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Josh Logan Wins Award at USGS-GIS Conference

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Congratulations to Joshua Logan of the USGS Pacific Science Center in Santa Cruz, CA, for receiving the award for "Best Analytical Poster" at the recent USGS-GIS 2001 Conference. The conference was held April 23rd-27th in the Denver Federal Center and brought together scientists and computer technicians from across the USGS.

Josh is an Environmental Careers Organization (ECO) intern working with the Coral Reef Project in Santa Cruz. His poster, co-authored by Curt Storlazzi and Mike Field, was entitled "Analysis of Coral Reef Morphology Using SHOALS LIDAR Data: Southern Moloka'i, Hawai'i." SHOALS (Scanning Hydrographic Operational Lidar [Light Detection and Ranging] Survey) imagery provides precise depth measurements to +/- 15 cm. By constructing digital profiles across selected bathymetric contours, Josh was able to identify characteristic trends in spur-and-groove morphology (spurs are ridges of coral perpendicular to the shore; grooves are channels between the spurs.) Co-author Curt Storlazzi analyzed the power spectra of the morphology through a Matlab application. Together, Josh and Curt have developed a new and potentially powerful application for understanding reef growth.

3-D perspective view of a portion of coral reef off the coast of the Hawai'ian island of Moloka'i
Seeing "The Pit:" 3-D perspective view of "The Pit" area of the Moloka'i fringing coral reef, with profile lines draped over the surface to highlight spur-and-groove morphology. This image was created by draping a color shaded-relief map over a DEM (digital elevation model) derived from the SHOALS LIDAR data. The origin of The Pit is currently unknown. It could be a result of dredging, or it could be a natural feature-a hole maintained by continual freshwater discharge, the remnant of an ancient stream channel cut into the reef when sea level was lower and now overgrown, or a combination of the two.

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Great Blue Hole of Belize

Channel Islands Cruise

Lake Mead Mapping

Research New Underwater Microscope System

Hurricane Display

Outreach Reston Open House

WHFC Outreach

Monterey Open House

School-to-Work Partnership

Acadiana Migratory Bird Day

Meetings SWICA-M³

Global Assessment of Geologically-Sourced Methane

Methane Hydrates

Metadata Workshop

Awards Sue Hunt—Recycling

Coastal Stewardship

GIS 2001: Logan

GIS 2001: Massachusetts Bay

Staff & Center News WHFC Visitors

Publications Northeast Earthquake Hazards Map

June Publications List

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