added bootstrap buildings

scripts/osm2pgsql_buildings.lua

@@ -1,6 +1,6 @@
 local buildings = osm2pgsql.define_area_table('buildings', {
   { column = 'osm_id', type = 'bigint', not_null = true },
-  { column = 'geom', type = 'multipolygon', projection = 4326, not_null = true },
+  { column = 'geom', type = 'geometry', projection = 4326, not_null = true },
   { column = 'height_m', type = 'real', not_null = true },
   { column = 'levels', type = 'int' },
   { column = 'building_type', type = 'text' },
@@ -52,6 +52,7 @@ local function add_building(object, geom)
   end
 
   local height_m, levels, source = building_height(object.tags)
+  local ok, err = pcall(function()
     buildings:add_row({
       osm_id = object.id,
       geom = geom,
@@ -60,16 +61,21 @@ local function add_building(object, geom)
       building_type = object.tags.building,
       source = source,
     })
+  end)
+
+  if not ok then
+    print('skip building ' .. tostring(object.id) .. ': ' .. tostring(err))
+  end
 end
 
 function osm2pgsql.process_way(object)
   if object.is_closed then
-    add_building(object, object:as_multipolygon())
+    add_building(object, object:as_polygon())
   end
 end
 
 function osm2pgsql.process_relation(object)
-  if object.tags.type == 'multipolygon' or object.tags.type == 'boundary' then
+  if object.tags.type == 'multipolygon' then
     add_building(object, object:as_multipolygon())
   end
 end