Purpose:
Massachusetts Beach extent data for BEACH Act, as administered by the US E.P.A.
Data collection: 7/20/2003 - 10/20/2003
Publication: 10/31/2003
Massachusetts Beach Length lines produced by the Massachusetts Department of Public Health, Bureau of Environmental Health Assessment, in conjunction with the MDPH/Division of Community Sanitation.
Point data were collected in the field by MDPH beach inspectors using global positioning system (GPS) units. To aid in locating the points, the inspectors used as reference MassGIS black and white and color ortho images, street maps, and sandy coastline maps produced by Applied Geographics, Inc. These coastline maps had previously been mailed to local boards of health and state agencies for mark-up of appropriate beach boundary and sampling locations.
The beach points (based on GPS) are accurate to within 10 meters.
Boundary points were then used to manually delineate beach extent lines in ESRI's ArcMap software.
Supplemental_Information:
Created by MDPH/BEHA 10/31/2003
Source Info
Citation: "GPS"
Originator: Massachusetts Department of Public Health Bureau of Environmental Health Assessment and Massachusetts Department of Public Health Division of Community Sanitation
Description: Used GPS points boundaries as guides to creat beach lines
Currentness: 2003
Media: Digital
Created: 7/20/2003 - 10/20/2003
% Contribution 50%
Citation: Black and White Ortho Photos
Originator: MassGIS
Description: Used ortho photos to help identify coast line in Arcmap
Currentness: 1994 - 1999
Media: Digital
Created: 1994 - 1999 fly overs
% Contribution: 23%
Citation: Color Ortho Photos
Originator: MassGIS
Description: Used ortho photos to help identify coast line in Arcmap
Currentness: 2001
Media: Digital
Created: 2001 fly overs
% Contribution: 23%
Citation: USGS Topo Maps
Originators: USGS, MassGIS
Description: Used topo maps to verify some beach locations in Arcmap
Currentness: 1972 - 1985
Media: Digital
Created: 1972 - 1985 USGS paper topo maps scanned in and made digital by MassGIS
% Contribution: 2%
Citation: Geographic Data Technology Streets
Originators: Geographic Data Technology
Description: Used GDT streets to verify some beach locations in Arcmap
Currentness: 2001
Media: Digital
Created: 2001 enhancement of 2000 Census tiger line files by GDT
% Contribution: 2%