U.S. natural gas, power plants and pipelines / PennWell's MAPSearch.
- Relief shown by shading. Depth shown by gradient tints. "Data sources: Energy Industry GIS data - PennWell MAPSearch. World Terrain Base Map Service - ESRI Inc. (ArcGIS Online)." Shows locations of major and minor power plants, pipelines, capital cities and major cities. Accompanies: Power engineering, v.119, no.7, July 2015. "Supplement to PennWell Co. Publications."
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