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Data Format: Surface
effects maps are provided in ArcGIS (v. 8.2) geodatabase format and ArcView
(v. 3.2) shapefile format. For more information view Organization
of the GIS Map Archive. Area
of Coverage: Surface effects maps are provided for all mapped
detonations of the NTS. Principal
Testing Areas are: Yucca Flat (yfse), Pahute Mesa (pmse), and Other Areas
(oase) including the Frenchman Flat, Rainier/Aqueduct Mesa,
Climax Stock, Shoshone Mountain, Buckboard Mesa, and Dome Mountain
testing areas. Map
Projection: All surface effects maps are in Nevada State Plane (central), North American Datum 1927 (NAD27), in feet
Surface effects maps in shapefile format are also provided in
Universal Transverse Mercator (zone 11), North
American Datum 1983 (NAD83), in meters. Filename suffixes "n27f" and
"u83m" are used to distinguish between Nevada State Plane and Universal Transverse
Mercator projections. Map
Layers and Data
Types: Five principal GIS surface effects map layers (themes) are contained in the archive. They
are: (1) the sites database (vector, points), (2) the
surface effects maps (vector, lines), (3) the surface effects bar
symbols for faults (vector, lines), (4) the surface effects ball
symbols for faults (vector, points), and (5) the original, hand-drawn
(mylar) maps (raster, scanned and georeferenced TIFF file maps).
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Geodatabase Approach:
The geodatabase approach is the most efficient and least cumbersome
way to construct surface effects maps from the data stored in the GIS Surface Effects Map
Archive. The archive contains a geodatabase file for each of the three principal
testing areas (yfse.mdb, pmse.mdb, and oase.mdb) and for the sites
database (se_sites.mdb). The geodatabase and
group layer files are intended to be used with ESRI ArcGIS software
(v. 8.2, and above).
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Surface Effects Maps:
Each surface effects geodatabase contains three principal map layers--the surface
effects maps, the bar symbols, and the ball symbols--as well as linked annotation that automatically labels the ball-and-bar fault symbols.
Access to the surface effects maps is provided using group layer files.
Example group layer files are located in the
"Arc_layers" root-level folder of the archive to further simplify the
map making process. The group layer files (1) access the
geodatabase map layers, (2) display the surface effects map layers and
the ball-and-bar fault
symbol layers in the correct order using
prepared symbol styles, line weights, and colors, and (3) label each ball-and-bar fault symbol.
Additionally, each map layer is displayed on-screen at a specific scale to
improve map viewing performance. Group layer files are
provided for each of the three testing areas, each operational
area, and many individual detonation sites. The example group layer
files ca be used to construct additional
group layer files to display any detonation site, group of detonation sites, or surface
effects characteristic of interest.
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Sites Database: A
geodatabase is provided for the sites database (se_sites.mdb). A group layer file (Se_Sites (Group).lyr) loads the sites database,
displays the detonation sites using prepared symbol styles and colors,
and automatically labels all detonation sites using borehole
identification number.
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Basemaps: Basemaps
in shapefile format are stored in the "Basemaps" root-level
folder. A group layer file (NTS Basemaps (Group).lyr)
loads and displays the basemaps using prepared symbol styles
and colors. See Basemaps
for a description of themes contained in the archive.
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Projection: All geodatabases
and basemaps are in Nevada State Plane
(central), NAD27, in feet. On-the-fly projection changes are performed
from within the ArcMap interface of ArcGIS (v. 8.2, and above).
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Example ArcMap Project
Files: Example ArcMap project files are contained in the
"Arc_maps" root-level folder. These files use the
geodatabase and group layers approach. Project files are included for
(1) the three principal testing areas (oase_semaps.mxd, pmse_semaps.mxd,
and yfse_semaps.mxd); (2) a single NTS Operational Area--Area 8 (area08_semaps.mxd);
(3) the detonation sites database (se_sites.mxd); (4) three individual
detonation sites (u-12t_08_semaps.mxd, u-20at_semaps.mxd, and u-7y_semaps.mxd);
and (5) the scanned and georeferenced versions of the original,
hand-drawn surface effects maps (orig_mylar_semaps.mxd). Use these
with ArcGIS (v. 8.2, and above) as a guide for constructing additional
surface effects maps of interest.
