MapReduce

**Greetings, GeoDC Friends!** **We're back this month for a Meetup on Wednesday, March 11th at Sudhouse DC.** **This month, we'll have our usual networking chats, job and event announcements and lightning talks from our community members.** **\>\>Please complete this form if you would like to present next week or any other upcoming MeetUp event\. :** [https://docs.google.com/forms/d/10Yj1-BOBXHqtoepJNW2X1WRzmdMjvbBPB8F5fgu5Lhk](https://docs.google.com/forms/d/10Yj1-BOBXHqtoepJNW2X1WRzmdMjvbBPB8F5fgu5Lhk) **Speaker Lineup** **David Bleecker: Open Source Mapping of Gravity Anomalies: What They Are and What We Can Learn** * *This talk will be an introduction to bouguer anomalies (aka gravity anomalies) in the field of geophysics, and the application of bouguer anomaly maps to modern GIS tools. The first section will be an overview of what a bouguer anomaly is, how to interpret maps of bouguer anomalies, and how the modern space-based bouguer anomaly mapping satellites work. The second section will focus on the results obtained by analysis of the bouguer anomaly map data taken from the best available public dataset (GGMPlus), with an emphasis on specific locations that are especially prominent anomalies, what geology and geophysics tells us about what the causes of these localized anomalies may be, and (time permitting), a brief foray into some of the unanswered scientific questions that remain regarding the cause of certain localized anomalies.* **Ben Ballerstein: Crash Cartography: Mapping a Year of DC Bicycle Collisions** *\>The presentation is a walkthrough of the design and build of an animated web map visualizing bicycle collisions in Washington\, D\.C\. in 2025\. This independent project used open\-source software and data from Washington D\.C\.'s open data platform\. The presentation walks through the analysis process from concept\, data acquisition and cleaning\, geospatial processing in QGIS\, and presentation in MapLibre with custom data visualizations\.* *\***We're getting a jumpstart to Spring Cleaning this year as well.\**** **On March 11, we will have GeoDC's first-ever Geo-Swag Swap.** * **If you've been to any conferences or trainings lately, you may have found yourself wondering 'how in the WORLD did I accumulate so much stuff?'** * **Bring your unused or lightly used Geo Themed SWAG to Sudhouse DC on the 11th.** * **The Swag Swap table will be by the staircase, right as you enter into the event space on the 3rd floor.** * **Please take what you need/want from the table; all unwanted items will be donated or recycled** ***-You do not need to bring Swag to particpate.*** ***\- Examples of Swag: notebooks\, mousepads\, pint glasses\, tote bags\, pens\, pins\, stress balls\, decals\, lens cleaners\, rulers\, magnets\, laser pointers\, lip balm\, etc\.*** **Looking forward to seeing everyone next week!**

Join us for some focused writing time. All writers and all experience levels are welcome and don’t worry, no one will see what you've written. This session is about getting your writing done and meeting other writers in your area. When you show up, say hello to everyone, grab a drink, and get your writing tools ready. Once you’re all settled, take some time to chat with your fellow writers. Once everyone’s arrived, I will lead quick introductions and then set the timer for our quiet and focused writing session. Afterward, we’ll have time to chat and get to know each other. We often talk about our successes and challenges as writers. If you don’t have time to stick around, no worries! **A note about the format** We don’t host critiques or readings. These events are a safe space for writers of all skill levels and genres to work on their craft, so no one will read or critique your writing. For our full event schedule, visit [https://shutupwrite.com](https://www.shutupwrite.com). **Other Important Details:** WiFi name/password: [PLEASE INCLUDE DETAILS] Travel / Parking info: [PLEASE INCLUDE DETAILS] Venue Guidelines: Please thank our hosts by purchasing something.

At this event you'll discover how to better understand and control your subconscious mind, helping you overcome doubts and fears. If you have anger issues, depressions and anxieties. this event will show you how to overcome them.

Hello everyone! Who doesn't love Pizza! We'll be meeting at Andy's Pizza in Tyson's Galleria and doing some old-fashioned networking, beer-drinking, and pizza-eating. I guarantee a fun time, or else your pizza is free :) **Location:** Andy's Pizza, Tyson's Galleria, 2001 International Dr, McLean, VA 22102 **Overview:** Join us at AI Innovators Network for our upcoming meetup in Tysons dedicated to exploring the latest trends in Artificial Intelligence. Whether you're an AI enthusiast, a professional, or someone curious about the intersection of technology and AI, this event is perfect for networking, learning, and sharing insights. Connect with like-minded individuals from DC, Northern Virginia, and Maryland as we dive deep into the opportunities and challenges of integrating AI. Don't miss this opportunity to be part of the conversation driving innovation and progress in Artificial Intelligence.

