https://pubs.usgs.gov/of/2009/1151/data/navigation/seismics/shot100sort_geog.zip
John F. Bratton
2010
SHOT100SORT_GEOG.SHP: Point Shapefile of 100 Shot Interval Point Navigation For Seismic Data Collected in the Potomac River/Chesapeake Bay from Sept. 6, 2006 to Sept. 8, 2006 on USGS Cruise 06018
shot100sort_geog
vector digital data
David S. Foster
VeeAnn A. Cross
Continuous Resistivity Profiling and Seismic-Reflection Data Collected in 2006 from the Potomac River Estuary, Virginia and Maryland
VeeAnn A. Cross
David S. Foster
John F. Bratton
2010
Open-File Report
2009-1151
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://pubs.usgs.gov/of/2009/1151/
Open-File Report
2009-1151
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://pubs.usgs.gov/of/2009/1151/html/catalog.html
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
en
In order to test hypotheses about groundwater flow under and into Chesapeake Bay, geophysical surveys were conducted by U.S. Geological Survey (USGS) scientists on Chesapeake Bay and the Potomac River Estuary in September 2006. Chesapeake Bay resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge, which are contributing to eutrophication. The USGS has performed many related studies in recent years to provide managers with information necessary to make informed decisions about this issue. The research carried out as part of the study described here was designed to help refine nutrient budgets for Chesapeake Bay by characterizing submarine groundwater flow and discharge of groundwater beneath part of the mainstem and a major tributary, the Potomac River Estuary.
The purpose of this layer is to provide all of the 100 shot point navigation associated with the seismic-reflection profiles collected on USGS cruise 06018. This information can help spatially correlate the seismic-reflection profiles with other features and data in the GIS.
ground condition
20060906
20060908
None planned
-76.856653
-76.310250
38.295665
37.946077
-76.856653
-76.310250
37.946077
38.295665
General
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
Field Activity Serial Number 06018
Info Bank ID K-1-06-CH
R/V Kerhin
seismic-reflection navigation
shot point navigation
point shapefile
inlandWaters
location
oceans
oceans and estuaries
ISO 19115 Topic Category
oceans and coastal
North America
North Atlantic
United States
Virginia
Potomac River Estuary
Chesapeake Bay
Dennis Point Marina
Solomons, Maryland
Maryland
General
Patuxent River
None.
The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Shapefile
John F. Bratton
U.S. Geological Survey
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2254
(508) 457-2310
jbratton@usgs.gov
https://pubs.usgs.gov/of/2009/1151/data/navigation/seismics/shot100sort_geog.gif
Thumbnail image showing the location of the 100 shot interval seismic navigation collected from Sept. 6-8, 2006. The coastline is included for spatial reference.
GIF
file://\\IGSAGIEGWSVCRX0\forpublication\data\navigation\seismics\shot100sort_geog.shp
Local Area Network
002
0.138
Shapefile
An ArcView 3.3 avenue script written by the USGS in Woods Hole (point2line.ave) was used to connect the individual shot points using the attribute "linename" as the unique line identifier. That attribute is also brought over to the resulting polyline shapefile. This process step, as well as all subsequent process steps, were performed by the same person - VeeAnn A. Cross.
allshots.shp
2006
allshots_lns.shp
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
Using ArcMap 9.0 - ArcToolbox - Data Management Tools - Define Projection the polyline shapefile projection was defined as UTM, zone 18, NAD83.
allshots_lns.shp
allshots_lns.shp
2006
The polyline shapefile was converted to a route using ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Create Routes. The following tool parameters were used: Input line feature - allshots.shp; route identifier field - linename; output route feature class - allshots_route.shp. The rest of the parameters were left to the default values.
allshots_lns.shp
allshots_route.shp
2006
allshots_route.shp
This polyline route was then calibrated using ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Calibrate Routes. The following parameters were used: input route features - allshots_route.shp; route identifier field - linename; input point features - allshots.shp; point identifier field - linename; measure field - shot; output route feature class - allshots_route_Calibrate.shp; measure calculation method - distance; search radius 0. The rest of the parameters left at the default.
allshots.shp
allshots_route_Calibrate.shp
2006
Added hatches to the calibrated route using ArcMap 9.0 by opening the layer properties and selecting the Hatches tab. Create a hatch interval of 100 for the Hatch Class, then for Hatch Def(1) place a marker hatch every 1 hatch interval. From the Hatch Class Add a Hatch Definition - Add End Hatch Definition and set these to a marker Hatch. By displaying the labels for both Hatch Definitions, a quick comparison between the hatches and shot navigation makes sure things are behaving as intended. Then turn the labels off.
allshots_route_Calibrate.shp
allshots_route_Calibrate.shp
2006
Within ArcMap 9.0 - by going to Tools - Customize - Commands and scrolling down to the Category "Linear Referencing", the icon for the command "Convert Hatches to Graphics can be added to a toolbar. Once this is done, that tool can be used to convert the hatches to graphics.
