The ArcGIS Botanical Garden & Zoological Park Data Model is an evolving free and open source geographic information system (GIS) template for implementing GIS projects at botanical gardens, zoos, and similar public landscapes that is designed for Environmental Systems Research Institute’s (ESRI) ArcGIS software. The data model is being designed by a consortium of domain specialists from the botanical garden and zoological park community called the Alliance for Public Gardens GIS (APGG) that is led by the UC Davis Arboretum in an effort to provide institutions of all sizes and funding levels an effective means of achieving a return on investment with GIS.