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New Maps for New England



New Maps for New England

Connecticut, Rhode Island, Massachusetts, New Hampshire and Vermont join the more than 43 states covered by the US Topo.  

To keep pace with the growing demand for the latest map coverage of the United States, the U.S. Geological Survey (USGS) has been building a national map series named the US Topo. Nearly 690 revised digital maps covering Connecticut, Rhode Island, Massachusetts, New Hampshire and Vermont have been added to approximately 51,000 maps currently covering the lower 48 states and are available for free download from the website.

“Whether you are a New England resident looking for the bird’s eye view of the contours of your environment or an outdoor enthusiast seeking to explore the Northeast’s stunning countryside and mountain landscape, the availability of these new maps is terrific news,” said USGS Director Marcia McNutt. “Not only are they easily downloaded from the convenience of your home computer, but at ‘free’, the price is right!”

New feature additions and improvements on the updated US Topo maps include:

  • Contours
  • Rivers, lakes steams and other hydrography
  • Woodland tint derived from the National Land Cover Dataset
  • Fire Stations
  • Hospitals
  • State and County boundaries
  • Forest service boundaries  
  • Commercial roads in lieu of Census roads
  • Forest Service roads and road numbers   

US Topos are derived from key layers of geographic data found in The National Map which delivers visible content such as high resolution aerial photography, which was not available on older paper-based topographic maps. The US Topo also provides modern technical advantages over the original lithographic map as it supports wider and faster public distribution and enables on-screen geographic analysis for users. 

Future enhancements to the US Topo are scheduled to include additional functional capabilities and content, such as a shaded relief layer, Public Land Survey System (PLSS) data, updated structures, enhanced transportation, additional federal boundaries, and Forest Service trails. The USGS expects to produce more than 18,500 revised quadrangles annually, which means each US Topo map is updated every three years in a cyclic fashion. 

The new digital electronic topographic maps for these New England states– along with 43 other completed states – are now available for free download from the USGS Store. The quadrangles are delivered in GeoPDF format and may be viewed using Adobe Reader software, also available as a no cost download. 

For more information, visit the National Map, US Topo website.

USGS Newsroom



More information

Parameter Value Description
Magnitude mb The magnitude for the event.
Longitude ° East Decimal degrees longitude. Negative values for western longitudes.
Latitude ° North Decimal degrees latitude. Negative values for southern latitudes.
Depth km Depth of the event in kilometers.
Place Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 1970-01-01 00:00:00 Time when the event occurred. UTC/GMT
Updated 1970-01-01 00:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status Indicates whether the event has been reviewed by a human.
Tsunami This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG A number describing how significant the event is. Larger numbers indicate a more significant event.
Network The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type The method or algorithm used to calculate the preferred magnitude for the event.
Event Type Type of seismic event.
Event ID Id of event.
Event Code An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS A comma-separated list of event ids that are associated to an event.

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