Coastal bathymetry data at Rapa Nui (Easter Island, Chile)

This archive contains files and bathymetry data from Rapa Nui (Easter Island, Chile), originating from echosounder data gathered in November 2022 and 2025. Depth was measured using a Biosonics MX echosounder [1], and surveys mostly focused on shallow depths (above 30m depth). This archive also contains extracts from GEBCO [2], Copernicus COP 30 [3], and nautical maps from SHOA [4], which are used to krige an interpolated bathymetry map at 30x30 m resolution. R code is provided to replicate the interpolation. List of files ALL_DEPTHS.rds and ALL_DEPTHS.tsv Echosounder data as an R data file containing a data frame, or as tab-delimited text data, with columns: data_file the original data file; local_time the local time of the record; utcsec the number of seconds since UNIX Epoch of the record (in UTC time); gps_quality The quality of the gps record (lower is better); lat, lon, UTM_X, UTM_Y coordinates of the record in WGS84 lon/lat (EPSG 4326) or UTM12S (EPSG 32712), respectively; bottom_depth The recorded depth, in meters gebco_2025_n-25.0_s-29.0_w-112.0_e-107.0.tif GEBCO Data extract for the area, used for kriging bathymetry output_COP30.tif The Copernicus COP30 dataset extract used for kriging bathymetry rapa_polygon.sqlite an sqlite database containing polygon data for Rapa Nui mainland and islets output/input_dataset.gpkg A geopackage data file containing all data points used for depth kriging output/rapa_coastal_bathymetry_rast.tiff A single band geoTIFF containing interpolated depth data at a 30x30m resolution (UTM12S; EPSG 32712) kriging_bathymetry.R, swissknife.R two R script files containing the code used to interpolate the bathymetry data pretty_export/export.png A rendering of the depth data export_version.txt The export version number LICENSE The license applicable to this dataset (CC0) License and disclaimer The echousounder data provided in this archive is provided under a CC0 License, available at https://creativecommons.org/publicdomain/zero/1.0/ and distributed in this archive in the LICENSE file. ALL DATA ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND. IN NO EVENT THE AUTHORS CAN BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE DATASET (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES). Funding and partners This work was developed with local Rapa Nui partner Freddy Hereveri Tuki and in joint collaboration with Cristian Rapu Edmunds and Loti Garcia Haoa. Echosounder sampling was coordinated by Evie Wieters (Estacion Costera de Investigaciones Marinas, PUC, Chile) and Alexandre Genin (LISC, INRAE, France), with assistance from N. Riquelme, B. Salgado-Murillo, C. Montt Montecinos, F. Fuentes Campos. Freddy Hereveri provided feedback and co-designed the field sampling platform, while technical support and boat operations were provided by Freddy, Crisitian and Loti (ORCA dive center). Data analyses were conducted by Alexandre Genin. COP30 data were produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved GEBCO data are produced by the International Hydrographic Organization and UNESCO (https://www.gebco.net/). Funding This work was supported by the Chilean grant Fondecyt #124190 to EAW, and has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement N°896159. [1] https://www.biosonicsinc.com/products/mx-aquatic-habitat-echosounder/ [2] https://www.gebco.net/ [3] https://dataspace.copernicus.eu/explore-data/data-collections/copernicus-contributing-missions/collections-description/COP-DEM [4] https://www.shoa.cl/php/index.php