Map data from USGS DEM and NLCD 2006. Original map produced by Carl Sack, 2012 (CC-BY-SA).

Welcome to my website. A little bit about me: I make maps. I teach. I enjoy being in nature, exploring new places, and building community. I like to eat good food and read good books that make me think. I am a strongly-motivated justice seeker looking for ways that mapping can empower the marginalized and oppressed in society. I am a proud new father. Of my many useful skills and likeable attributes, I believe the most important is that I am a life-long learner, which entails a constant search for new knowledge and skills and teaching others what I know.

"In every outthrust headland, in every curving beach, in every grain of sand there is the story of the earth."

-Rachel Carson

All work on this page is authored by Carl Sack and licensed Creative Commons (CC-BY-SA).

Rivers At Risk: This is a series of maps I started work on to show the location of each segment of Enbridge Energy's Line 61 and Line 5 pipelines and the rivers they cross that would be threatened by an oil spill. Enbridge's Line 61 is in the process of expansion up to 1.2 million barrels per day of tar sands oil, 150% of the capacity of the more famous (and failed) KeystoneXL pipeline. Enbridge is considering constructing a "twin" to Line 61 that would carry an additional 450,000 barrels per day.

Maps for Capitalism, Nature, Socialism: I create about one map every two months pertaining to an environmental justice issue on contract for the peer-reviewed journal Capitalism, Nature, Socialism.

A Sand County Disappearing: Frac sand mining has exploded in Wisconsin over the past two years, raising concerns about air and groundwater pollution in the western part of the state. Of even greater concern is where the sand goes: it's fueling a boom in hydraulic fracturing or fracking, a natural gas extraction technique that has contaminated drinking water supplies with methane and a soup of cancer-causing chemicals. (view small)

Mining In Northern Wisconsin: In 2002, another UW Geography grad student, Zoltán Grossman, created a map showing all of the active prospects for mines in the northern part of the state. Mining is once again a hot-button political issue, so I decided that an updated version of Zoltán's map would be a useful information resource for the concerned public. We worked together to update and distribute the map, keeping the original black-and-white design for simplicity and reproduceability.

Water On the Line: I believe in using maps to advocate for communities and the environment. My map of the proposed Penokee Mine site in northern Wisconsin was reprinted hundreds of times and used by legislators, local residents, and environmental activists around the state.

Other Penokee Maps: Between 2012 and 2014 I made a number of maps of the Penokee Hills and Bad River Watershed, both for public use and for activists seeking a better understanding of the scope of the proposed mine. Although less widely distributed than Water on the Line, many of these maps were nonetheless used by many and had an impact on the struggle. The Penokee Mountains Heritage Park map in particular was an imaginative collaboration with the Lac Courte Orielles Tribe's Harvest and Education Learning Project to envision what kind of cultural, economic, and recreational resource the Penokee Hills could be if preserved for future generations.

Madison Light Rail: What if Madison, Wisconsin had a light rail transit network? What would such a network look like if developed cost-effectively, using mostly existing rail corridors? What benefits could it bring to workers, commuters, and the local economy? I became curious about these questions and decided to pursue them through an independent mapping, spatial analysis, and info graphic project over the summer of 2014.

Passenger Rail in the United States: The U.S. once had the most advanced, widespread passenger rail network in the world. Our system today is a shambles, while other nations continue to make advances that put rail as the cleanest, safest, most comfortable, and in many cases fastest way to travel. High-speed rail advocates in this country have put forward proposals for decades, but keep running into a brick wall of powerful car makers and oil companies that keeps the federal subsidies to new road construction flowing. The recent $8 billion infusion of cash is a start, but miniscule compared to what the feds pump into car travel every year and what is needed to get us back on track. This graphic poster makes the case for a real rebuilding effort that could put a nation to work and slash our use of fossil fuels. Find a high-resolution version here.

Child Suicide: Choropleth maps are dramatic representations of data that activate visual thinking, allowing the map user to make meaning from information that would be otherwise tough to parse. Difficult problems and overlooked topics can be brought into the light of public scrutiny, creating a force for change.

Major Coal Mines: Much scrutiny has been given to the destructive practice of mountaintop removal coal mining in Appalachia, but as I was surprised to discover while making a Wikipedia-style proportional symbol map of this dataset, the vast majority of domestically-produced coal now comes from mines in Western states. In fact, only two of the 60 most-producing coal mines are West Virginia MTR mines.

Ashland County Themes: These maps required a combination of spatial analysis operations along three different themes. I went beyond ArcGIS and added a little extra flair to them in Illustrator.

Duluth Trails: An as-yet-unfinished project predating my move to grad school, I intended to create a trail guide to Duluth, Minnesota and vicinity. This urban metropolitan area contains thousands of acres of public land ranging from developed parks to near-wilderness, and over 100 miles of nonmotorized recreation trails. I wrote descriptions and created aesthetically-pleasing maps of most of the trail systems in and around the city.

