Online link | https://geo-nsdi.er.usgs.gov/metadata/map-i/2737/metadata.faq.html |
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Description | The data are those used to make a large-format, colored map of earthquakes in the northeastern United States and adjacent parts of Canada and the Atlantic Ocean (Wheeler, 2000; Wheeler and others, 2001; references in Data_Quality_Information, Lineage). Th |
Originators | Wheeler, Russell L. |
>Attribute items are in ARC/INFO feature class format. Additional >items that were added to the data are: > >POLYGON > >attribute description >========= =========== >acc_val Acceleration value in percent of gravity of the > polygon. The polygon represents the range of > acceleration values that are contained within its > borders. The polygon is assigned the lowest value > allowed within the polygon's borders. The range of > values allowed within a polygon is controlled by the > contours. Valid values are: 0,2,4,6,8,10,12,14,16,18, > 20,30,40,50,60,80,120,160,200 > >valley A topological indicator that tells whether the area > contained within the polygon is a local minima (valley) > or not. A value of "1" indicates the area is a local > minima. >LINE > >attribute description >========= =========== >acc_val Acceleration value in percent of gravity that the > contour represents. Valid values are: 0,2,4,6,8,10,12, > 14,16,18,20,30,40,50,60,80,120,160,200 > >valley A topological indicator that tells whether the area > contained within the contour is a local minima (valley) > or not. A value of "1" indicates the area is a local > minima.
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