\-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LU.MA)!](https://luma.com/12sf0fvk) \-\-\-\-\-\- Join us for an evening of collaborative problem-solving as we work on a variety of civic tech projects together. Project needs vary but often include brainstorming, researching, writing, coding, or analyzing data. Check out [our website](https://www.civictechdc.org/projects) for a list of projects which may make an appearance! Meet other civic tech enthusiasts. Learn new skills. Contribute to a project to improve a local civic issue. **All are welcome and collaboration is encouraged.** Laptops are recommended but not required. **Where do I register?** To better serve our growing community, we’re transitioning our event registrations to [Luma](https://luma.com/civic-tech-dc)! **We still love Meetup** Meetup has been an incredible platform for us to build and connect with our community. We’ll continue sharing upcoming events there so that new people can find us, but [Luma](https://luma.com/civic-tech-dc) will be our primary registration platform moving forward. **Why we're making the switch** Meetup’s registration system has some limitations, and we need more flexibility to manage sign-ups and engagement. \-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LU.MA)!](https://luma.com/12sf0fvk) \-\-\-\-\-\-

DC Rockers presents two great bands at Tommy Joe's in Bethesda on March 14. The Redactions will kick off the show at 6:30 pm with a mix of classic rock hits, followed by Seattle Sound System at 8:30 pm, playing the best rock from the 90s and 2000s. Admission is free, the food is great, and the bands are awesome, so please come check us out

In March of 2026, the long-time staple of Kubernetes ingress controllers, ingress-nginx, will stop receiving security patches and regular updates. For many Kubernetes operators, this is a forcing function for us to migrate to a new solution that supports the newer Gateway API. The ecosystem of solutions in this space is large and complex, and operators find themselves weighing a myriad of options. In this talk, I hope to answer many questions that we have had to answer in this space, such as: * What are the advantages of Gateway API over the Ingress API? * Which Gateway API Solution should you use for different scenarios * Why not simply migrate to another ingress controller? * Where does the AWS Load Balancer Controller fit in this new ecosystem? * What does support for WAF, ALB, NLB, etc. look like going forward? **Timeline:** **6:00 PM** \- Doors Open\. Please be prepared to show ID that matches your registration\. **6:30 PM - 7:30 PM** \- Speaker **7:30 PM - 8:00 PM** \- Networking **8:00 PM** \- Event ends\. Conversation continues at Highline for anyone interested\.

**Pre-Registration is REQUIRED. RSVP here - [https://luma.com/6twkovvg](https://luma.com/6twkovvg)** ## ODSC AI x Snowflake Present: AI Innovation in the Capital **Our premier Washington D.C. AI Meetup of March 2026!** Skip the usual AI hype and join us in the District for an evening of technical deep dives and high-level networking. We’re bringing together **D.C. builders, data scientists, and engineers** to discuss how to bridge the gap between AI experimentation and enterprise-grade deployment. Come for the networking, stay for the expert insights from the Snowflake team, and leave with a sharper strategy for scaling AI in 2026. ## The Session **Topic: Engineering the Future of Enterprise AI (Title TBA)** *Official topic and abstract coming soon!* While the specific title is under wraps, **Matt Harris** typically explores the intersection of high-performance data architecture and generative AI. Expect a session focused on how organizations can leverage Snowflake’s evolving ecosystem to build secure, scalable, and governed AI applications that go beyond the chat box and into core business logic. **Speaker:** Matt Harris, Principal AI Strategy Architect (FSI at Snowflake [https://www.linkedin.com/in/matthew-d-harris/](https://www.linkedin.com/in/matthew-d-harris/) Matt is a veteran in the data space, serving as a Principal Solutions Engineer at Snowflake. He specializes in helping complex organizations transform their data architecture into a competitive advantage. With deep expertise in the Snowflake Data Cloud, Matt focuses on making advanced data science and AI accessible, governed, and ready for production environments. ## Why Attend? * **Network with the Best:** Connect with AI practitioners and data leaders in the D.C. tech and public sector ecosystem. * **High-End Experience:** Enjoy bites and refreshments in a professional, collaborative environment. * **Exclusive Insights:** Get a direct line to Snowflake’s technical leadership on where enterprise AI is headed next. ## Agenda * **6:00 PM – 6:30 PM:** Networking & Bites/Drinks * **6:30 PM – 7:15 PM:** Presentation by Matt Harris, Principal Solutions Engineer at Snowflake * **7:15 PM – 7:30 PM:** Interactive Q&A * **7:30 PM – 8:00 PM:** Networking & Closing **Venue:** Mindspace, 1301 K Street Northwest, Washington, DC 20005 **RSVP now to secure your spot!** ## Useful Links * **Free access to more talks/trainings:** [Ai+ Training platform](https://aiplus.training/) * **ODSC Blog:** [https://opendatascience.com/](https://opendatascience.com/) * **Join the Community:** [Slack Channel](https://www.google.com/search?q=https://odsc.ai/slack) * **Code of Conduct:** [https://odsc.ai/code-of-conduct/](https://odsc.ai/code-of-conduct/)

