Discrete Land-Water Tiles Dataset

<p>A quad-tree based&nbsp;dataset of land and water tiles with world-wide coverage in WGS84 coordinate system (EPSG:4326) and a resolution of up to quad-level 18 (~150m height and width at the equator). This data separates the world into land and water tiles with any 4-tuple of tiles of&nbsp;the same classification value being recursively aggregated into their respective larger parent&nbsp;tiles. E.g. the quadkeys &quot;3120&quot;, &quot;3121&quot;, &quot;3122&quot;, &quot;3123&quot; are aggregated into &quot;312&quot; if (and only if)&nbsp;they all share the same classification and would again be aggregated into&nbsp;&nbsp;&quot;31&quot; if &quot;310&quot;, &quot;311&quot; and &quot;313&quot; also share that classification.</p> <p>The dataset is provided as a comma separated value (CSV) file and a spatialite database file with roughly 133 million entries and&nbsp;consists of the following fields:</p> <p>-&nbsp;classification - classification of tiles into land (0) or water (5)<br> -&nbsp;quadkey - the unique identifying quadkey of a tile<br> - size_tile_area_aea - the tile size in meter in Albers Equal Area (AEA) projection<br> - size_land_area_aea - the size of the land parts of a tile in AEA projection (only in coastal tiles)<br> - size_water_area_aea - the size of the water parts of a tile in AEA projection (only in coastal tiles)<br> - geometry - the tile geometry in EPSG:4326<br> - land_area - the land polygon&nbsp;geometry in EPS:4326 (only in coastal tiles)<br> - water_area - the water polygon geometry in EPSG:4326 (only in coastal tiles)</p>