kernelDensity http://3dgis.supermap.jp/iserver/services/spatialAnalysis-PortGeoDB/restjsr/spatialanalyst/datasets/DTH%E8%B2%AB%E5%85%A5%E8%A9%A6%E9%A8%93@%E3%83%9C%E3%83%BC%E3%83%AA%E3%83%B3%E3%82%B0/densityanalyst/kernel