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Example Map: The following is an example of a surface effects
map constructed using the geodatabase approach. It
took five minutes to prepare this map using the geodatabases and group
layer files contained in the archive.
Shapefile
Approach:
The shapefile approach provides database access and map construction
using any GIS mapping software capable of reading shapefile themes.
The archive contains shapefiles for all testing areas, operational areas, and individual detonation sites
of the NTS. Shapefile for all surface effects maps and the sites
database are provided in both Nevada State
Plane (n27f) and Universal Transverse Mercator (u83m) projection
systems. For
more information about the shapefiles contained in the archive see Organization
of the GIS Map Archive. Shapefiles are intended to be used with ESRI
ArcView GIS software (v. 3.2, and above).
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Surface Effects Maps:
Unlike the geodatabase approach, shapefiles need to be accessed individually.
For this reason the archive contains separate map files for each
of the three components
that make up a surface effects map--the surface effects features, the bar symbols, and the ball
symbols. ArcView legend (*.avl) and projection (*.prj) files are
also included to
simplify the map making process. The legend files load the correct symbol styles, line
weights, and colors for each theme, while the projection files display
the map using the correct projection system. The intended order of these
map themes is surface effects map, bar symbol, and ball symbol
(from bottom to top) on the map. Ball-and bar symbol labels, which are contained
in the attribute table of the ball symbol themes, need to be added
manually to the map.
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Sites
Database: The sites database is provided in shapefile format in
n27f and u83m projection formats. ArcView legend (*.avl) and projection (*.prj) files are
included to
simplify the map making process. Detonation site labels, which are contained
in the "siteid" field of the attribute table, need to be added
manually to the map.
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Basemaps:
Basemaps in shapefile format are stored in the "Basemaps"
root-level folder. ArcView legend (*.avl) and projection (*.prj) files are
included to
simplify the map making process. See Basemaps
for a description of themes contained in the archive.
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Projection:
Shapefiles are provided in both Nevada State
Plane (n27f) and Universal Transverse Mercator (u83m). Use the n27f version
of the shapefiles to display the GIS surface effects maps and sites
database correctly over the
original mylar maps.
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Example
Map:
The following is an
example of a surface effects map constructed using the shapefile
approach. It took considerably longer to prepare this map, when compared
to the geodatabase approach, however, the results are comparable.
Viewing the Original,
Hand-Drawn (Mylar) Maps:
The original surface
effects maps are contained in the archive for permanent storage and
reference purposes only. These digitally reproduced maps are the
scanned and georeferenced copies of the original analog (Mylar and
paper) maps.
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Original Surface Effects Maps:
Scanned and
georeferenced copies of the original, hand-drawn surface effects maps are
stored in the archive in compressed (zip file) format due to space
constraints. These map data
can be used to display the original surface effects maps.
The maps are in TIFF image (raster) format using Packbits compression,
and are georeferenced to the Nevada State Plane projection. Use zip-capable
decompression software to
uncompress the "mylars.zip" files from their current
locations in the archive. There is a mylars.zip file for each testing
area. The files are located in the ..\se_data\oase,
..\se_data\pmse, and ..\se_data\yfse folders. When these files are
uncompressed a new "mylars" folder
will be created in each of these locations and populated with
the original surface effects maps for each of the three testing areas.
Drive space required is
approximately 62 MB, 56 MB, and 72 MB for the oase, pmse, and yfse
testing areas, respectively.
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Example Map:
The following is an example of the original (mylar) map for the Latir detonation
(U-4d) compared to the GIS digital reproduction of this map.
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