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I’m passionate about turning data into beautiful, meaningful visuals that tell a story that helps connect knowledge to action.

Maps

Colorado Terrain Map
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Terrain Map of Colorado

This is a terrain map of Colorado with a custom color scheme, ranging from yellow, green, to light blue for the highest elevation. I used a subtle 3-d, textured styling for this map, which is inspired by John Nelson’s pan oblique tutorial. Designed in ArcGIS Pro.

CO River Basin
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Yampa River Highlight in Colorado River Basin Map

This is a map of the Upper Colorado River Basin, with the Yampa River, a tributary of the Colorado, highlighted in the upper-right hand corner. I created this map to be used in a series of presentations and other communications regarding conservation projects led by Yampa Valley Sustainability Council. Designed in ArcGIS Pro.

Upper Yampa River Topo Map
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Upper Yampa River Topographic Map

This is a topographic map of the Upper Yampa River Basin with a contour interval of 100ft. Designed in QGIS.

Routt County Map
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CA County-Level AQI

This is a map of Routt County, Colorado. This was designed to be used in presentations and other communications for Yampa Valley Sustainability Council. Designed in ArcGIS Pro.

Upper Yampa River Basin
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Upper Yampa River Basin

This is a map of weather and climate monitoring stations in the Upper Yampa River Basin. It was designed for Yampa Valley Sustainability Council in support of their Y-Basin Monitoring Network design. Designed In ArcGIS Pro.

Routt County Average Precip
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Pepper Headshot 3

This is a map of the average total annual precipitation in Northwestern Colorado from 1991 - 2020. Precipitation values range from orange (8 inches per year) to dark blue (72 inches per year). It was created using data from PRISM Climate Group at Oregon State University. Designed in ArcGIS Pro. .

CA County-Level AQI
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CA County-Level AQI

This is a map of California Counties shaded by their percentile rankings for average PM 2.5 levels compared to national values. Darker orange indicates areas in the highest percentiles (80-100%), while lighter yellow represents those in the lowest percentiles (0-20%). I created this map using the US EPA’s EJ Screen Data. Designed in R-Studio.

CA County-Level Low Income
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CA County-Level Low Income

This map of California Counties is shaded by the percentage of the households with low income. Darker purple indicates areas in the highest percentages (40-50% of households), while lighter purple represents those with lower percentage (10-20% of households). I created this map using the US EPA’s EJ Screen Data. Designed in R-Studio.

Tulare County CA Percent POC
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Tulare County Percent Households with People of Color

This map of Tulare County shows census tracts shaded by the percentage of the population that identifies as people of color. Darker blue indicates areas in the highest percentages, while lighter blue represents those with lower percentage. I created this map using the US EPA’s EJ Screen Data. Designed in R-Studio.

Tulare County CA Low Income
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Tulare County Percent Cancer Rate

This map of Tulare County shows census tracts shaded by their percentile rankings for cancer risk compared to national values. Darker green indicates areas in the highest percentiles (80-100%), while lighter green represents those in the lowest percentiles (0-20%). I created this map using the US EPA’s EJ Screen Data. Designed in R-Studio.

LA Redlining Map
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Los Angeles Historic Redlining Map

The above map displays the Home Owners’ Loan Corporation (HOLC) Grades, also known as redlining, in Los Angeles, California. Historically, these boundaries were used by mortgage lenders to identify ‘hazardous’ or high risk areas predominately made up of black and minority populations, as well as low income areas, to avoid for mortgage lending. Practices like redlining are a clear illustration of systemic racism and the enduring legacy of slavery. Impacts from redlining are still being felt today. Designed In R-Studio.

Houston Power Outage
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Power Outage Animation

This animation shows a map of Houston’s night light intensity on a typical night before the storm (February 7, 2023), compared to night light intensity after the storm (Feb 16, 2023), when the Houston region in Texas experienced widespread power outages. The night light intensity ranges from no light (dark blue), to pink (mid light intensity), to yellow (highest light intensity). Designed In R-Studio.

Morgan Creek Fire Map
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Antarctica

In 2020, the Morgan Creek Fire burned over 7,500 acres. The above satellite image, from Copernicus Sentinel-2, was taken on October 6, 2020. This image rendition utilizes the near and shortwave infrared reflectance to highlight the fire’s active burn in bright red, its burn scar in deep red, and the resulting smoke blowing to the east in an ambient blue. Designed in Google Earth Engine and QGIS.

Morgan Creek Fire Map
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Morgan Creek Fire Map

In 2020, the Morgan Creek Fire burned over 7,500 acres. The above satellite image, from Copernicus Sentinel-2, was taken on October 6, 2020. This image rendition utilizes the near and shortwave infrared reflectance to highlight the fire’s active burn in bright red, its burn scar in deep red, and the resulting smoke blowing to the east in an ambient blue. Designed in Google Earth Engine and QGIS.

