Cochrane, Guy R. , 2010, all_hab -- habitat polygon for entire region.: Open-File Report 2007-1271, U.S. Geological Survey, Santa Cruz, CA.This is part of the following larger work.Online Links:
Cochrane, Guy R. , Golden, Nadine, Dartnell, Pete, Schroeder, Donna, Conrad, Jamie, and Stevenson, Andy, 2007, Seafloor Mapping and Benthic Habitat GIS for Southern California, Volume III.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
The map projection used is WGS_1984_UTM_Zone_11N.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000032
Ordinates (y-coordinates) are specified to the nearest 0.000032
Planar coordinates are specified in meters
The horizontal datum used is World Geodetic System of 1984.
The ellipsoid used is World Geodetic System 0f 1984.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.2572222.
FID Alias: FID Data type: OID Width: 4 Precision: 0 Scale: 0 Definition: Internal feature number. Definition Source: ESRI Shape Alias: Shape Data type: Geometry Width: 0 Precision: 0 Scale: 0 Definition: Feature geometry. Definition Source: ESRI ID Alias: ID Data type: Number Width: 10 GRIDCODE Alias: GRIDCODE Data type: Number Width: 10 MEGA_ID Alias: MEGA_ID Data type: String Width: 10 BOTTOM_ID Alias: BOTTOM_ID Data type: String Width: 10 MSO_MCR_ID Alias: MSO_MCR_ID Data type: String Width: 10 MDFIR_ID Alias: MDFIR_ID Data type: String Width: 10 SLOPE_ID Alias: SLOPE_ID Data type: String Width: 10 COMPLEX_ID Alias: COMPLEX_ID Data type: String Width: 10 GEO_UNIT Alias: GEO_UNIT Data type: String Width: 10 RUGOSITY Alias: RUGOSITY Data type: Float Width: 13 Number of decimals: 11 Area Alias: Area Data type: Float Width: 19 Number of decimals: 11 HAB_TYPE Alias: HAB_TYPE Data type: String Width: 15 Benthic habitat classification attributes: megahabitat, bottom induration, meso-macrohabitat, and modifiers from Green and others,1999. CODE is a combination of the habitat attributes. MEGA_ID is S for "Shelf". BOTTOM_ID is h for hard bottom, m for mixed hard and soft bottom, or s for soft sediment bottom MSO_MRC_ID are macrohabitats described in Greene and others 1999. MDFR_ID are modifiers to describe the texture or lithology of the seafloor and appear in the code preceded by an underscore (_). Including; anthropogenic (_a).
The authors would like to thank , Jamie Conrad, Hank Chezar and Andy Stevenson of the USGS Western Region Coastal and Marine Geology Program (in Santa Cruz and Menlo Park, CA) for field support and equipment support. Larry Kooker, Mike Boyle, Gerry Hatcher, and Dave Hogg at the USGS Marine Facility (Redwood City, CA) contributed field support and logistical support. The R/V Shearwater was skippered by Terrence Shinn & Luman Moody.
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These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
Channel West polygon processing
**** import ****
Execution date: Thu Oct 26 10:36:41 2006
General file = /work3/ngolden/S105SC/chanwest/cw_normal8.tif
Size (bytes) = 101976908
Output dataset = /work3/ngolden/S105SC/chanwest/chanwest_bck
Image file = /work3/ngolden/S105SC/chanwest/chanwest_bck.img
Size (nl,ns) = 9868,10326
Type = UNSIGNED_BYTE
Parameters selected :
TIFF = Yes
Connect (00:03:13.00)
CPU (00:00:01.62)
Direct I/O (24941)
Page faults (565)
**** texscal ****
Program: TexScal vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
Process Started 10/26/2006 11:12:03
W = 5, D = 1 wd=6 wd2=3
Input matrix filename chanwest_bck.img
LINES: 9868 SAMPLES: 10326
Valid pixels processed: 93326504.000000
bmin = 0 bmax = 255
emin = 0.000000 emax = 5.273059 hmin = 0.000000 hmax = 1.977539
entropy correction = 48.169384 homogeneity correction = 128.442469
Process Finished 10/26/2006 15:07:21
**** texgen ****
Program TexGen vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
10/27/2006 10:03:33
Input Matrix filename: chanwest_bck.img
Entropy minimum value: 0.000000
Homogeneity minimum value: 0.000000
Entropy correction value: 48.169384
Homogeneity correction value: 128.442469
Output Entropy filename: chanwest_bckent.img
Output Homogeneity filename: chanwest_bckhom.img
LINES: 9868 SAMPLES: 10326
W = 5 D = 1
Valid pixels processed: 93326504.000000
**** export ****
Execution date: Wed Nov 1 11:34:36 2006
Input dataset = /work3/ngolden/S105SC/chanwest/chanwest_bckhom
Image file = /work3/ngolden/S105SC/chanwest/chanwest_bckhom.img
Size (nl,ns) = 9868,10326
Type = UNSIGNED_BYTE
General file = /work3/ngolden/S105SC/chanwest/chanwest_bckhom.tiff
Size (bytes) = 101898804
Parameters selected :
TIFF = Yes
Connect (00:00:36.00)
CPU (00:00:01.76)
Direct I/O (24918)
Page faults (565)
Channel Central polygon processing
**** import ****
Execution date: Fri Nov 3 15:42:22 2006
General file = /work3/ngolden/S105SC/chancen/cc_remap13.tif
Size (bytes) = 123512332
Output dataset = /work3/ngolden/S105SC/chancen/chancen_bck
Image file = /work3/ngolden/S105SC/chancen/chancen_bck.img
Size (nl,ns) = 10665,11573
Type = UNSIGNED_BYTE
Parameters selected :
TIFF = Yes
Connect (00:00:43.00)
CPU (00:00:02.09)