Come join us for informal discussions about AI, and meet others who are passionate about the subject!

**Schedule** 5:00 pm - 5:30 pm - Sign-in/Meet and greet/networking 5:30 pm - 7:00 pm - Break the Cloud Lock-in: Building Adaptive Intelligence Orchestration with DIO 7:00 pm - 7:45 pm - Leaning on the SQL: Crafting Resilient Data Layers **Talk and Speaker Details** **Time**: 5:30 pm est. **Title**: Break the Cloud Lock-in: Building Adaptive Intelligence Orchestration with DIO **Summary**: AIaas are often stuck in a binary choice: pay the "token tax" for convenient Cloud APIs or manage the complexity of local open-source models (Llama/Mistral) yourself. The future belongs to a hybrid architecture—but the routing logic shouldn't be spaghetti code. In this session, we introduce DIO (Distributed Intelligence Orchestration), a new open-source framework designed to bridge on-premise infrastructure and cloud capabilities. We will move beyond theory and look at the code behind the Federated Decision Engine (FDE)—the algorithm that allows you to dynamically route prompts based on privacy, cost, complexity, and more. **Session Takeaways:** \- The DIO Architecture: A technical deep dive into the open\-source framework that decouples your application from specific model providers\. \- Live Integration: How to implement the DIO SDK to build a "Smart Router" that connects the best of both world for Cloud & On Prem Intelligence\. **Speaker**: Snow Zhao **Speaker Bio**: Founder & CEO of AIgentic \| Ex\-Meta engineering leader\. Building the future of professional services with precision & trust\. Snow has decades of Silicon Valley experience building and scaling technology organizations at Facebook, Block (Cash App), and Groupon. She is currently building at AIgentic, an applied AI company designing robust, trustworthy AI systems for professional industries. She leads global teams that delivered secure, high-performance systems used by billions, from product infrastructure behind Messenger’s rewrite and end-to-end encryption, to architecting enterprise AI platforms that bridge traditional sectors with digital transformation. Her work has spanned mobile, security, open-source, federated architecture, AI-powered automation, cross-platform software ecosystems, and more — always guided by the principle that engineering excellence is a human discipline as much as a technical one. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Time**: 7:00 pm est. **Title**: Leaning on the SQL: Crafting Resilient Data Layers **Summary**: Most apps need to persist data. The mechanisms for persisting vary, from key-value pairs to relational databases to files and more. SQLite is the de-facto standard for persistence in mobile apps: it ships with every Android and iOS app. This session looks into best practices for SQLite data persistence, drawing from practical, digestible, real world examples. We look into when one should lean on the SQL versus when to perform data manipulation in application code. We look at some examples of constraints that you might have written in Kotlin/Swift, and how expressing them in SQL instead can offer data consistency and integrity benefits. A major focus of the session is on migrations. Data schemas inevitably evolve, and executing migrations carefully is essential, as mistakes can have severe consequences, including data corruption. We look into best practices for migration, including when to do migration in application code versus in SQL. We also examine some real world migration examples beyond the simple case of adding a column with a default value. Finally we look at migrations that cross data sources. This could occur if for example you were persisting data in a key-value store but you now want to migrate that to a database table. This must be done in application code but can you still take advantage of database migrations? Can you cover your migration code with unit tests? **Speaker**: Kiran Raon **Speaker Bio**: Two decades as a developer, got into Android in 2010. Adopted Kotlin in 2017, had my first attempt at KMP in 2019 (when it was still called KMM). Worked on and off with iOS and web client technologies throughout my career, also dabbled in other cross platform technologies. Full-fledged Mobile developer since 2023. **How to find us:** 1680 Capital One Drive, McLean, VA 22102 We'll be located in C2 **100 D/E**. The area is publicly accessible. If you can't find it, you can ask the front desk for directions to the **C2 100 D/E** **Attending Virtually?** [https://us06web.zoom.us/j/84418455380?pwd=fJczZgKv2BaGVPLi7azEr3XAJMPvBR.1](https://www.google.com/url?q=https://us06web.zoom.us/j/84418455380?pwd%3DfJczZgKv2BaGVPLi7azEr3XAJMPvBR.1&sa=D&source=calendar&usd=2&usg=AOvVaw2giIJenXoEsPXfYgNs_atJ) Meeting ID: 844 1845 5380 Passcode: 369382 **Parking**: You can park at 1680 Capital One Drive; this garage has a sign indicating public parking. Or at the WEGMANS parking lot.

