ArcExplorer
ArcExplorer
is Geographical Information System software which presents map data. This
overview of ArcExplorer discusses aspects of ArcExplorer that are relevant
to this atlas. If you wish to know more about how ArcExplorer works,
you may access the Help Menu by pressing F1 or by going to the ESRI web
site, http://www.esri.com/.
Data may be presented in one or both of two
forms: vector data and raster image data. Each vector
data set is presented in the form of a theme, which is presented as a
layer. These layers are transparent, with data from other layers showing
through. Themes are listed in a column on the left side of the ArcExplorer
window. The first theme in the list is the top layer and the last theme
is the bottom layer. The order of the themes may be changed by dragging
the theme boxes up or down in the list, or by right clicking on the theme
and selecting "move to". Visibility of the themes is controlled
by clicking on the white square to the left of the theme name. When the
box has a check mark in it, the theme is visible. Data may be presented
in one of three shape types: point, line or polygon. During this introduction,
when the phrase 'data point' is used, it refers to a data point, data
line or data polygon. Clicking on the theme name or symbol results in
a box around the theme and this indicates that the theme is 'active'.
Only one theme can be active at any time and the active theme can be queried.
The following is a table of the themes that are available in this atlas:
Theme |
Description |
BOUNDARY |
Lines of vector data which
define the perimeters of the region. |
COASTLINE |
Lines of vector data which
define the coastlines of land bodies. |
LATITUDE/LONGITUDE |
Lines of vector data which
show the latitude and longitude graticules of the region. |
UTM GRID |
Lines of vector data which
show the Universal Transverse Mercator Zone 10 (Longitude reference:
-123). |
LAND |
The landmass surrounding the eastern Juan de Fuca Strait
is filled with a solid colour |
BATHYMETRY CONTOURS |
Lines of vector data which
show bathymetry contours. |
BATHYMETRIC RELIEF |
A sun-illuminated shaded relief map of BATHYMETRY of
the Strait. |
BATHYMETRY (Image) |
A colour raster image that
represents bathymetry data. |
BATHBAR (Image) |
A colour raster image that
provides a legend for the BATHYMETRY (Image) theme. |
MAPPED FAULTS |
Location of faults as presented in existing literature,
prior to this investigation |
REGIONAL GEOLOGY |
Polygons of vector data which
present the geologic setting for the region. |
GRAVITY CONTOURS |
Vector contour lines of raw
free-air gravity data. |
GRAVRAW (Image) |
Colour raster image of raw free-air gravity anomaly
data. |
GRAVRBAR (Image) |
A colour scale bar for the
RAW GRAVITY (Image) theme. |
GRAVPROC (Image)
|
Colour raster image of processed
free-air gravity anomaly data. |
GRAVPBAR (Image) |
A colour scale bar for the
PROCESSED GRAVITY (Image) theme. |
MAGNETICS CONTOURS |
Vector contour lines of aeromagnetic
anomalies. |
MAGRAW (Image) |
A colour raster image of
sun-illuminated aeromagnetic data. |
MAGRWBAR (Image) |
A colour scale bar for the
RAW MAGNETIC (MAGRAW) theme. |
MAGPROC (Image) |
A colour raster image of
processed sun-illuminated aeromagnetic data. |
MAGPRBAR (Image) |
A colour scale bar for the
PROCESSED MAGNETIC (MAGPROC) theme. |
TOMO1KM |
A colour raster image of TOMOGRAPHIC results (acoustic
velocity) at a 1 km depth slice. |
TOMO3KM |
A colour raster image of TOMOGRAPHIC results (acoustic
velocity) at a 3 km depth slice. |
TOMO5KM |
A colour raster image of TOMOGRAPHIC results (acoustic
velocity) at a 5 km depth slice. |
TOMOBAR |
A colour scale bar for the
TOMOGRAPHY themes. |
SEISMICITY: 0-5 km |
RECORDED EARTHQUAKES 1981-1999 for 0-5 km depth within
the crust |
SEISMICITY: 5-10km |
RECORDED EARTHQUAKES 1981-1999 for 5-10 km depth within
the crust |
SEISMICITY: ALL |
RECORDED EARTHQUAKES 1981-1999 for all crustal
events |
CORE SITES PGC96006 |
Points of vector data which
show the location of cores taken during the Geological Survey of Canada's
PGC96006 research cruise. |
CORE SITES PGC97007 |
Points of vector data which
show the location of cores taken during the Geological Survey of Canada's
PGC97007 research cruise. |
CORE SITES 1999 |
Points of vector data which
show the location of cores taken in 1999 |
TRACKLINES PGC96006 |
Lines of vector data which
show the tracklines run during the Geological Survey of Canada's PGC96006
research cruise. |
TRACKLINES PGC97007 |
Lines of vector data which
show the tracklines run during the Geological Survey of Canada's PGC97007
research cruise. |
SHIPS TRACKLINES |
Lines of vector data which
show the tracklines run during the Seismic Hazard Investigations
in Puget Sound (SHIPS) research cruise (PGC98002). |
USGS TRACKLINES |
