Maps and tools

abstract map of East Multnomah

This section contains links to useful mapping tools, including maps specific to our District, as well as useful online tools.



  • EPA National Stormwater Calculator – This incredibly useful tool from the EPA allows you to find out how much rainfall, stormwater runoff and soil drainage to expect on your property. You can even enter information on how you are managing stormwater on your site (or plan to), including such controls as rain gardens, porous pavement and green roofs!
  • National Tree Benefit Calculator – use this calculator to estimate the benefits street-side trees provide, to get an understanding of the environmental and economic value your trees provide on an annual basis.
  • Fieldprint Calculator – “a free and confidential tool…allows growers to better understand and communicate how management choices affect overall sustainability performance and operational efficiency.” This tool can calculate irrigation water use, water quality and soil carbon, among other factors.