10.6084/m9.figshare.11941224.v1 Dani Arribas-bel Dani Arribas-bel CLIWOC Slim and Routes figshare 2020 web mapping climate history Geovisualisation Geography Climate Science History 2020-03-06 20:02:26 Dataset https://figshare.com/articles/dataset/CLIWOC_Slim_and_Routes/11941224 <div><div> <p>This data package contains two derivatives of the original CLIWOC data product that make using it for visualisation and teaching purposes more convenient. The derivatives are the following:</p> <ul><li><code>cliwoc_slim</code>: a version of CLIWOC 2.1 including only records with a longitude and latitude, a subset of the full variable list (<code>YR</code>, <code>MO</code>, <code>DY</code>, <code>HR</code>, <code>latitude</code>, <code>longitude</code>, <code>ID</code>, <code>C1</code>), and two additional columns, <code>date</code> with a processed date (<code>YR-MO-DY</code>), and <code>dys_since_start</code> with the count of days elapsed since the first record. The resulting file has a substantially smaller footprint.</li><li><code>cliwoc_routes</code>: a transformation of individual logs by the same ship into a single linestring or route. Crossings of longitude -180/180 are dealt with. In addition to the geometries, start date (<code>start</code>), end date (<code>end</code>), count of records (<code>records</code>), country (<code>C1</code>), and length of the route in days (<code>length_days</code>) are included.</li></ul> <p><strong>NOTE</strong>: this product is not intended for climatological or historical research as it makes certain assumptions that favor visualisation. For those goals, the original CLIWOC package is preferred.</p> <h2>Original Sources</h2> <ul><li>The original CLIWOC database was the result of a EU-funded project. Main website available at: <a href="https://webs.ucm.es/info/cliwoc/" rel="noopener" target="_blank">https://webs.ucm.es/info/cliwoc/</a></li><li>The input data to create these derivatives comes from the "HistoricalClimatology.com" team. The link for the <a href="https://www.historicalclimatology.com/uploads/4/5/1/4/4514421/cliwoc21.gpkg" rel="noopener" target="_blank">input data file in geopackage format</a> is available at: <a href="https://www.historicalclimatology.com/cliwoc.html#" rel="noopener" target="_blank">https://www.historicalclimatology.com/cliwoc.html#</a></li><li>To process the data, these notes by Steven Ottens were most useful: <a href="https://stvno.github.io/page/cliwoc/" rel="noopener" target="_blank">https://stvno.github.io/page/cliwoc/</a></li></ul> <h2>Contents</h2> <p>This data package includes the following files:</p> <ul><li><code>cliwoc_slim.geopackage/mbtiles</code>: Geopackage and vector tileset versions of the <code>cliwoc_slim</code> table, expressed in lon/lat (<code>EPSG:4326</code>).</li><li><code>cliwoc_routes.geopackage/mbtiles</code>: Geopackage and vector tileset versions of the <code>cliwoc_routes</code> table, expressed in lon/lat (<code>EPSG:4326</code>).</li><li><code>cliwoc_process.ipynb</code>: Jupyter Notebook with code required to create both tables in each file format.</li><li><code>README.md</code>: documentation file.</li></ul> <h2>Computational Platform</h2> <p>The code in <code>cliwoc_process.ipynb</code> can be run using the <a href="https://github.com/darribas/gds_env" rel="noopener" target="_blank"><code>darribas/gds:4.0</code></a> Docker container with <a href="https://github.com/mapbox/tippecanoe" rel="noopener" target="_blank"><code>tippecanoe</code></a> installed to create vector tilesets.</p> </div></div>