• (美国地理调查资料下载)
  USGS - http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html
• (联邦救灾管理署)
  FEMA - http://www.fema.gov/
• (国家湿地名录)
  National Wetlands Inventory - http://www.nwi.fws.gov/
• (美国农业部土壤调查手册)
  USDA- Soil Survey Manual - http://www.statlab.iastate.edu/soils/

州政府
State

• (麻萨诸塞州首府特区(议会)
  Metropolitan District Commission- http://www.state.ma.us/mdc/mdc_home.htm
• (麻州地理资讯系统数位空照图)
  Mass GIS - Aerial Photos- http://ortho.mit.edu/nsdi/
• (麻州地理资讯系统数位地图)(须以GIS软件浏览)
  Mass GIS - Shape Files (Need GIS Software to view) - http://www.magnet.state.ma.us/mgis/

剑桥市
City of Cambridge

• (剑桥市政府社区发展部环境与交通规划课)
  Community Development Department Environmental & Transportation Planning - http://www.ci.cambridge.ma.us/~CDD/envirotrans/
• (剑桥市政府社区发展部社区规划课)
  Green Ribbon Committee - http://www.ci.cambridge.ma.us/~CDD/commplan/
• (地理资讯系统数据库)
  GIS Database - http://www.ci.cambridge.ma.us/~GIS/

地方组织
Organizations

• (查尔斯河湿地协会)
  The Charles River Watershed Association - http://www.crwa.org/