kernelDensity http://3dgis.supermap.jp/iserver/services/spatialAnalysis-PortGeoDB/restjsr/spatialanalyst/datasets/%E9%98%B2%E6%BD%AE%E5%A0%A4%E6%A8%99%E9%AB%98%E3%83%87%E3%83%BC%E3%82%BF@H24%E6%B8%AC%E9%87%8F/densityanalyst/kernel