Danceintime runs Cuban Salsa Classes & Social Dancing Every Saturday, all year-long. Come at 1:15 pm to sign in. Stay till 4 pm. Some of us go out for coffee or a bite to eat afterwards and everyone is welcome! $15/person. Cash, PayPal, Venmo, Apple Pay, or Card accepted. Chevy Chase Baptist Church; 5671 Western Ave. NW; Washington DC 20015. NOTE: Enter through back corner door of the church. Danceintime classes are great fun. The dance moves are beautiful, fun, and our class creates a bonded community... Check it out! Class will be held every Saturday in December....celebrate the holidays with dance! For more info: danceintime.com/classes Questions? Contact Barbbernsteintalks@gmail.com

ike Turkey Run Park- Pho Lunch, VA Sunday March 8 With winter weather receding, this is a great way to fight cabin fever and head back outside with views of the Potomac. This is a 3 to 4 mile loop hike along the Potomac River just below the American Legion bridge off the GW parkway. The trail is mostly easy and flat, but there are some slightly rocky areas. Be aware that this time of year where segments along the river can be muddy and there are some rocky areas we must maneuver around. Bring a mascot! The park is dog-friendly, but must be on a leash. For more info and maps (see side links): [https://www.nps.gov/gwmp/planyourvisit/turkeyrun.htm](https://www.nps.gov/gwmp/planyourvisit/turkeyrun.htm) What to Bring: Good hiking shoes Water Meet: 9:00 am Where: Parking Lot C-1. (First parking lot when entering park. See map at link below for details) Park Trail Map: [https://www.nps.gov/gwmp/planyourvisit/upload/Corrected-Turkey_Run_Park_Trail_Map_11242023_508c.pdf](https://www.nps.gov/gwmp/planyourvisit/upload/Corrected-Turkey_Run_Park_Trail_Map_11242023_508c.pdf) Departure: 9:10 sharp. We should return to the parking lot no later than 11:15 am. For those interested, we can later head over to nearby Pho 75 (1721 Wilson Blvd) for a great hot pho - one of the best in the area. **Note: Cash Only!** **In the comments section please indicate if you need a ride. If you are coming by car and wouldn’t mind picking someone up at a convenient metro stop, please indicate how many people you can take. Hopefully we’ll have enough room for everyone. I can pick up three at the Braddock Road metro (yellow), located in Alexandria, VA. Or, I can pick up folks at Rosslyn metro (orange/blue). Carpoolers, please chip in generously for gas.** Note: This event is cross-posted with other Meetup groups.

