Skip past header information
USGS - science for a changing world

U.S. Geological Survey Open-File Report 2010-1094

Continuous Resistivity Profiling Data from the Corsica River Estuary, Maryland


Continuous Resistivity Profile Previews - May 15, 2007

Skip past contents information

The table below contains previews of the CRP data processed using the average measured water resistivity value (WRES) of 1.0345 ohm-m. Both the EarthImager 2D JPEG image and the MATLAB JPEG image of each processed file are presented. In addition, the trackline map below is a "clickable" map. By clicking on a line name, a new window will open with the processed images from that particular line segment. This new window will contain the MATLAB JPEG image as well as a reduced version of the EarthImager 2D JPEG image (short version). The beginning of each line is marked with a triangle on the map. The left side of the associated JPEG image represents the beginning of the line and corresponds to the triangle on the map. Julian day 135 is May 15, 2007; Julian day 136 is May 16, 2007; and Julian day 137 is May 17, 2007. Line names represent the original line names created in the field.

Trackline map of processed CRP lines collected in the Corsica River Estuary on May 15, 2007. Line names provide hotlinks to the JPEG profiles.

Preview of Profiles - click individual images to see full-size JPEG images of the profile. For the EarthImager 2D versions, the long version of the profile is available. All of the profiles are available for download from the Data Catalog page.

In the EarthImager 2D version, the white line in the image represents the water depth as measured by the fathometer. In the MATLAB-generated JPEG images, the water depth is represented by a black line. The JPEG images resulting from the EarthImager 2D processing were saved with the default color scale generated by the software. This color scale ranges from blues to reds with reds representing the higher resistivity values which correspond to fresher (less saline) groundwater. Each individual image has the scale maximized for the range of resistivity values in that dataset. The MATLAB versions of the JPEG images use a common color scale for all the files to facilitate profile comparison. For these images, the polarity of the color scheme is the same as that of the EarthImager 2D JPEGs in that the colors range from blue to red with reds representing higher resistivity values. In the MATLAB version, the X-axis represents distance along line in meters. The EarthImager 2D version X-axis units are latitude and longitude (position) along line. On the second day of surveying, the temperature information was available at times and included with the resistivity profile when available. The temperature information was available for all of the lines on the third day of surveying. On extremely short lines that did not require the roll-along processing, the temperature plot is not generated during processing.

The original data collected for lines L12F1 and L12F2 had very sparse depth information. Additional processing was required to generate depth values so that a more complete DEP file could be generated by the Marine Log Manager and susbsequently modified to incorporate the water resistivity value. The table below includes both the original processed data file (without depth values) and the processed data file with depth values for L12F1. Due to the extremely short length of L12F2, only the original processed data are included.

 

EarthImager version MATLAB version

May 15, 2007: Line L1F1, WRES = 1.0345
EarthImager thumbnail JPEG image of line 1 resistivity and temperature profile.

Matlab thumbnail JPEG image of line 1 resistivity profile.
May 15, 2007: Line L2F1, WRES = 1.0345
EarthImager thumbnail JPEG image of line 2 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 2 resistivity profile.
May 15, 2007: Line L3F1, WRES = 1.0345
EarthImager thumbnail JPEG image of line 3 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 3 resistivity profile.
May 15, 2007: Line L4F1, WRES = 1.0345
EarthImager thumbnail JPEG image of line 4 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 4 resistivity profile.
May 15, 2007: Line F5L1, WRES = 1.0345
EarthImager thumbnail JPEG image of line 5 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 5 resistivity profile.
May 15, 2007: Line L6F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 6 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 6 resistivity profile.
May 15, 2007: Line L7F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 7 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 7 resistivity profile.
May 15, 2007: Line L8F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 8 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 8 resistivity profile.
May 15, 2007: Line L9F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 9, file 1 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 9, file 1 resistivity profile.
May 15, 2007: Line L9F2, WRES =1.0345
EarthImager thumbnail JPEG image of line 9, file 2 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 9, file 2 resistivity profile.
May 15, 2007: Line L10F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 10 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 10 resistivity profile.
May 15, 2007: Line L11F1, WRES =1.0345
EarthImager thumbnail JPEG image of line 11 resistivity and temperature profile.
Matlab thumbnail JPEG image of line 11 resistivity profile.
May 15, 2007: Line L12F1, WRES not defined
EarthImager thumbnail JPEG image of line 12, file 1 resistivity profile.
Matlab thumbnail JPEG image of line 12, file 1 resistivity profile.
May 15, 2007: Line L12F1, WRES =1.0345 ***Fixed bathymetry
EarthImager thumbnail JPEG image of line 12, file 2 resistivity and temperature profile with repaired bathymetry.
Matlab thumbnail JPEG image of line 12, file 1 resistivity profile with repaired bathymetry.
May 15, 2007: Line L12F2, WRES not defined
EarthImager thumbnail JPEG image of line 12, file 2 resistivity profile.
Matlab thumbnail JPEG image of line 12, file 2 resistivity profile.
Skip USGS links group

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USAGov logo U.S. Department of the Interior | U.S. Geological Survey
End of USGS links group

Link to line 1 EarthImager and MATLAB JPEG profiles.Link to line 2 EarthImager and MATLAB JPEG profiles. Link to line 3 EarthImager and MATLAB JPEG profiles. Link to line 4 EarthImager and MATLAB JPEG profiles. Link to line 5 EarthImager and MATLAB JPEG profiles. Link to line 6 EarthImager and MATLAB JPEG profiles. Link to line 7 EarthImager and MATLAB JPEG profiles. Link to line 8 EarthImager and MATLAB JPEG profiles. Link to line 9 file 1 EarthImager and MATLAB JPEG profiles. Link to line 9 file 2 EarthImager and MATLAB JPEG profiles. Link to line 10 EarthImager and MATLAB JPEG profiles. Link to line 11 EarthImager and MATLAB JPEG profiles. Link to line 12 file 1 EarthImager and MATLAB JPEG profiles. Link to line 12 file 2 EarthImager and MATLAB JPEG profiles.