kernelDensity http://3dgis.supermap.jp/iserver/services/spatialAnalysis-PortGeoDB/restjsr/spatialanalyst/datasets/%E9%83%BD%E6%B8%AF%E6%B9%BE%E5%B1%80@%E5%9C%B0%E7%9B%A4%E6%83%85%E5%A0%B1/densityanalyst/kernel