- Date: 2004 (process 1 of 12)
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All raw data files were processed with CARIS HIPS (Hydrographic Information Processing System) version 5.3 with the following workflow: a) created vessel configuration file (VCF) for each cruise. Initial roll, yaw, pitch, and x,y,z axis parameters were set to zero. This information was incorporated into the data at the time of collection as the installation parameters. b) created a new project directory for the HIPS data. This data set was broken down by year. The 2000 data was added to the 1999 data and made into one project, but the other years each have their own projects and field sheets. c) raw line files from em3000 software were brought into CARIS conversion wizard. The conversion wizard converts raw data files to HIPS format and saves the files to a project directory. d) each line was evaluated with the navigation editor to clean the vessel's navigation data. Two know jumps in speed were searched for and the position fixes along with the fixes before and after were rejected with interpolation. The lines were also evaluated with attitude editor to view and clean the motion sensor data like heave and roll. e) a tide file was created for each cruise using a model created by Ruoying He in the Ocean Circulation Group at the Univ. of South Florida (see cross reference section for reference). f) All lines were then merged to create position/depth data for each sounding. g) filters were created for each survey and set to: min depth 40 m, max depth 115 m (as requested by researchers), nadir depth 3.2, angle form nadir 65 degrees port and starboard. Filters applied after merging. h) after merging a weighted mean seabed surface (grid) was created at a 5 m resolution. i) ran the statistical surface cleaning. Cleaning by 2 standard deviation 95%, polynomial 1: tilted plane, tile bugger 10%. j) created subset tiles of 500 square meters. Each tile was opened in subset editor to examine and clean soundings in both 2D and 3D. Tiles viewed in subset editor reveal when calibration is necessary or if there is a sound velocity error. k) if needed, a subset was examined with the calibration function to measure parameters like transducer mounting offsets (pitch, roll, heading). The calibration surveys were performed and allowed adjustments of the survey data parameters and modifications were written to the VCF. Survey modifications were as follows: 2000 survey - VCF for both days adjusted to yaw -9.0 and roll 0.35. 2001 survey - VCF for day 249 (9/6/01) adjusted roll to -0.25, for the day 251 adjusted roll to -0.35. 2003 survey: VCF for days 114, 115, and 119 adjusted to delta z +3.5m, for days 114 and 115 roll adjustment to -0.40. l) after adjusting the VCF files all associated lines for each survey were remerged and then regridded. m) grids were exported to x,y,z using the weighted grid to ASCII option selected units of geographic decimal degrees (DD). Five files were exported: PR_00_99_5m.xyz, PR_01_5m.xyz, PR_03_5m.xyz, PR_sw_03_5m.xyz, and PR_gapfill_5m.xyz.
Person who carried out this activity:
Kate T. Ciembronowicz
U.S. Geological Survey
Research Assistant
600 4th Street South
St. Petersburg, FL 33701-4846
(727) 803-8747 x3124 (voice)
(727) 803-2031 (FAX)
kciembro@usgs.gov
- PR_00_99_5m.xyz, PR_01_5m.xyz, PR_03_5m.xyz, PR_sw_03_5m.xyz, and PR_gapfill_5m.xyz
- (process 2 of 12)
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Each of the x,y,z files were run trough Proj4.1 to convert the geographic coordinates to UTM, Zone 17, NAD83.
Person who carried out this activity:
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA 02543-1598
(508) 548-8700 x2251 (voice)
(508) 457-2310 (FAX)
vatnipp@usgs.gov
- (process 3 of 12)
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All the individual Pulley Ridge reprojected bathymetry files were combined into a single x,y,z file called allpr.xyz.
Person who carried out this activity:
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA 02543-1598
(508) 548-8700 x2251 (voice)
(508) 457-2310 (FAX)
vatnipp@usgs.gov
- (process 4 of 12)
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This xyz file was brought into Surfer to create a 5x5 m grid with the bounds xmin: 218042.5, xmax: 237717.5, ymin: 231553.5, ymax: 2767328.5. The gridding parameters were block kriging, linear, slope = 1, aniso = 1,0, radius1=30, radius2=30. Output was sent to allpr_blockkrig.grd.
Person who carried out this activity:
VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA 02543-1598
(508) 548-8700 x2251 (voice)
(508) 457-2310 (FAX)
vatnipp@usgs.gov
Data sources produced in this process:
- (process 5 of 12)
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This grid was then filtered with an 11x11 IDW filter. Blank nodes were ignored. The output grid was allpr_blockkrig_idwfil11x11.grd.
Data sources used in this process:
Data sources produced in this process:
- allpr_blockkrig_idwfil11x11.grd
- (process 6 of 12)
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This grid was then exported to a surfer ASCII grid format filename out_allprfil_asc.grd.
Data sources used in this process:
- allpr_blockkrig_idwfil11x11.grd
Data sources produced in this process:
- (process 7 of 12)
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This surfer ASCII grid was converted to an ArcView ASCII grid using the ArcView 3.3 extension : Surfer extension 2.8 downloaded from the ESRI website. The output filename was out_allprfil_asc.asc.
Data sources used in this process:
Data sources produced in this process:
- (process 8 of 12)
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This ArcView ASCII grid was then imported to ArcView 3.3 and converted to and ESRI binary grid called allpr_fil.
Data sources used in this process:
Data sources produced in this process:
- (process 9 of 12)
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This grid was then cropped to a polygon which removed extraneous lines outside the majority of the data collection area. The resulting grid is allpr_filcrop.
Data sources used in this process:
Data sources produced in this process:
- (process 10 of 12)
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A hillshade of the grid was created with spatial analyst in ArcGIS 9.0 using the default parameters.
- (process 11 of 12)
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Within ArcView 3.3, the extension 'Image Conversion - Georeferencing 2' was used to combine the hillshade and bathymetry grids into a single georeferenced tiff image.
- (process 12 of 12)
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Corel PhotoPaint version 11 was used to convert the 24-bit image to a palleted 8-bit image.