JavaScript maps:

Senegal Transhumance: This map was designed to display data collected on livestock resting points and watering points along herding corridors in western Senegal, and to allow additional data to be uploaded by trusted local parties. The goal of the project is to provide Senegalese policymakers with an idea of where herding routes—and thus herders' livelihoods—are threatened by agricultural expansion. The project is directed by UW Geography Professor Matt Turner; the data was collected by Senegalese research assistants and processed by other UW-Madison graduate students. The map will officially launch in the spring of 2016.

Global Madison: This is an online, responsive situated learning application designed for the Introduction to Global Studies course at UW-Madison. Designed for mobile, it provides a browser-based guided tour of five key sites in Madison's East Isthmus for investigating changes in different aspects of the global economy from Fordist to Post-Fordist production regimes. The application was designed by a graduate seminar class in which I took part, and I completed the necessary code during the summer of 2014. The app was assigned to students in the Global Studeis course in the fall semesters of 2014 and 2015.

Bad River Watershed Wikimap: For my Master's Thesis project, I developed a crowdsourced web map, or 'wikimap,' of the Bad River Watershed in northern Wisconsin. The map displays features in the watershed added by users, along with user-added text, photos, audio, and video. The goal of the wikimap is to publicize the landscape values associated with places in the watershed that give those places special meaning. The map was built entirely with open-source technologies; the interface uses the Leaflet web mapping library, and the data is passed through PHP, stored in a PostGIS database, and served back to the map by Geoserver as an OGC Web Feature Service.

D3 Lab Prototype: I developed this coordinated visualization example using the D3 JavaScript library, and wrote an accompanying tutorial, as a contribution to updating the UW-Madison Cartography curriculum. My work was used for the third lab in the Interactive Cartography course, replacing a former lab that relied on Adobe Flash. A later version of the prototype and tutorial was published in the cartography journal *Cartographic Perspectives* and is available on GitHub.

Leaflet Lab Prototype: I developed this simple Leaflet web map example, and wrote an accompanying tutorial, as a contribution to updating the UW-Madison Cartography curriculum. My work was used for the first two labs in the Interactive Cartography course, replacing former labs that relied on Adobe Flash.

Queen City Icons: This modest project involved creating a library of icons representing 16 distinct feature types with local significance for Cincinnatians in three broad categories. I used the well-worn Google Maps API (v3) to generate and style the map. It was both an exposition of my skills as a low-pixel-count artist and an exploration of how I make meaning of the places I think of as important in my original hometown.

Renewables Around the World: Over the summer (2012), I participated in a comparitive study of four web mapping technologies run by Dr. Robert Roth through the UW-Madison Cartography Lab. We were asked to map data from the Organisation for Economic Cooperation and Development about energy use from renewable sources in forty countries between 1971 and 2010. I used were the Google Maps API to create my version.

Web Map Services Demonstration Page: Last summer (2012) I had the opportunity to teach myself JavaScript and delve into the exploding world of web mapping libraries, APIs, and services. I put together this page as a way to expose the guts WMS and other RESTful service requests for a tutorial presentation I gave to the student-run GIS Collective. Bonus photo: Me (right) with other members of the GISC during one of our summer collaboration sessions.

Wisconsin Sea Grant Story Map: One of the coolest things about building interactive web maps is the sharing of insights among the online community and the ability to build on the work of others. This was a JavaScript web mapping project that I did for an employer building on one of a series of templates built by programmers at Esri and made available to the public to tell the story of the work that Sea Grant as done around Wisconsin.

Flash maps:

Madison Gap Map: For this project I had the opportunity to work with two peers in the UW Cartography program and a team from the UW Madison Educational Policy Studies program. We created a geovisualization application to examine trends in Madison's student demographics and school achievement metrics, with the goal of addressing the achievement gap between students of different races.

World Mega Cities: This Flash-based interactive map provided my very first computer programming experience. Disclaimer: It was done for a class, not really for the BBC. And it's way cooler than any maps that are actually on the BBC's website. Please don't sue me, Englishpeople.

Lake Superior Watersheds: This was my second Flash map, delving into the world of geovisualization. What I wanted to accomplish required a novel geoprocessing method, for which I used ArcGIS to derive each individual watershed's percentage of each land cover type based on the National Land Cover Dataset (NLCD 2006).

PDF Resumé — last updated 11.15.2015

PDF Curriculum Vitae — last updated 11.14.2013

Northlandia—A Blog About Maps: My personal blog features posts about what I'm working on and learning and want to share with the world. Check it out!

Web Mapping Overview Series: I put together an eight-part blog series detailing what I learned during my summer studying web mapping technologies in 2012, so that others who are just starting out might be able to pick it up faster and not be intimidated. Out of this work, I produced a white paper for UW Sea Grant.

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