Lines of vector data which
show the tracklines run during the 1995 United States Geological Survey's
research cruise. |
INDUSTRY (1) TRACKLINES |
Lines of vector data representing
industry tracklines. |
INDUSTRY (2) TRACKLINES |
Lines of vector data representing
industry tracklines. |
SANDWAVES |
Polygons of vector data showing locations of SAND WAVES
and DUNES. |
SURFICIAL GEOLOGY |
Polygons of vector
data showing the SURFICIAL GEOLOGIC UNITS of the seafloor |
DEPTH TO QUATERNARY |
Contours of the mapped DEPTH to the BASE of the QUATERNARY
section |
QDEPTH (image) |
Colour raster image of the DEPTH to the BASE of the
QUATERNARY. |
QDEPTBAR (image) |
Colour bar scale for the QDEPTH map |
QUATERNARY THICKNESS |
Contours of the mapped THICKNESS of the QUATERNARY section |
QTHICK (image) |
Colour raster image of the THICKNESS of the QUATERNARY
section |
QTHICBAR (image) |
Colour bar scale for the QTHICK map |
STRUCTURE POINTS |
Vector point data showing the location
of mapped structures from seismic reflection data. Points represent
Quaternary and pre-Quaternary FAULTS and FOLDS.
|
SEDIMENT DEFORMATION FEATURES |
Vector point data showing
the location of mapped SEDIMENT DEFORMATION features from seismic
reflection data. |
STRUCTURE |
Lines of vector data, showing
the trends of FAULTS and FOLDS as interpreted from the seismic reflection
and magnetic anomaly data. Data are broken into pre-Quaternary and
Quaternary faults and folds. |
The Map Tips tool is
available when a theme is activated. The Map Tips Window lists data fields
that are available for a particular theme. Select the field of interest,
click OK, and when the cursor moves over a data point of the active theme,
the value of the selected field is shown (Figure 1).
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Figure 1. Map Tips Tool Example.
Active Theme: TRACKLINES PGC96006
Selected Field: LINE
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Selecting the Theme Properties
tool or
double clicking on a theme, brings up a box in which you can change the
colour, style, size of symbol used. There is also the opportunity to change
the symbol classification. In order to use this data, it will not be necessary
to change the symbol or its classification. Changing the symbol classification,
however, provides an alternative method for viewing values for data points.
Choosing the 'No Overlapping Labels' classification option brings up a
window in which the user can choose the field to display values for, the
label font, the label size and label placement (Figure
2). Please note that, in this case, it is not necessary for the theme
to be active for the labels to be displayed and any number of themes may
utilize this symbol classification.
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Figure 2. Changing symbol classification
example.
Theme: TRACKLINES PGC96006
Symbol classification: No overlapping labels
Selected Field: LINE
Font: MS Sans Serif; size 8
Label Placement: Place above
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To facilitate navigation
around the map there are a variety of tools: Zoom In ,
Zoom Out ,
Zoom to Active Theme ,
Zoom to Full Extent ,
Zoom to Previous Extent and
Pan . For
the Zoom In and Zoom Out tools, the cursor may be clicked on a region
to zoom in or out. Also, the cursor may be clicked and dragged over a
rectangular area for a more specific view. Zoom to Active Theme changes
the view to the extent of the theme that is presently active. Zoom to
Full Extent allows one to view the combined extent of all the themes.
Zoom to Previous Extent changes the map view to the previous view. Pan
is used in a click and drag manner to move around the map. There is a
Direction Tool
which allows for panning in a north, south, east or west direction. A
drop down menu allows for direction choice and then clicking on the map
pans the view in the chosen direction.
The Find tool
brings up a window which allows the user to find a specific value. First,
type in the value to find (case-sensitive text). Next, select the search
type: any part of field, whole field or start of field. Finally, select
the theme or themes to be search. Clicking on the field selects (highlights)
it and clicking on a selected field deselects it. Holding down the Shift
button and clicking on consecutive fields allows more than one theme to
be selected. In order to choose themes that are not in consecutive order,
hold down the Ctrl button and click on the themes. To start the search,
press the Find button. All the fields in each selected Theme are searched
for the particular value. Search results are displayed on a table in the
Find Window. In order to locate a particular result, click on it within
the table of results. Then the option is given to highlight, pan to and/or
zoom to the selected result.
