Differences

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+<html>
+<h1>Building <img src="http://wiki.thinkgeo.com/wiki/_media/water_polygon.png?w=18&h=18&t=1546847374&tok=ad7996" /></h1>
+</html>
+{{:building.png}}
+==== Zoom Level Applied: 14~19 ====
+All buildings are from OSM. The definition of buildings are wide and includes not only buildings considered by strict definition, but also static caravans, houseboat and some storage tank.
+===== Columns =====
+==== geometry field ====
+''geometry'' type : polygon
+==== class ====
+The main field used for styling the building is ''class''.
+^Value	          ^Description^
+|'' 'building' '' |objects considered as buildings, static caravans, houseboat, .etc|
+===== Data Download Source =====
+^Zoom Level ^Possible Values ^Data Download Source^
+|14 ~ 19    |class=building  |building <> 'no' And ''|