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<h1>Water <img src="http://wiki.thinkgeo.com/wiki/_media/water_polygon.png?w=18&h=18&t=1546847374&tok=ad7996" /></h1>
<h3>buffer: 12.5%, Zoom level: 0 ~ 14 </h3>

Representing the lake and river.Water areas are filtered and simplied acoording to scalerank and osm_area. At lowest zoom levels, it just has big lakes and give rivers.When you zoom in, more small water area should show up.
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{{:vectortile:schema:v2:water_v2.png}}


===== Columns =====

==== class ====
 A category of waters, so that you can easily track a specific water object. 


^Value (class)	    ^Description^.|
|ocean  |Areas for aerodrome,apron,heliport,helipad and runway.|
|bathymetry	|Aboriginal Areas, such as farmland,orchard,plant_nursery, or vineyard.|
|lake	    |Areas for cemeteries or graveyards.|
|river	    |Plant or animal product growing.|
|pond	    |hospital, nursing_home, social_facility, nursing_home, doctors grounds.|
|pool	    |Areas for college,kindergarten,school and university.|
|reservoir  |Grassland, meadow, or the grass areas with grasses(Poaceae) and other herbaceous(non-woody) plants growing.|
|basin	    |Glaciers or permanent ice/snow there.|
|canal	        |National parks, nature reserves, city parks, village greens, summer_camp,  playgrounds etc.|
|lock	        |Bare_rock, scree，shingle, quarry, bare_rock or gravel.|
|others	    |Scrub, heath or bushes.|
|swimming_pool	        |Sand, beach or loam.|

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