Render outline for no-data on date

tileserver/index.js

@@ -130,8 +130,6 @@ app.get('/date_year/:z/:x/:y.png', function(req, res) {
             buildings as b
         WHERE 
             g.geometry_id = b.geometry_id
-        AND
-            b.building_doc ? 'date_year'
     ) as outline`
     const style_def = ['date_year']
     render_tile(bbox, table_def, style_def, function(err, im) {

tileserver/map_styles/polygon.xml

@@ -112,5 +112,10 @@
           <PolygonSymbolizer fill="#4c0073" />
           <LineSymbolizer stroke="white" stroke-width="0.3" />
       </Rule>
+      <Rule>
+          <ElseFilter />
+          <PolygonSymbolizer fill="#00000000" />
+          <LineSymbolizer stroke="black" stroke-width="0.3" />
+      </Rule>
   </Style>
 </Map>