Shoreline survey data collected at Hobuck, Tsoo-Yess, and Ozette, on Makah Tribal Lands, 2018–2022

Survey grade location and elevation data were collected on three beaches
on the Makah Tribe's lands on the northwest tip of the Olympic
Peninsula between 2018 and 2022 for the purpose of evaluating trends and
patterns in shoreline morphology. Data were collected with an RTK-DGPS
system, connected to the Washington State Virtual Reference Network and
providing sub-decimeter vertical precision, along cross-shore oriented
transects on Hobuck, Tsoo-Yess beaches, and on the shoreline fringing the
Ozette reservation. During some surveys, oblique photos of the shoreline
were also collected, frequently from near the average low tide elevation
looking landward, but in some cases, from other elevations or with other
perspectives of the beach.  Text files for each survey date are
provided here, containing all points collected during the survey.
Horizontal positions are provided in latitude and longitude, referenced to
NAD83(2011), and the vertical data are referenced to meters relative to
NAVD88(Geoid18). All survey data were collected either with the GNSS
system mounted on a 2.05 m rover pole, held level as a transect line was
traced in a cross-shore orientation on the beach, or with the system
mounted on a survey backpack.   The associated text
files include the horizontal (HRMS) and vertical (VRMS) root-mean-square
errors estimated by the GNSS system, the date and time of collection
(referenced to local Pacific time), as well as the RTK-DGPS status
reported by the GNSS system at the time each point was collected. The
description assigned to each point at the time of collection is also
provided. Most data in these files are intended to be used to calculate
beach profiles and assigned a "topo" designator in the text
file, but other data descriptions were assigned in some cases, notably the
location and number of large pieces of wood intersecting a profile, the
first occurrence of vegetation on a profile, the first occurrence of dense
vegetation on a profile, or in some instances the location of storm wrack
lines observed during surveys.