11 Askevold, R. A. Whipple, A. Grossinger, R. M. Stanford, B. Salomon, M .N. 2011 GIS data produced for the East Contra Costa County Historical Ecology Study. HE GIS data is in file geodatabase (.gdb) format for ESRI ArcGIS 10 Google Earth (KML) format is also available http://www.sfei.org/HEEastContraCosta