- The U.S. Geological Survey (USGS) distributes Digital Line Graphs (DLG) from its 1:100,000-scale maps showing pipelines, transmission lines, and other miscellaneous transportation features. MassGIS assembled these data into a statewide layer consisting of all the transportation features identified by USGS other than railroads and vehicle roadways and which appear on the 1:100,000 USGS quadrangle sheets. Although the pipelines and transmission lines appear on maps, they are not necessarily in active use. The linework is generally excellent, although MassGIS has noted that some lines are discontinuous (not perfectly edgematched) at USGS 1:100,000 quadrangle boundaries. Railroad transporation features are included in the TRAINS coverage. The layer is named TRANSLINES_ARC in ArcSDE.
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