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Xan Fredericks

Xan works with the National Geospatial Program as the National Map Liaison to Florida, Puerto Rico, and the U.S. Virgin Islands and is a Geospatial Information Response Team Operations Officer.

Alexandra “Xan” Fredericks is the National Map Liaison to Florida, Puerto Rico, and the U.S. Virgin Islands for the U.S. Geological Survey National Geospatial Program User Engagement Office and serves as a Geospatial Information Response Team Operations Officer. She is the Chair of the USGS Lidar User Group and a member of the Interagency Working Group on Ocean and Coastal Mapping, as well as the Florida Coastal Mapping Program Science and Technical Advisory Council. Xan works to help people, from USGS scientists and our Nation’s residents, to a variety of agencies and entities, discover and coordinate geospatial data to empower location intelligence through outreach, collaboration, and data visualization.
Active in the American Society for Photogrammetry and Remote Sensing (ASPRS), Xan serves as Florida Region President and past GIS Division Director. She is also active in the Urban and Regional Information Systems Association (URISA), serving on the Board of Directors and as Board Liaison to the Community Resilience and Professional Education Committees. Xan is a GISCI-certified GIS Professional and earned a BS in Marine Science-Geology from Eckerd College, as well as a Postbaccalaureate Certificate in GIS and an MGIS from Penn State University.

Education and Certifications

  • GISCI-certified Geographic Information Systems Professional (GISP) #90578

Honors and Awards

  • The USGS Geospatial Information Response Team received a 2021 Esri Special Achievement in GIS award

  • Xan was named one of the 2021 Geospatial World 50 Rising Stars

Science and Products

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FCMaP approach divides Florida into 6 regions

Mapping Florida's Coastal Waters

The FCMaP approach divides Florida into 6 regions that are geologically and physiographically distinct in terms of coastal characteristic.
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Natural Hazards, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Mapping Florida's Coastal Waters

The FCMaP approach divides Florida into 6 regions that are geologically and physiographically distinct in terms of coastal characteristic.
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Photo of U.S. Army Corps of Engineers restoration work on coastline of St. Augustine, Florida

The Florida Coastal Mapping Program

The Florida Coastal Mapping Program (FCMaP) is an initiative between Federal and Florida State agencies and institutions to coordinate and facilitate the collection and accessibility of Florida coastal seafloor data in order to fill priority areas and gaps.
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Natural Hazards, Coastal and Marine Hazards and Resources Program, National Cooperative Geologic Mapping Program, St. Petersburg Coastal and Marine Science Center
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The Florida Coastal Mapping Program

The Florida Coastal Mapping Program (FCMaP) is an initiative between Federal and Florida State agencies and institutions to coordinate and facilitate the collection and accessibility of Florida coastal seafloor data in order to fill priority areas and gaps.
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airborne lidar

Coastal and Marine Geology Program Lidar Coordination

Resources, publications, and contacts for lidar.
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Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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Coastal and Marine Geology Program Lidar Coordination

Resources, publications, and contacts for lidar.
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Coastal Topography-Upper Florida Keys Reef Tract, Florida, 26-30 June 2016

Lidar-derived seamless (bare earth and submerged) topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets of a portion of the upper Florida Keys reef tract were produced from remotely sensed, geographically referenced elevation measurements collected June 26-30, 2016.
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St. Petersburg Coastal and Marine Science Center

Coastal Topography-Chandeleur Islands, Louisiana, 23-25 June 2016

Lidar-derived seamless (bare earth and submerged) topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets of the Chandeleur Islands, Louisiana were produced from remotely sensed, geographically referenced elevation measurements collected June 23-25, 2016.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Eastern Louisiana Barrier Islands, 09 March 2008

These datasets, prepared cooperatively by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center and the National Park Service (NPS), provide lidar-derived first-surface and bare-earth topography for a portion of eastern Louisiana. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) on March 9, 2008.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Northwest Florida, Post-Hurricane Katrina, 2005

