lines. Go to MapStory.org for more.

Wednesday April 24th

6:00 pm

MoDevDC: To prepare for next month’s MoDevUX 2013 conference, MoDevDC will focus on mobile UX, design and interface. Samsung Developers will also be joining the meetup to provide a look at some of the latest SDKs available from Samsung. As an added bonus, they will be giving away a Samsung Galaxy device to one lucky attendee, you won’t want to miss it!

Thursday, April 25

6:30 pm

OpenStackDC: Join the open-source, cloud software builders of OpenStack for their meetup at The Warehouse Theater. This month, there will be talks using OpenStack in several different capacities from Dr. Steve Crago of USC and the Information Sciences Institute, Drew Dimmick of HP Cloud Services, and more. There will also be an open floor discussion about scaling OpenStack.