Data Viz

US FEMA Risk
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This boxplot shows how FEMA National Risk Index scores for counties in California compare to those in other states. The plot shows the distribution of county FEMA Natural Hazard Ratings for counties on the x-axis, grouped by state on the y-axis. The plot reveals that California counties face the greatest natural hazard risk in the United States. With more than 75% of its counties falling above relatively moderate risk and more than 50% of counties falling in the high risk category.

This boxplot shows the distribution of natural hazard risk exposure (x-axis) by county for states in the continental U.S. (y-axis).FEMA’s NRI risk scores run from 0 to 100 with increasing severity. This plot reveals that California counties face the greatest natural hazard risk in the United States. With more than 75% of its counties falling above relatively moderate risk and more than 50% of counties falling in the high risk category. Created in R.

CA FEMA Risk
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This stacked barplot shows how climate hazard risk exposure varies across racial and ethnic groups in California. The x-axis represents the proportion of natural hazard risk exposure, while the y-axis categorizes populations by race and ethnicity from the U.S. Census Bureau. Bars are color-coded to indicate FEMA's Natural Hazard Risk Ratings: Relatively Moderate, Relatively High, and Very High. While almost all counties across California are exposed to moderate to high risk, this plot highlights that the distribution of risk is not uniform across race. Notably, 74% of Black and Asian populations, fall into the Very High risk category, the highest proportion among race groups. In comparison, 60% of white individuals and 58% of native Hawaiian/pacific islanders, fall into this category.

This stacked bar plot shows the proportion of natural hazard risk exposure (x-axis) by race and ethnicity (y-axis) in California. While almost all counties across California are exposed to moderate to high risk, this plot highlights that the distribution of risk is not uniform across race. A higher proportion of certain race classes, including those who identify as Black/African American and Asian classes, are especially exposed to the highest risk class. Important to note, this plot only considers risk for counties in California with a population greater than 65,000. Created in R.

Emissions by Country
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Fishing vessel emissions by country

This plot shows the proportion of global fishing vessel emissions by country from 2016 - 2014. Data source is Global Fish Watch. Designed in R-Studio.

Emissions by Country
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Fishing vessel emissions by gear type

This plot shows the proportion of global fishing vessel emissions by gear type from 2016 - 2014. Data source is Global Fish Watch. Designed in R-Studio.

Peak SWE
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Line graph showing the change in peak SWE at the Tower Station in Northern Colorado.

This graph highlights Snow Water Equivalent data for the Tower SNOTEL station, data provided by USDA NRCS. The graph was created for Yampa Valley Sustainability Council. Created in Microsoft Excel.

Interactive Visualizations

  • YRFRP StoryMap
  • Yampascaping Guide
  • Y-Basin Map
  • YVCC Map

Infographics

An Upstream Battle
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An Upstream Battle

Winter-run Chinook salmon narrowly avoided extinction in 1990s. While their numbers have made a slight recovery, their upstream battle continues as they face ongoing threats like warming rivers and habitat loss. Keeping rivers cool is one of the most critical ways to protect them. Designed in R-Studio and Affinity.

Riparian Areas
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Benefits of Yampascaping.

This is an infographic that provides an overview of the benefits of healthy riparian areas and provides three simple tips for how homeowners can help protect and enhance them. I created this to support a riparian health initiative by Yampa Valley Sustainability Council. Designed in Adobe Illustrator and Canva.

Riparian Areas
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Ways that homeowners can protect and enhance riparian areas.

This is an infographic that provides an overview of the benefits of healthy riparian areas and provides three simple tips for how homeowners can help protect and enhance them. I created this to support a riparian health initiative by Yampa Valley Sustainability Council. Designed in Adobe Illustrator and Canva.

Riparian Education
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Benefits of planting trees along mountain rivers.

This is an infographic that provides an overview of the benefits of planting trees along rivers. I created this to support an initiative of the Yampa River Forest Restoration Project led by Yampa Valley Sustainability Council. Designed in Adobe Illustrator.

Riparian Education
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YVSC Strategic Priorities.

This is an infographic that provides an overview of the 2022 - 2026 Strategic Priorities for Yampa Valley Sustainability Council. I designed this to support their 5-year strategic planning process. Designed in Adobe Illustrator.

Riparian Education
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Benefits of planting trees along mountain rivers.

This is an infographic that provides an overview of the datasets that were included in a spatial statistical analysis to support the Y-Basin Integrated Network project led by Yampa Valley Sustainability Council. Designed in Adobe Illustrator.

Videos

Copyright 2025, Nicole Pepper

 

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