Online Links:
Online Links:
The purpose of this dataset is to provide the raw and modified raw continuous resistivity profile data collected on April 14, 2010 in Indian River Bay by the AGI SuperSting system. Modifications to the raw data were necessary in order to prepare the data for processing. In order to effectively process the resistivity data, valid depth values are necessary. This raw dataset contains the original GPS files as well as the "newgps" files that are used in the eventual processing of the data.
awkhold:
BEGIN {
FS = ","
}
{
FS = ","
ARGC = 2
depth = -9999
temp = -9999
if ($1=="$GPRMC")
{
utctime = $2
utcdate = $10
latdeg = substr($4,1,2)
latmin = substr($4,3,6)
declat = latdeg + (latmin/60)
londeg = substr($6,1,3)
lonmin = substr($6,4,6)
declon = -1 * (londeg + (lonmin/60))
if (NR==1) {
holddepth = -9999
holdtemp = -9999
}
else {
printf("%s, %s, %9.6f, %9.6f, %5.1f, %5.1f, %s\n", holdutctime, holdutcdate, holddeclon, holddeclat, holddepth, holdtemp, ARGV[2])
}
holdutctime = utctime
holdutcdate = utcdate
holddeclon = declon
holddeclat = declat
holddepth = -9999
holdtemp = -9999
}
if ($1=="$SDDPT")
{
depthreal = $2
holddepth = depthreal
}
if ($1=="$SDMTW")
{
tempreal = $2
holdtemp = tempreal
}
}
END {
printf("%s, %s, %9.6f, %9.6f, %5.1f, %5.1f, %s\n", holdutctime, holdutcdate, holddeclon, holddeclat, holddepth, holdtemp, ARGV[2])
}
This file was executed by a shell script to effectively batch process all the files in a single folder with the extension gps. The batch processor was dohold.
dohold:
files=`ls *.gps | cut -d. -f1 | tr "[A-Z"] ["a-z"]` for file in $files do awk -f awkhold $file.gps $file > $file.holds doneUnder Cygwin, all of the *.holds files were concatenated into a single comma-delimited text file and a header line added to the file. The header line added to the text file was: gpstime, gpsdate, longitude, latitude, depth_m, temp_c, line. Using ArcMap 9.2 - Tools - Add XY Data, the comma-delimited text file was added as an event theme to ArcMap. Quick visual inspection spotted erroneous navigation fixes. These fixes were then deleted from the original GPS files. These edits were performed on L6F1, L6F7, and L7F7. The modified GPS files had "_mod" appended to the prefix of the filename. Person who carried out this activity:
awknewgps:
BEGIN {
FS=","
}
{
FS=","
alltime=$1
alldate=$2
tempc=$5
depth=$7
outfile=$6 "_newgps.gps"
declon=$3 * -1
londeg=int(declon)
lonmin=(declon-londeg)*60
declat=$4
latdeg=int(declat)
latmin=(declat-latdeg)*60
printf("$GPRMC,%06d,A,%02d%06.3f,N,%03d%06.3f,W,000.0,0,%06d,0,W*73\n",alltime,latdeg,latmin,londeg,lonmin,alldate) >> outfile
printf("$SDDPT,%s,0.0*56\n",depth) >> outfile
if (tempc != -9999) {
printf("$SDMTW,%s,C*01\n",tempc) >> outfile
}
}
Effectively what this script does is not only format the GPS file, but also output the information to the appropriate filename (which is based on the line name).
Person who carried out this activity:
Are there legal restrictions on access or use of the data?Access_Constraints: None.
Use_Constraints: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.
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.
| Data format: | The WinZip (v. 14) file contains all the raw CRP data from April 14, 2010 as well as the associated metadata files. in format ASCII Size: 1.02 |
|---|---|
| Network links: |
https://pubs.usgs.gov/of/2011/1039/data/resistivity/raw_resis/apr14_raw.zip https://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html https://doi.org/10.3133/ofr20111039 |
The data are provided in a zip compressed file. The user must have software capable of uncompressing the archive. In addition, the raw data are available in a format compatible with AGI Geosciences Marine Log Manager software. The user must have software capable of reading the AGI format in order to process these data.