These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provide lidar-derived first-surface and bare-earth topography for a portion of northwest Florida. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) in September 2005, immediately following Hurricane Katrina landfall.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Chandeleur Islands, Post-Hurricane Katrina, 2005

These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provide lidar-derived first-surface and bare-earth topography for the Chandeleur Islands, Louisiana. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) on September 1?4, 2005, immediately following Hurricane Katrina's landfall.
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St. Petersburg Coastal and Marine Science Center

Coastal Topography - Assateague Island, Maryland and Virginia, Post-Hurricane Hermine, 10-12 September 2016

Lidar-derived seamless (bare earth and submerged) topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets were produced from remotely sensed, geographically referenced elevation measurements collected post-Hurricane Hermine on September 10-12, 2016.
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St. Petersburg Coastal and Marine Science Center

Coastal Topography - Assateague Island, Maryland and Virginia, Post-Hurricane Hermine, 10-12 September 2016

Lidar-derived seamless (bare earth and submerged) topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets were produced from remotely sensed, geographically referenced elevation measurements collected post-Hurricane Hermine on September 10-12, 2016.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Northern Assateague Island National Seashore, Maryland and Virginia, 2003: Bare Earth

These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in collaboration with the National Park Service, provide lidar-derived bare-earth topography for Northern Assateague Island National Seashore, Maryland and Virginia. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during February 2003.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Assateague Island National Seashore, Maryland and Virginia, 2005

These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center in collaboration with the National Park Service, provide lidar-derived first-surface and bare-earth topography for Assateague Island National Seashore, Maryland and Virginia. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during September 2005.
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St. Petersburg Coastal and Marine Science Center

EAARL Coastal Topography-Cape Hatteras, North Carolina, Pre- and Post-Hurricane Isabel, 2003

These XYZ datasets provide lidar-derived bare-earth topography for Cape Hatteras, North Carolina. Elevation measurements were acquired pre-Hurricane Isabel on September 16 and post-Hurricane Isabel on September 21, 2003 by the first-generation Experimental Advanced Airborne Research Lidar (EAARL), in cooperation with the National Aeronautics and Space Administration (NASA).
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St. Petersburg Coastal and Marine Science Center

Coastal Topography-Long Island, New York, Post-Hurricane Irene, 30 August 2011

Lidar-derived bare-earth topography Digital Elevation Model (DEM) mosaic and classified point-cloud datasets were produced from remotely sensed, geographically referenced elevation measurements collected post-Hurricane Irene on August 30, 2011 for Long Island, New York, using a Leica ALS50-II.
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St. Petersburg Coastal and Marine Science Center

Coastal Topography-Anegada, British Virgin Islands, 2014

These datasets provide lidar-derived topography for Anegada and a portion of the submerged environs. Elevation measurements were acquired on January 21, 2014 by an Optech Orion M300, and on March 19-20, 2014 by the second-generation Experimental Advanced Airborne Research Lidar (EAARL-B). The authors acknowledge Emily Klipp, Chris Pali, Virgil Rabine, Rudy Troche, and Wayne Wright, all formerly o
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St. Petersburg Coastal and Marine Science Center
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A federal-state partnership for mapping Florida's coast and seafloor

The Florida Coastal Mapping Program, a partnership of state and federal agencies, has a goal of having modern, consistent, high- resolution sea-floor data for all of Florida’s coastal zone in the next decade to support a myriad of coastal zone science and management applications. One of the early steps in the implementation process is to prioritize and justify mapping needs. This is accomplished b
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St. Petersburg Coastal and Marine Science Center

Florida Coastal Mapping Program—Overview and 2018 workshop report

The Florida Coastal Mapping Program is a nascent but highly relevant program that has the potential to greatly enhance the “Blue Economy” of Florida by coordinating and facilitating sea-floor mapping efforts and aligning partner and stakeholder activities for increased efficiency and cost reduction. Sustained acquisition of modern coastal mapping information for Florida may improve management of r
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St. Petersburg Coastal and Marine Science Center

EAARL-B coastal topography: Chandeleur Islands, Louisiana, 2012: seamless (bare earth and submerged)

