| Autor: |
Cahan, Steven M., Garrity, Christopher P., Soller, David R., Vigil, José L. |
| Předmět: |
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| Zdroj: |
Data Series - U. S. Geological Survey; 2021, Issue 1150, p7-8, 2p |
| Abstrakt: |
This dataset contains over 20,000 polygons representing geologic age and rock class, as depicted in the 2003 map entitled “The North America Tapestry of Time and Terrain” (NATTT). The creation of the NATTT map dataset was done in part by a commercial vendor and finalized by the U.S. Geological Survey (USGS), in Esri geographic information system (GIS) format. This dataset has companion layer files, which mirror the symbology used in the original NATTT map publication. The data are intended to be used at the scale of the published source map (1:8,000,000). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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