Direct I/O (18503)
Page faults (565)
**** texscal ****
Program: TexScal vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
Process Started 11/03/2006 15:47:18
W = 5, D = 1 wd=6 wd2=3
Input matrix filename chancen_bck.img
LINES: 10665 SAMPLES: 11573
Valid pixels processed: 91168513.000000
bmin = 0 bmax = 254
emin = 2.394907 emax = 5.374854 hmin = 0.025459 hmax = 1.977539
entropy correction = 85.236398 homogeneity correction = 130.117613
Process Finished 11/03/2006 19:38:00
**** texgen ****
Program TexGen vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
11/06/2006 10:17:30
Input Matrix filename: chancen_bck.img
Entropy minimum value: 2.394907
Homogeneity minimum value: 0.025459
Entropy correction value: 85.236398
Homogeneity correction value: 130.117613
Output Entropy filename: chancen_bckent.img
Output Homogeneity filename: chancen_bckhom.img
LINES: 10665 SAMPLES: 11573
W = 5 D = 1
Valid pixels processed: 91168513.000000
**** export ****
Execution date: Mon Nov 6 16:44:37 2006
Input dataset = /work3/ngolden/S105SC/chancen/chancen_bckhom
Image file = /work3/ngolden/S105SC/chancen/chancen_bckhom.img
Size (nl,ns) = 10665,11573
Type = UNSIGNED_BYTE
General file = /work3/ngolden/S105SC/chancen/chancen_bckhom.tiff
Size (bytes) = 123427881
Parameters selected :
TIFF = Yes
Connect (00:00:53.00)
CPU (00:00:02.49)
Direct I/O (30165)
Page faults (565)
Channel East polygon processing
**** import ****
Execution date: Fri Nov 3 15:00:17 2006
General file = /work3/ngolden/S105SC/chaneast/ce_remap11.tif
Size (bytes) = 208097504
Output dataset = /work3/ngolden/S105SC/chaneast/chancen_bck
Image file = /work3/ngolden/S105SC/chaneast/chancen_bck.img
Size (nl,ns) = 15802,13161
Type = UNSIGNED_BYTE
Parameters selected :
TIFF = Yes
Connect (00:00:37.00)
CPU (00:00:03.75)
Direct I/O (48115)
Page faults (565)
**** texscal ****
Program: TexScal vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
Process Started 11/03/2006 15:04:22
W = 5, D = 1 wd=6 wd2=3
Input matrix filename chaneast_bck.img
LINES: 15802 SAMPLES: 13161
Valid pixels processed: 134191682.000000
bmin = 0 bmax = 255
emin = 2.309626 emax = 5.225893 hmin = 0.031782 hmax = 1.977539
entropy correction = 87.097644 homogeneity correction = 130.540464
Process Finished 11/03/2006 20:39:12
**** texgen ****
Program TexGen vers. 2e
USGS Guy R. Cochrane gcochrane@usgs.gov
11/06/2006 10:24:25
Input Matrix filename: chaneast_bck.img
Entropy minimum value: 2.309626
Homogeneity minimum value: 0.031782
Entropy correction value: 87.097644
Homogeneity correction value: 130.540464
Output Entropy filename: chaneast_bckent.img
Output Homogeneity filename: chaneast_bckhom.img
LINES: 15802 SAMPLES: 13161
W = 5 D = 1
Valid pixels processed: 134191682.000000
**** export ****
Execution date: Mon Nov 6 17:07:20 2006
Input dataset = /work3/ngolden/S105SC/chaneast/chaneast_bckent
Image file = /work3/ngolden/S105SC/chaneast/chaneast_bckent.img
Size (nl,ns) = 15802,13161
Type = UNSIGNED_BYTE
General file = /work3/ngolden/S105SC/chaneast/chaneast_bckent.tiff
Size (bytes) = 207971958
Parameters selected :
TIFF = Yes
Connect (00:00:49.00)
CPU (00:00:04.31)
Direct I/O (50809)
Page faults (565)
Processing for all habitat polygon regions:
1. ArcGIS "Create Signatures Tool":
Created signature polygon file
by identifying areas of verified (through video observation)
hard, mixed, and soft bottom.
Used 7 layer in the in the "stack" of files to create signatures.
Layers included:
-euclidean distance grid of track lines.
-mosaiced backscatter at 2 meter resolution
-enthropy from backscatter at 2 meter resolution
-homogeneity of backscatter at 2 meter resolution
-rugosity (derived from mosaiced bathy
using the "Benthic Terrain Modeling Tool's Rugosity Builder")
-enthropy from backscatter at half meter resolution
-homogeneity of backscatter at half meter resolution
2. Using the output from the first round of the ArcGIS "Create Signatures Tool",
added 2 additional classes: nadir rock and nadir mixed.
Used same above 7 layers and re-ran "Create Signatures Tool".
Using the new output file, assigned classes nadir rock and nadir mixed
to signature "soft".
3. Converted 3 class grid to polygon.
Decreased number of polygon attributes by grouping polygons
of like classification if polygons area less or equal to 10 sq meters.
Added all Green habitat code (1999) ID and definition columns to polygons.
Used select by attribute, location, and manual tools
to query and assign Green habitat code attributes.
Habitat polygons dervived in ArcGIS 9.1 from a georefereced sidescan sonar mosaic tiff.
Highly variable on the order of 10 meters.
%100 of data classified for: gravel, sand, silt, clay, and fine grain for 1144 samples
No additional checks for topological consistency were performed on this data.
Are there legal restrictions on access or use of the data?
(831) 427-4754 (voice)
(831) 427-4748 (FAX)
gcochrane@usgs.gov
Although this data set has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.
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