These remotely sensed, geographically referenced elevation measurements of light detection and ranging (lidar)-derived seamless (bare-earth and submerged) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida. This project provides datasets acquired on August 7 and 8, 2012, for a portion of the Chandeleur I
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St. Petersburg Coastal and Marine Science Center

EAARL-B submerged topography: Barnegat Bay, New Jersey, pre-Hurricane Sandy, 2012

These remotely sensed, geographically referenced elevation measurements of lidar-derived submerged topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.   This project provides highly detailed and accurate datasets for part of Barnegat Bay, New Jersey, acquired pre-Hurricane Sandy on October 18, 22, 23, an
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St. Petersburg Coastal and Marine Science Center

EAARL-B coastal topography: Fire Island, New York, pre-Hurricane Sandy, 2012: seamless (bare earth and submerged)

These remotely sensed, geographically referenced elevation measurements of lidar-derived seamless (bare-earth and submerged) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.   This project provides highly detailed and accurate datasets for part of Fire Island, New York, acquired pre-Hurricane Sandy on
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St. Petersburg Coastal and Marine Science Center

EAARL-B submerged topography: Barnegat Bay, New Jersey, post-Hurricane Sandy, 2012-2013

These remotely sensed, geographically referenced elevation measurements of lidar-derived submerged topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida. This project provides highly detailed and accurate datasets for part of Barnegat Bay, New Jersey, acquired post-Hurricane Sandy on November 1, 5, 16, 20,
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St. Petersburg Coastal and Marine Science Center

EAARL-B coastal topography: eastern New Jersey, Hurricane Sandy, 2012: first surface

These remotely sensed, geographically referenced elevation measurements of lidar-derived first-surface (FS) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida. This project provides highly detailed and accurate datasets for a portion of the New Jersey coastline beachface, acquired pre-Hurricane Sandy on
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St. Petersburg Coastal and Marine Science Center

EAARL coastal topography and imagery–Western Louisiana, post-Hurricane Rita, 2005: First surface

These remotely sensed, geographically referenced color-infrared (CIR) imagery and elevation measurements of lidar-derived first-surface (FS) topography datasets were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida, and the National Aeronautics and Space Administration (NASA), Wallops Flight Facility, Virginia. This project p
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St. Petersburg Coastal and Marine Science Center

EAARL coastal topography--North Shore, Lake Pontchartrain, Louisiana, 2010

This DVD contains lidar-derived coastal topography GIS datasets of a portion of the north shore of Lake Pontchartrain, Louisiana. These datasets were acquired on February 28, March 1, and March 5, 2010.
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St. Petersburg Coastal and Marine Science Center

EAARL coastal topography--Central Wetlands, Louisiana, 2010

This DVD contains lidar-derived coastal topography GIS datasets of a portion of the Central Wetlands, Louisiana. These datasets were acquired on March 4 and 5, 2010.
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St. Petersburg Coastal and Marine Science Center

EAARL coastal topography--Alligator Point, Louisiana, 2010

This project provides highly detailed and accurate datasets of a portion of Alligator Point, Louisiana, acquired on March 5 and 6, 2010. The datasets are made available for use as a management tool to research scientists and natural-resource managers. An innovative airborne lidar instrument originally developed at the National Aeronautics and Space Administration (NASA) Wallops Flight Facility, an
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St. Petersburg Coastal and Marine Science Center

EAARL coastal topography-Northern Outer Banks, North Carolina, post-Nor'Ida, 2009

This DVD contains lidar-derived first-surface (FS) and bare-earth (BE) topography GIS datasets of a portion of the northern Outer Banks beachface in North Carolina. These datasets were acquired post-Nor'Ida on November 27 and 29, 2009.
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Natural Hazards, Coastal and Marine Hazards and Resources Program
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USGS staff from across the Coastal and Marine Hazards and Resources Program will present at the virtual Coastal GeoTools conference

Six representatives from the USGS Coastal and Marine Science Centers will present at the upcoming virtual Coastal GeoTools conference February 8–11.

