building.mapcss

area[building]:closed {
    color: lightgreen;
    width: 3;
    small_area : true;
	font-size: 13;
	font-weight: bold;
	text-color: lightgreen;
	text-position: center;
	text: "source";
	
}

node {
	symbol-shape: square;
	symbol-size: 8;
}

area|z17-[building]["ref:ruian:building"], area|z17-[building:part]["ref:ruian:building"]
{
        color: greenyellow;
		text-color: greenyellow;
		width: 4;
		font-size: 14;
		z-index: 1;
		fill-opacity: 0.03;

}

area|z17-[building]["building:levels"], area|z17-[building:part]["building:levels"]
{
        color: greenyellow;
		text-color: greenyellow;
		z-index: 1;
        fill-opacity: 0.03; /* let the background, i.e. the roof, be recognizable */
        width: 4; /* any building WITH a building:levels tag (except for garages) gets a 5 pixel thick outline ... */
        /* text-halo-radius: 2; */  
        /* ... as well as a text tag giving the house number as well as the number of building:levels and roof:levels (and roof height in brackets): */
        text: eval(concat( tag(source) ,": BL", tag("building:levels"), "-RL/H", cond(has_tag_key("roof:levels"), tag("roof:levels"), "") ,   cond(has_tag_key("roof:height"), concat("(",tag("roof:height"),"m)"), "")  )) ; 
        font-size: 14;
        font-weight: bold;
}