Discover Kiro, AWS’s innovative development environment that adapts to your workflow. Whether you prefer specification-driven development or a more intuitive, vibe-based approach, Kiro empowers you to build applications your way. In this session, speakers will explore Kiro’s core functionality and its evolution through re:Invent 2025, along with demonstrations of prompts used to create APIs, hooks, and steering documents. In the latter part of the session, watch as we build a complete example from scratch, showcasing Kiro’s agentic AI workflow in action for spec-driven development and vibe coding. What You'll Learn - Core Kiro concepts and development philosophy Feature evolution: pre and post re:Invent 2025 Practical examples: API creation, hooks, and steering docs Live coding demonstration with real-time problem solving Who Should Attend - Developers, solutions architects, and technical leaders interested in modern AWS development tools and AI-assisted coding workflows. **Speakers Bio:** Matthew Jorat: Matthew Jorat is a Customer Solutions Manager at AWS with nearly three decades of expertise in AI, cloud transformation, migration, modernization, IT, technology, and business. His career spans infrastructure engineer, solutions architect, security auditor, customer success director, support and services director, and operations officer. He was an early adopter of AWS services as a customer, and his current role at AWS uniquely blends his technical and business skills as he partners with executive teams to translate strategic priorities into measurable business outcomes through cloud adoption, AI implementation, and operational excellence. Matt leads end-to-end AI initiatives for enterprise customers, identifying high-impact use cases and maintaining relentless focus on measurable ROI. He holds eight AWS certifications and serves as Adjunct Professor at Franklin University teaching cloud computing and AWS architecture. His expertise encompasses GenAI, agentic AI systems, migration, modernization, and optimization strategies that drive transformation at scale. [https://www.linkedin.com/in/mattjorat/](https://www.linkedin.com/in/mattjorat/) Girish Bhatia: Girish Bhatia is a seasoned technology delivery leader with deep expertise in cross-domain program management. He holds multiple AWS certifications, including AWS Certified Solutions Architect – Associate, AWS Certified Developer – Associate, and AWS Generative AI Practitioner, and is also an AWS Community Builder. Girish brings over two decades of experience in the information technology industry. Throughout his career, Girish has led major technology-driven business transformation from modernizing on-premises applications to driving large-scale cloud migrations. His work includes API-based integration platforms, data-center and mainframe modernization, and enterprise cloud adoption initiatives. Based in Columbus, Ohio, Girish works at a tech-forward fintech company. He is passionate about AWS serverless architectures, Generative AI and emerging cloud technologies. An avid learner and builder, he continues to explore and apply the latest innovations in AWS to help organizations accelerate their digital transformation. https://www.linkedin.com/in/girishbhatia/[https://www.linkedin.com/in/girishbhatia/](https://www.linkedin.com/in/girishbhatia/) **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

One of the most valuable parts of this community is the opportunity to think out loud with other product professionals. This session is built for exactly that. As we wrap up the quarter, it’s a great time to pause and reflect. What’s on track? What needs adjustment? Where could a small shift create bigger impact? Join fellow product professionals for a focused, interactive conversation designed to help you recalibrate for the next quarter. You’ll have the opportunity to share where you are, hear how others are thinking through similar challenges, and gain fresh perspective you can bring back to your team and organization. We’ll gather at 8:00AM, with discussion starting promptly at 8:15AM. 📍 First Watch - 7227 N High St Located in: The Shops at Worthington Ample parking is available. Food and beverages will be available for purchase. Start your morning with clarity and connection — we hope to see you there! ☀️

Window functions have nothing to do with the Windows operating system but provide a “window” to a result set when used in SQL queries. They are powerful, set-based methods to view data in unexpected ways. Window functions provide easy, set-based solutions to solve some common problems: * Using running totals * Performing operations in intervals * Identifying data gaps and islands * Performing aggregates without losing detail Many people are confused by window functions and do not know how to use them properly. This session will explore window functions, how they work, and how to use them. Demonstrations with several examples will solidify how window functions can simplify queries and make them more powerful.

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant.

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

Jimmy V's Grill & Pub in Grandview Heights. We meet in the bar in the room on the right (the cigar shop). You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. *** Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ).

Drake Lundstrom is presenting: Code Anywhere by Talking to your Phone Abstract: Have you heard the trend of people deploying code anywhere from checkout lines to doctors' offices? In this talk, you will learn how to talk to your phone and have an app on Azure to show your friend 5 minutes later. The basic DevOps tools you already know, plus a little bit of AI magic, are all you need! If you want to follow along, the demo will be in Azure with GitHub Actions and GitHub Copilot, and you can have it set up on your phone by the end of the session. Just come in with an Azure account and a GitHub repo. Join us for pizza, drinks, and networking @ Improving's office. Doors open at 5:45.