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CMHRP Lidar Coordinator/National Geospatial Program Associate National Map Liaison invited as Keynote speaker for the Management Association for Private Photogrammetric Surveyors 2021 Winter Meeting

Xan Fredericks, Lidar Coordinator for the Coastal and Marine Hazards and Resources Program (CMHRP) and Associate National Map Liaison to Florida...

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Coastal and Marine Hazards and Resources Program Lidar Coordinator/National Geospatial Program Associate National Map Liaison elected to serve on 2020-2023 URISA Board of Directors

Xan Fredericks, Lidar Coordinator for the Coastal and Marine Hazards and Resources Program and Associate National Map Liaison to Florida, Puerto Rico...

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Coastal and Marine Hazards and Resources Program (CMHRP) Lidar Coordinator/National Geospatial Program (NGP) Associate National Map Liaison hosts the first Interagency Working Group on Ocean and Coastal Mapping Meeting of 2020

Xan Fredericks, Lidar Coordinator for the CMHRP and Associate National Map Liaison to Florida, Puerto Rico, and the US Virgin Islands for the NGP...

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Coastal and Marine Hazards and Resources Program (CMHRP) Lidar Coordinator/National Geospatial Program (NGP) Associate National Map Liaison attending Florida Geographic Information Office and Florida GIS Managers Quarterly Meetings

Xan Fredericks, Lidar Coordinator for the CMHRP and Associate National Map Liaison to Florida, Puerto Rico, and the US Virgin Islands for the NGP, is...

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Coastal and Marine Hazards and Resources Program Lidar Coordinator/National Geospatial Program Associate National Map Liaison invited as Keynote Speaker at the 1st Annual GeoFlo Summit 2019

Xan Fredericks, Lidar Coordinator for the CMHRP and the NGP Associate National Map Liaison to Florida, Puerto Rico, and the US Virgin Islands, has...

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Coastal and Marine Hazards and Resources Program (CMHRP) Lidar Coordinator/National Geospatial Program (NGP) Associate National Map Liaison presenting and moderating at the URISA GIS-Pro 2019 Conference

Xan Fredericks, Lidar Coordinator for the CMHRP and Associate National Map Liaison to Florida, Puerto Rico, and the US Virgin Islands for the NGP, is...

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Coastal and Marine Hazards and Resources Program (CMHRP) Lidar Coordinator/National Geospatial Program (NGP) Associate National Map Liaison invited as Keynote Speaker at the 2019 Central Florida Geographic Information System (GIS) Workshop

Xan Fredericks, Lidar Coordinator for the CMHRP and Associate National Map Liaison to Florida, Puerto Rico, and the US Virgin Islands for the NGP, has...

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CMHRP Lidar Coordinator and FCMaP Co-Chair will co-host and present at the 2019 Panhandle of Florida Seafloor Mapping Prioritization Workshop 

Xan Fredericks, Lidar Coordinator for the Coastal and Marine Hazards and Resources Program and the USGS Co-Chair for the Florida Coastal Mapping...

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CMHRP Lidar Coordinator/NGP Associate National Map Liaison invited as Keynote Speaker at the 2019 South Florida GIS Expo

Xan Fredericks, Lidar Coordinator for the Coastal-Marine Hazards and Resources Program and Associate National Map Liaison to Florida, Puerto Rico, and...

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CMHRP Lidar Coordinator/NGP Geospatial Information Response Team member provided GIS tool demonstration to Mississippi River Cities & Towns Initiative (MRCTI) Mayors

Xan Fredericks, Lidar Coordinator for the Coastal/Marine Hazards and Resources Program and member of the National Geospatial Program's Geospatial...

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CMHRP Lidar Coordinator/USGS Co-Chair of Florida Coastal Mapping Program to co-host the 2019 Northeast Florida Seafloor Mapping Prioritization Workshop

Xan Fredericks, Lidar Coordinator for the Coastal and Marine Hazards and Resources Program and the USGS Co-Chair for the Florida Coastal Mapping...

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Science and Products