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The Elevation Contours tile cache service displays at large scales contour lines at 3-meter intervals created from <a href='http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/dtm.html'>Digital Terrain Model (DTM)</a> data points collected during the production of the <a href='http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/oqdesc.html'>1:5,000 Black and White Digital Orthophoto images</a>. See <a href='http://www.mass.gov/itd/hp5k' target='_blank'>http://www.mass.gov/itd/hp5k</a> for more details.<br /><br />At
 smaller scales the service displays contour lines at 30-foot intervals 
originally developed at a scale of 1:250,000 and distributed by the U.S.
 Geological Survey. Please see <a href='http://www.mass.gov/itd/hp250k' target='_blank'>http://www.mass.gov/itd/hp250k</a> for more details.<br /><br />For both datasets, the index contours are labeled in feet above sea level.
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{'title': 'Elevation Contours (Cache)', 'author': 'MassGIS', 'comments': '', 'subject': 'Elevation contour lines labeled in feet above sea level', 'category': '', 'keywords': 'MassGIS, Elevation, Contours', 'credits': 'MassGIS', 'Title': '', 'Author': '', 'Comments': '', 'Subject': '', 'Category': '', 'AntialiasingMode': 'Best', 'TextAntialiasingMode': 'Force', 'Keywords': ''}
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