Using TileMill

TileMill Targeting 10mpopulatedplaces data

/**********************************************************
 * Control Room
 **********************************************************/

@base: #0f1b38;

Map { background-color:@base; }

.water-poly { polygon-fill:@base; }

#land::glow-inner[zoom>0] {
  line-color:#225160;
  line-width:1.2;
  line-join:round;
  line-opacity:0.4;
}
#land::glow-innermiddle[zoom>1] {
  line-color:#225160;
  line-width:2.5;
  line-join:round;
  line-opacity:0.2;
}
#land::glow-outermiddle[zoom>2] {
  line-color:#225160;
  line-width:5;
  line-join:round;
  line-opacity:0.1;
}
#land::glow-outer[zoom>3] {
  line-color:#225160;
  line-width:5;
  line-join:round;
  line-opacity:0.05;
}

#land[zoom>=0] {
  polygon-fill:#32345c;
  polygon-gamma:0.7;
}

#international_boundaries[zoom>1] {
  line-color:#0AF;
  line-dasharray:1,1;
  line-width:0.5;
  [zoom=4] { line-width:0.6; }
  [zoom=5] { line-width:0.8; }
  [zoom=6] { line-width:1; }
  [zoom=7] { line-width:1.2; }
  [zoom=8] { line-width:1.4; }
  [zoom>8] { line-width:1.6; }
}



#subnational_boundaries[COUNTRYNAM='US'][zoom=4],
#subnational_boundaries[COUNTRYNAM='Canada'][zoom=4],
#subnational_boundaries[COUNTRYNAM='Australia'][zoom=4],
#map-units[zoom>4],
#subnational_boundaries[zoom>4] {
  line-color:#0AF;
  line-dasharray:4,2;
  line-opacity:0.2;
  line-width:0.4;
  [zoom=5] { line-width:0.5; }
  [zoom=6] { line-width:0.6; }
  [zoom=7] { line-width:0.8; }
  [zoom=8] { line-width:1.0; }
  [zoom>8] { line-width:1.2; }
}

#geo-lines[ScaleRank<10] {
  line-color:#B2A;
  line-dasharray:1,4;
  line-opacity:0.8;
  line-width:0.25;
  line-gamma:0.2;
}

#urban {
  polygon-fill:#9F6;
  polygon-opacity:0.66;
  line-color:#9F6;
  line-opacity:0.33;
  [zoom=3] { line-width:0.4; }
  [zoom=4] { line-width:0.6; }
  [zoom=5] { line-width:0.8; }
  [zoom=6] { line-width:1; }
  [zoom>6] { line-width:1.2; }
}

#10mpopulatedplaces {
  [POP_MIN >= 1000] { marker-width:.6; }
  [POP_MIN >= 10000]   { marker-width:.8; }
  [POP_MIN >= 15000] { marker-width:.10; }
  [POP_MIN >= 25000]   { marker-width:.12; }
  [POP_MIN >= 50000] { marker-width:.14; }
  [POP_MIN >= 200000]   { marker-width:50; marker-opacity: 0.3; marker-line-width:.50;}
  [POP_MIN >= 1200000] { marker-width:100;marker-opacity: 0.4; marker-line-width:1.0; }
  [POP_MIN >= 4000000]   { marker-width:200; marker-opacity: 0.5; marker-line-width:1.00;}
  [POP_MIN >= 6000000]   { marker-width:600; marker-opacity: 0.3; }
  [POP_MIN >= 16000000]   { marker-width:400; marker-opacity: 0.1; }
  [POP_MIN >= 36000000]   { marker-width:300; marker-opacity: 0.5; }
  [POP_MIN >= 50000000]   { marker-width:600; marker-opacity: 0.8; }
  [POP_MIN >= 70000000]   { marker-width:200; marker-opacity: 0.3; marker-line-width:.1;}
  [POP_MIN >= 10000000]   { marker-width:400; marker-opacity: 0.9; marker-line-width:1;}
  [POP_MIN >= 50000000]   { marker-width:700; marker-opacity: 0.5; marker-line-width:.3;}
  }


#10mpopulatedplaces {
  [ADM0NAME='Mexico'] { marker-width:1; }
   [ADM0NAME='China'] { marker-width:1; }
  [ADM0NAME='India'] { marker-width:.1; }
  [ADM0NAME='Brazil'] { marker-width:1; }
  }

#10mpopulatedplaces::glow-outer[zoom>3] {
  line-color:#225160;
  line-width:5;
  line-join:round;
  line-opacity:0.5;
}

#10mpopulatedplaces::glow-inner[zoom>0] {
  line-color:#225160;
  line-width:1.2;
  line-join:round;
  line-opacity:0.4;
}
#10mpopulatedplaces::glow-innermiddle[zoom>1] {
  line-color:#225160;
  line-width:2.5;
  line-join:round;
  line-opacity:0.2;
}
#10mpopulatedplaces::glow-outermiddle[zoom>2] {
  line-color:#225160;
  line-width:5;
  line-join:round;
  line-opacity:0.1;
}
#10mpopulatedplaces::glow-outer[zoom>3] {
  line-color:#225160;
  line-width:5;
  line-join:round;
  line-opacity:0.5;
}
#10mpopulatedplaces {
  marker-width:1;
  marker-fill-opacity: 0;
  marker-line-color:#ec9a14;
  marker-allow-overlap:true;
}