There is also a Query
Builder .
Using the Query Builder allows one to exactly define the subset of data
to highlight. Queries can combine data from different fields of the active
theme. The Query Window allows you to build the query string by clicking
on field(s), operators (<,=,>,>=, <>, <=, and, or, like)
and the values of selected fields. The string may also be typed in but
the query is precise and case sensitive so it is advisable to click on
the buttons in order to avoid errors and obtain the correct results. If
the string is typed in, % is used as a wildcard character. The option
of which field to display the results in or of showing all the attributes
of a given point is presented. After the string is complete and the display
field is chosen, click on the Execute button. The results are given in
a table within the Query Window. Results may be selected individually
and then highlight, pan and/or zoom may be selected. Entire results may
be examined by pressing the Highlight Results button and/or the Zoom to
Results button. A statistical analysis may also be performed on the values
of a theme. Clicking on the Statistics button displays a window in which
a field can be selected to perform the analysis on. The analysis results
in values for count, maximum, mean, minimum, standard deviation and sum.
Within the window, there is also the option of choosing to perform the
analysis on the query results and not the entire set of data within the
field. Query results may be saved by clicking on the Save button ,
or cleared by clicking the Clear button .
In order to determine all
the attributes of a particular point, choose the Identify Tool .
The Identify Tool may be used with the active theme only. When a feature
is clicked, a window appears which displays the X and Y coordinates (given
in UTM coordinates), the data values for each field, and the shape type
of the feature as well as the theme that is presently active.
Some of the ArcExplorer
data sets are presented as raster images. These themes are presented as
a whole unit rather than a group of point, lines or polygons and are identified
by (Image) after the theme title. Raster images are opaque, not transparent
like the theme layers are. For most of the raster images there is an accompanying
legend bar.
As an additional resource, ArcExplorer has
extensive help files. While you are in ArcExplorer, these may be accessed
by pressing F1 or by clicking on Help
in the Menu Bar. ESRI also has a web site http://www.esri.com/
from which further ArcExplorer and GIs
information can be obtained.
*ESRI and the ESRI
Logo are licensed trademarks of Environmental Systems Research Institute,
Inc.
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Overall
Citation
Mosher, D.C. and Johnson, S.Y. (eds.), Rathwell, G.J., Kung, R.B., and
Rhea, S.B. (compilers), 2000. Neotectonics of the eastern Juan de Fuca
Strait; a digital geological and geophysical atlas. Geological Survey
of Canada Open File Report 3931.
Specific Citations for
each map sheet:
Relief
Mosher, D.C., Kung, R., and Hewitt,
A.T., 2000. Modern surface morphology of the eastern Juan de Fuca Strait,
in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B.,
and Rhea, S.B. (Compilers), Neotectonics of the eastern Juan de Fuca Strait;
a digital geological and geophysical atlas. Geological Survey of Canada
Open File Report 3931
Regional Geology
Johnson, S.Y., and Mosher, D.C., 2000. The eastern Juan de Fuca Strait
- regional geology map, in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell,
G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of the eastern
Juan de Fuca Strait; a digital geological and geophysical atlas. Geological
Survey of Canada Open File Report 3931
Seismicity
Mulder, T., and Rogers, G., 2000. Recorded seismicity of the eastern Juan
de Fuca Strait, in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J.,
Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of the eastern Juan
de Fuca Strait; a digital geological and geophysical atlas. Geological
Survey of Canada Open File Report 3931
Potential Field Geophysics
(Gravity and Magnetics)
Blakely, R., and Lowe, C., 2000. Aeromagnetic anomalies of the eastern
Juan de Fuca Strait region,
in: Mosher, D.C. and Johnson, S.Y. (Eds.),
Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of
the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Lowe, C. and Blakely, R., 2000. Free-air and Bouguer gravity anomalies
of the eastern Juan de Fuca Strait region, in: Mosher, D.C. and Johnson,
S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics
of the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Tomography
Brocher, T., Parsons,
T., Fisher, M.A., Tréhu, A.M., Spence, G.D., and the SHIPS Working Group,
2000. Three-dimensional tomography in the eastern
Juan de Fuca Strait: preliminary results from SHIPS, the 1998 Seismic
Hazards Investigation in Puget Sound, in:
Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and
Rhea, S.B. (Compilers), Neotectonics of the eastern Juan de Fuca Strait;
a digital geological and geophysical atlas. Geological Survey of Canada
Open File Report 3931
Data
Control (Cruise Tracks and Core Positions)
Mosher, D.C., 2000. Data Report for
CCGS John P. Tully PGC96006 October
15-October 31, 1996, in: Mosher, D.C.