2006
Convert these graphics to a shapefile using XTools Pro version 5.0.
displayed graphic points
shot100graphics.shp
2006
Use ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Locate Features Along Route. The following parameters were used: Input Features:shot100graphics.shp; Input Route Features - allshots_route_Calibrate.shp; route identifier field - linename; Search Radius - 5 meters; output event table - shot200graphics_LocateFeatur.dbf; output route identifier field - linename; measure field - shot. All the rest of the parameters left to the default.
shot100graphics.shp
allshots_route_Calibrate.shp
2006
shot100graphics_LocateFeatur.dbf
Use ArcMap 9.0 - ArcToolbox - Linear Referencing Tools - Make route Event Layer to create an event feature using the following parameters: Input Route Feature - allshots_route_Calibrate.shp; Route Identifier Field - linename; Input Event Table - shot200graphics_LocateFeatur.dbf; Event Table route Identifier Field - linename; event type - point; Measure field - shot; Layer Name - shot100graphics_LocateFeatur Events. The rest of the parameters left to the default.
allshots_route_Calibrate.shp
shot100graphics_LocateFeatur.dbf
2006
shot100graphics_LocateFeatur Events
Convert the event layer to a shapefile by exporting the data (right mouse click on event layer, Data, Export Data).
shot100graphics_LocateFeatur Events
shot100tmp.shp
2006
Using VACExtras version 1.95 (an ArcMap extension written in Woods Hole) in ArcMap 9.0 the attribute table of the shot navigation was sorted primarily by the attribute linename with a secondary sort field by the attribute shot.
shot100tmp.shp
shot100sort.shp
2006
There are lines that show no break between files because the Knudsen was set to record data and automatically switch files every 20,000 shots. This makes the last shot of one file the first shot of the subsequent file. This leads to duplicate shot #1 at these bounds during linear referencing. The first shot #1 should really be shot 19999 of the previous file. To account for this, the attributes of the shapefile were edited to reflect this (effectively removing the duplicate shots). So for instance, two records have the linename 0001_2006_249_1447_002 and shot 1. The first record was changed to linename 001_2006_249_1340_001 with shot number 19999. This way, every shot has a unique line number - shot combination.
shot100sort.shp
shot100sort.shp
2006
The shot point shapefile was reprojected to Geographic, NAD83 using ArcMap 9.2, ArcToolbox - Data management Tools - Projections and Transformations - Feature - Project. Because the input file and output file have the same datum, no datum transformation was required.
shot100sort.shp
shot100sort_geog.shp
2009
The seismic acquisition system used on this cruise was a Knudsen Engineering Limited (KEL) 1600 USB system. The system has up to 1.2 kW power and is tuned to work with two Massa 3.5 kHz transducers. The transducers were mounted on an over-the-side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. This draft offset was not included in the data acquisition. The seismic data acquisition software was SounderSuite-USB Beta. This system failed to acquire navigation data from the DGPS NEMA string on the first two days (Julian day 149 and 150). The software was also not able to record data in SEG-Y standard format. KEL KEB format files were logged to disk. In addition, KEA ASCII files with shot (ping) numbers and times were saved to disk. Shot point navigation was also absent in the KEA files on Julian days 149 and 150. On Julian day 151 a patched version of SounderSuite was received and installed. This version recorded navigation in the KEB and KEA files. SEG-Y recording was still not an option. A time server was used to synchronize the DGPS time on the KEL and HYPACK navigation systems. This was important as KEL SounderSuite records system time. Data were acquired at a 20 micro-second sample interval, 2048 samples for a 40 ms record length. Fire-rate was 0.20 seconds (or 5 shots per second). The KEL SounderSuite software was set up to automatically switch files at shot 20,000. Line 5 switched from file 0005_2006_249_2014_002.keb after shot 13509 to a new file (0005_2006_249_2014_003.keb) while changing display parameters, due to a bug in the acquisition software.
A differential global positioning system (DGPS) was used for the seismic-reflection data. This system was an Ashtech DGPS2 with the navigation being recorded by HYPACK navigation software. The offset from the seismic transducer to the DGPS antenna was 2 meters. This offset was not entered into the software.
Although bathymetry was not recorded directly with this system, bathymetry can be derived by tracing the seafloor reflector in the seismic-reflection profiles. The seismic transducers were mounted on an over the side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. The draft offset was not included in the data acquisition.
These points were visually checked to make sure they were viable fixes.
This shapefile represents the 100 shot interval navigation for all the seismic lines collected on this cruise.
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
shot100sort_geog
-76.856653
-76.31025
38.295665
37.946077
1
-76.856653
-76.31025
38.295665
37.946077
1
en
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2251
(508) 457-2310
vatnipp@usgs.gov
20100325
http://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
dataset
Downloadable Data
0.149 MB
1.39 MB
WinZip
9.0
This WinZip file contains the point shapefile as well as the associated metadata files.
DVD-ROM
4.75
GBytes
UDF
https://pubs.usgs.gov/of/2009/1151/data/navigation/seismics/shot100sort_geog.ziphttps://pubs.usgs.gov/of/2009/1151/html/catalog.html
None.
Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
John F. Bratton
U.S. Geological Survey
mailing and physical address
Woods Hole Coastal and Marine Science Center
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2254
(508) 457-2310
jbratton@usgs.gov
This WinZip file contains data available in ESRI point shapefile format. The user must have software capable of uncompressing the WinZip file and reading/displaying the shapefile.
Vector
Simple
Point
FALSE
4006
TRUE
TRUE
Entity point
4006
GCS_North_American_1983
Decimal degrees
0.000001
0.000001
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
GCS_North_American_1983
4006
shot100sort_geog
Feature Class
4006
Shapefile attribute table
ESRI
FID
FID
OID
4
0
0
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
ESRI
Coordinates defining the features.
linename
linename
String
254
The unique identifier for each line of data acquisition.
Software generated.
Text field identifying the line.
shot
shot
Number
19
11
The seismic shot number associated with the navigation fix.
Software generated.
1
19,999
shot number
Distance
Distance
Number
19
11
The distance (in meters) that the point falls off the calibrated route polyline.
ESRI Linear Referencing - Locate Feature Along Routes tool
0
0
meters
Id
Id
Number
6
An attribute carried over when the graphics hatches were converted to a shapefile.
Software generated (XTools Pro)
0
An element ID field generated when graphics are converted to a shapefile. The default value of 0 is supplied to all features upon creation.
XTools Pro.
20100325
20100325125114002010032512511400