2: The three map layers are named as follows: pmse_n27f: polyline coverage containing the surface effects map features pmse_bar_n27f: polyline coverage containing the bars of the bar-and-ball symbols pmse_ball_n27f: point coverage containing the balls of the bar-and-ball symbols
3: The bar-and-ball symbols are used to illustrate vertical displacement on the down-thrown side of faults and vertically displaced cracks. The ball symbols (point coverage) contain an attribute field named OFFSET_CM. This field contains a numerical value that is used to label the fault symbols. The value indicates the amount of vertical offset (in centimeters) that was originally measured for these features.
Grasso, Dennis, 20030525, Pahute Mesa--GIS Surface Effects Map Archive: Open-File Report ofr-03-151, U.S. Geological Survey, USGS Denver Federal Center, Denver, Colorado.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000128
Ordinates (y-coordinates) are specified to the nearest 0.000128
Planar coordinates are specified in survey feet
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.400000.
The flattening of the ellipsoid used is 1/294.978698.
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 16827 |
| Units: | Integer |
| Resolution: | 1 |
| Value | Definition |
|---|---|
| Polyline | Shape type |
| Value | Definition |
|---|---|
| Area20 | NTS Operation Area |
| Value | Definition |
|---|---|
| U-20at | Hole (borehole) name |
| Value | Definition |
|---|---|
| crack | Feature type |
| Range of values | |
|---|---|
| Minimum: | 117.59 |
| Maximum: | 7836.95 |
| Units: | Feet |
| Resolution: | 0.01 |
| Value | Definition |
|---|---|
| Original Mylar U-20at | Source map information |
| Value | Definition |
|---|---|
| Boxcar Fault | A map label |
| Range of values | |
|---|---|
| Minimum: | 3.43555304513742 |
| Maximum: | 15865.0320003368 |
| Units: | Feet |
| Resolution: | 0.00000000000001 |
Many investigators of the U.S. Geological Survey, the Los Alamos National Laboratory, the Lawrence Livermore National Laboratory, and the Defense Threat Reduction Agency performed the tedious task of mapping surface effects at the Nevada Test Site. These investigators comprehensively documented the surface effects of more than 600 underground nuclear detonations. A short list of those involved include F.M. Byers Jr., H.R. Covington, D.D. Dickey, G.L. Dixon, M.N. Garcia, E.C. Jenkins, Florian Maldonado, P.P. Orkild, T.L. Prather, R.P. Snyder, R.R. Spengler, Susan Steele Wier, Pete Thompson, W.S. Twenhofel, and Dean Townsend of the USGS; and Brian Allen, Anne Cavazos, Sigmund Drellack, Jose Gonzales, Ward Hawkins, Richard McArthur, Lawrence McKague, William McKinnis, Lance Prothro, William Davies, Casey Schmidt, and Margaret Townsend of the National Laboratories. Their combined mapping efforts and reports documented the surface effects produced by nearly 41 years of underground nuclear detonations at the Nevada Test Site between 1951 and 1992. The digital GIS data presented here will preserve the arduous achievements of those who spent countless hours in the pursuit of knowledge and understanding about the surface effects of underground nuclear testing.
U.S. Geological Survey
c/o Ric Page
Geologist
Box 25046, MS 913; Denver Federal Center
Denver, Colorado 80225-0046
USA
Ric Page at (303) 236-1141 (voice)
rpage@usgs.gov
Post-detonation surface effects maps were produced for detonation sites using field and aerial-photo mapping techniques. The fractures produced by the detonations were mapped and reported on in many USGS Technical Letter reports. Features mapped included surface cracks (and fractures), collapse sinks, various types of fault movements, pressure ridges, and reactivated cracks. A final surface effects map, or "crack map" as they were often called, was prepared on stable-base mylar drafting film for use in USGS publications and reports. Ultimately, these maps were stored by the USGS in map files at the Denver Federal Center, Lakewood, Colorado. The digital reproduction and archiving of these maps was implemented as a means to not only store the original crack maps in a more permanent compact disc format, but to also make them accessible for scientific study and management activities.
Grasso, Dennis, 20030525, GIS Surface Effects Map Archive, Nevada Test Site, Nevada: Open-File Report ofr-03-151, U.S. Geological Survey, Denver Federal Center.
Person who carried out this activity:
Ric PageData sources used in this process:
U.S. Geological Survey
Geologist
Box 25046, MS 913; Denver Federal Center
Denver, Colorado 80225-0046
USA
Ric Page at (303) 236-1141 (voice)
rpage@usgs.gov
All attribute data were entered during the digitizing process. Each digitized map element contains a logical array of attributes. Information about these attributes is listed in this metadata file. All of the attribute data created during the preparation of the GIS Surface Effects Map Archive were verified against the original source maps, reviewed, and thoroughly tested for accuracy, naming consistency, and spelling.
The horizontal positional accuracy of the original surface effects maps is unknown. The digitizing accuracy of the vector conversion of these maps was maintained by on-screen digitizing at very large map scales (1:500 to 1:1,200) from the scanned and georeferenced original maps. A root mean square error (RMSE) of 0-3 meters (0-10 ft), as measured on the ground, was maintained during the preparation (scanning and georeferencing) of the original maps. No formal tests were performed.
NA
These data are considered to be complete. All available surface effects maps, which were originally prepared on a site-by-site basis for the testing area, were scanned, georeferenced, and digitally transformed into vector-base GIS databases. These maps comprise the GIS Surface Effects Map Archive. Any maps that may have been lost, misplaced, or destroyed prior to the start of this GIS archiving project in October 1997 were unavailable, and therefore not included in the archive.
All observed and identified surface effects were documented directly on aerial photographs or topographic base maps at scales ranging from 1:1,200 to 1:2,400. Some of these surface effects maps were published in USGS Open-File Reports and Professional Papers, however, most were stored as unpublished maps, reports, and memos, and some were only stored as raw field notes. For each site, every attempt was made to find the "final" version of the map (preferably the master drawing for clarity) and to verify map scale and authenticity. These "original" maps were digitally reproduced for this data set.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None
U.S. Geological Survey
Central Publications Group, Mail Stop 902, Box 25046, Denver Federal Center
Lakewood, CO 80225-0046
(303) 236-5486 (voice)
U.S. Geological Survey Open-File Report
This Compact Disc (CD) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Although all data and software published on this CD have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
| Data format: | Shapefiles |
|---|---|
| Network links: |
<http://pubs.usgs.gov/of/2003/ofr-03-151> |
U.S. Geological Survey
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United States
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U.S. Geological Survey Open-File Report
This Compact Disc (CD) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Although all data and software published on this CD have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
Available as one printed map sheet plus one pamphlet. Order from USGS at the address listed above or see <http://rmmcweb.cr.usgs.gov/public/mod/order.html> for more ordering information.
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U.S. Geological Survey
c/o Ric Page
Geologist
Box 25046, MS 913; Denver Federal Center
Denver, Colorado 80225-0046
USA
Ric Page at (303) 236-1141 (voice)
rpage@usgs.gov