and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers),
Neotectonics of the eastern Juan de Fuca Strait; a digital geological
and geophysical atlas. Geological Survey of Canada Open File Report 3931
Mosher, D.C., 2000. Data Report for
CCGS John P. Tully PGC97007-
Leg I August 5-16, 1997,
in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B.,
and Rhea, S.B. (Compilers), Neotectonics of the eastern Juan de Fuca Strait;
a digital geological and geophysical atlas. Geological Survey of Canada
Open File Report 3931
Johnson, S.Y., Dadisman, S.V., Childs, J.R., and Rhea,
S.R., 2000. Data
Report for Cruise G3-95-PS, June, 1995, in:
Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and
Rhea, S.B. (Compilers), Neotectonics of the eastern Juan de Fuca Strait;
a digital geological and geophysical atlas. Geological Survey of Canada
Open File Report 3931
Mosher, D.C., Mi, Y., Hyndman, R.D., Fisher, M., and SHIPS Scientific
Party, 2000. SHIPS
(Seismic Hazard Investigations in Puget Sound) Multichannel Seismic Reflection
Tracklines, in: Mosher, D.C.
and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers),
Neotectonics of the eastern Juan de Fuca Strait; a digital geological
and geophysical atlas. Geological Survey of Canada Open File Report 3931
Johnson, S.Y., Dadisman, S.V., and Rhea, S.B., 2000. Industry
Seismic Reflection Tracklines, in: Mosher,
D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J., Kung, R.B., and Rhea, S.B.
(Compilers), Neotectonics of the eastern Juan de Fuca Strait; a digital
geological and geophysical atlas. Geological Survey of Canada Open File
Report 3931
Quaternary geology (Bathymetry,
Surficial Geology and Quaternary Depth and Thickness)
Mosher, D.C., Kung, R.B., and Hewitt, A.T., 2000. Seafloor morphology
of the eastern Juan de Fuca Strait,
in: Mosher, D.C. and Johnson, S.Y. (Eds.),
Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of
the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Hewitt, A.T., and Mosher, D.C., 2000. Surficial geology of the eastern
Juan de Fuca Strait,
in: Mosher, D.C. and Johnson, S.Y. (Eds.),
Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of
the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Johnson, S.Y., Rhea, S.B., Dadisman, S.V., and Mosher, D.C., 2000. Depth
to the base-of-Quaternary in the eastern Juan de Fuca Strait region,
in: Mosher, D.C. and Johnson, S.Y. (Eds.),
Rathwell, G.J., Kung, R.B., And Rhea, S.B. (Compilers), Neotectonics of
the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Johnson, S.Y., Rhea, S.B., Dadisman, S.V.,
and Mosher, D.C., 2000. Thickness of Quaternary strata in the eastern
Juan de Fuca Strait region,
in: Mosher, D.C. and Johnson, S.Y. (Eds.),
Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of
the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Neotectonics
Mosher, D.C., 2000. Distribution of soft-sediment deformation features
in the eastern Juan de Fuca Strait, in: Mosher, D.C. and Johnson, S.Y.
(Eds.), Rathwell, G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics
of the eastern Juan de Fuca Strait; a digital geological and geophysical
atlas. Geological Survey of Canada Open File Report 3931
Johnson, S.Y., Mosher, D.C., Dadisman, S.V., Childs, J.R., and Rhea, S.B.,
2000. Tertiary and Quaternary structures of the eastern Juan de Fuca Strait:
point map, in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell, G.J.,
Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of the eastern Juan
de Fuca Strait; a digital geological and geophysical atlas. Geological
Survey of Canada Open File Report 3931
Johnson, S.Y., Mosher, D.C., Dadisman, S.V., Childs, J.R., and Rhea, S.B.,
2000. Tertiary and Quaternary structures of the eastern Juan de Fuca Strait:
interpreted map, in: Mosher, D.C. and Johnson, S.Y. (Eds.), Rathwell,
G.J., Kung, R.B., and Rhea, S.B. (Compilers), Neotectonics of the eastern
Juan de Fuca Strait; a digital geological and geophysical atlas. Geological
Survey of Canada Open File Report 3931
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