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U.S. Geological Survey Open-File Report 2005-1306

Continuous Resistivity Profiling Data from the Upper Neuse River Estuary, North Carolina, 2004-2005


GIS Introduction

This CD-ROM contains an Environmental System Research Institute (ESRI) ArcView 3.3 Geographic Information Systems (GIS) project file in the top-level directory. This project file, neuse.apr, does not require any extensions that are not standard to ArcView 3.3. For those users who do not have ArcView 3.2 or later, the individual GIS data files can still be viewed with a compatible GIS viewer, or a free GIS viewer such as ArcExplorer available from ESRI (http://www.esri.com). Please note that the ArcExplorer software is limited to the Microsoft Windows operating systems and some UNIX operating systems.

Data Catalog

Federal Geographic Data Committee (FGDC) compliant metadata are available for all the data contained on this CD-ROM. Each data set has metadata available in several formats. The information contained within each file is the same, just presented differently to help make the information more user friendly. The text, HTML, and FAQ versions of the metadata have links to those files provided below. In addition, ArcGIS 9.0 compatible XML metadata are available for use with ArcCatalog. All metadata are stored in the directories delineating the data type. For example, the metadata for individual days of collection for the 2004 raw data reside in the data/2004/raw_res folder.

Shapefiles generally include *.shp, *.shx, and *.dbf files at a minimum. For the sake of brevity, only the filename prefix has been included in the filename designation listed below. All the files necessary to load a shapefile have been compressed into a single WinZip file, including all forms of the metadata. Therefore, these shapefiles can be downloaded directly from the CD, or by clicking on the filename in the data catalog and saving the "zipped" files to a preferred location and uncompressing them. Georeferenced images and their supplemental files can be transferred in the same manner.

ESRI formatted grids cannot be copied directly from the CD-ROM. To successfully copy an ESRI grid, ESRI software such as ArcView or ArcCatalog need to be used. For that reason, the estuary bathymetry grid was exported from the ESRI software into an ESRI ASCII grid format. This ASCII grid and its projection file were then WinZipped into a single file. This "zipped" file is available for download by clicking on the filename. When importing this grid, be sure to import it as floating point rather than as an integer grid. In addition to providing the grid of this dataset, a color shaded-relief TIFF image is also available.

The CRP data are available based on date of collection. Each line of data is comprised of more than one file necessary for processing or as an output from the processing. These data are available in a WINZIP format with the file comprising a day of collection for each of the states of processing (e.g. raw, processed, RES2DINV format). These files can be downloaded directly from the CD-ROM, or by clicking on the filename in the data catalog and saving the"zipped" files to a preferred location and uncompressing the zipped file.

Clicking the camera icon will give a preview of the data set. No graphic is presented for the CRP data as these images can be browsed from the profile preview pages or from the individual folders.

For guidance on where to obtain software capable of reading shapefiles and uncompressing zipped files, see the system requirements page.

basemap (data/basemap)

Filename Description
Metadata
dtl_sttrim.*
polygon shapefile with a portion of the United States for orientation purposes
estuaryimg_geog.*
color shaded-relief TIFF image, geographic coordinates of the estuary bathymetry in the Neuse River area
estuarygrd.*
grid (ESRI format) of the estuary bathymetry in the Neuse River area (UTM, zone 18, NAD83)
noaacoast_neuse.*
polyline shapefile of a portion of the NOAA medium resolution shoreline in the study area

navigation (data/navigation)

Filename Description
Metadata
restracklines_04.*
polyline shapefile of CRP tracklines, 2004 survey
res_100mpnts_04.*
point shapefile CRP location every 100 meters along the trackline, 2004 survey
res_500mpnts_04.*

point shapefile CRP location every 500 meters along the trackline, 2004 survey
restracklines_05.*
polyline shapefile of CRP tracklines, 2005 survey
res_100mpnts_05.*
point shapefile CRP location every 100 meters along the trackline, 2005 survey
res_500mpnts_05.*
point shapefile CRP location every 500 meters along the trackline, 2005 survey
extendedlines_05.*
polyline shapefile extending certain CRP lines shoreward, 2005 survey

2004 CRP data
raw CRP data (data/2004/raw_resis): includes the STG and GPS files.
processed CRP data (data/2004/proc_resis): winzip file includes the EarthImager processed files using the default water resistivity; EarthImager processed files using measured water resistivity; and the Matlab generated profiles - one based on the default water resistivity and one based on measured water resistivity.
RES2DINV format CRP data (data/2004/res2dinv_format): winzip file includes the RES2DINV format file based on the linearized STG file, and the DEP file containing the measured water resistivity value.

See the metadata or the Data Processing page for more details on the individual file types.

Filename Description
Metadata
apr19_raw.* WINZIP file containing the raw CRP data from April 19, 2004
apr20_raw.* WINZIP file containing the raw CRP data from April 20, 2004
apr21_raw.* WINZIP file containing the raw CRP data from April 21, 2004
apr22_raw.* WINZIP file containing the raw CRP data from April 22, 2004
apr23_raw.* WINZIP file containing the raw CRP data from April 23, 2004
apr19_proc.* WINZIP file containing the processed CRP data from April 19, 2004
apr20_proc.* WINZIP file containing the processed CRP data from April 20, 2004
apr21_proc.* WINZIP file containing the processed CRP data from April 21, 2004
apr22_proc.* WINZIP file containing the processed CRP data from April 22, 2004
apr23_proc.* WINZIP file containing the processed CRP data from April 23, 2004
apr19_res2dinv.* WINZIP file containing the RES2DINV format CRP data from April 19, 2004
apr20_res2dinv.* WINZIP file containing the RES2DINV format CRP data from April 20, 2004
apr21_res2dinv.* WINZIP file containing the RES2DINV format CRP data from April 21, 2004
apr22_res2dinv.* WINZIP file containing the RES2DINV format CRP data from April 22, 2004
apr23_res2dinv.* WINZIP file containing the RES2DINV format CRP data from April 23, 2004

2005 CRP data
raw CRP data (data/2005/raw_resis):
includes the STG and GPS files.
processed CRP data (data/2005/proc_resis): winzip file includes the EarthImager processed files using the default water resistivity; EarthImager processed files using measured water resistivity; and the Matlab generated profiles - one based on the default water resistivity and one based on measured water resistivity.
RES2DINV format CRP data (data/2005/res2dinv_format): winzip file includes the RES2DINV format file based on the linearized STG file, and the DEP file containing the measured water resistivity value.

See the metadata or the Data Processing page for more details on the individual file types.

Filename Description
Metadata
may3_raw.* WINZIP file containing the raw CRP data from May 3, 2005
may4_raw.* WINZIP file containing the raw CRP data from May 4, 2005
may5_raw.* WINZIP file containing the raw CRP data from May 5, 2005
may3_proc.* WINZIP file containing the processed CRP data from May 3, 2005
may4_proc.* WINZIP file containing the processed CRP data from May 4, 2005
may5_proc.* WINZIP file containing the processed CRP data from May 5, 2005
may3_res2dinv.* WINZIP file containing the RES2DINV format CRP data from May 3, 2005
may4_res2dinv.* WINZIP file containing the RES2DINV format CRP data from May 4, 2005
may5_res2dinv.* WINZIP file containing the RES2DINV format CRP data from May 5, 2005

 


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