Halibut Change Analysis - Commercial Fishery - Central Region [ds1085]

SDE Raster Dataset

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Tags
Marine Protected Area (MPA), halibut, fishing, socioeconomic, baseline monitoring, Marine Life Protection Act (MLPA), monitoring, spatial change, biota, location, California Central Coast, California


Summary

The primary goal of this project was to collect up-to-date information on historical trends, current socioeconomic conditions, and the spatial distribution and relative economic value of key commercial fisheries and the commercial passenger fishing vessel fleet in the Central Coast Region.

Description

This data set is a part of Ecotrust's project entitled: Establishing a Baseline and Assessing Spatial and Socioeconomic Change in the California Central Coast Commercial and CPFV Fisheries. This project is a component of the California Central Coast Marine Protected Area Baseline Monitoring Project that is designed to characterize the ecological and socioeconomic conditions and changes within the Central Coast Region since MPA implementation. The Central Coast study region extends from the north at Pigeon Point to the south at Point Conception. These data depict the spatial change in the stated relative value of commercial fishing grounds difference for spatial fisheries data collected in the spring of 2012 (post-MPAs) and summer of 2005 (pre-MPAs). Specifically, the data were calculated by subtracting the post-MPA relative value surface data from the pre-MPA relative value surface data (x = pre-MPA - post-MPA). It is important to emphasize that only the relative value surface (also known as a 'heat map') that was developed for the pre and post MPA data sets were used in these analyses. In other words, ex-vessel revenue was not applied to the 'heat map' value surfaces, however ex-vessel revenue was used to weight and the aggregation of individual fishing grounds. This was done to reduce the number of variables which would influence analysis results. Thus, results are simply an examination of changes in the stated values/importance of fishing areas to a fishery?not spatial changes in revenue across the two datasets. The data ranges from negative to positive values on a relative scale. In this dataset the areas with negative values are areas where the post-MPA fishing values are greater than the pre-MPA values, thus an increase in relative importance and value between the 2005 survey to the 2012 survey. This dataset represents the spatial change in relative value for California halibut--hook and line commercial fishing grounds for the Central Coast Region.

Credits

Use limitations

Contact Ecotrust about using this data.

Extent

West -122.481910 East -120.462497
North 37.302753 South 34.405571

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Content type Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords California Central Coast, California

Theme keywords Marine Protected Area (MPA), Marine Life Protection Act (MLPA), fishing, socioeconomic, baseline monitoring, monitoring, spatial change, halibut

Theme keywords biota, location

Thesaurus
Title ISO 19115 Topic Category




Citation

Title Halibut Change Analysis - Commercial Fishery - Central Region [ds1085]
Publication date 2012-07-3000:00:00
Indeterminate date unknown


Presentation formats * digital table


Citation Contacts

Responsible party
Organization's name Ecotrust
Contact's role originator


Responsible party
Individual's name Charles Steinback
Organization's name Ecotrust
Contact's position Director, Marine Spatial Planning
Contact's role point of contact


Contact information
Phone
Voice (503) 467-0777

Address
Type both
Delivery point 721 NW 9th Ave.
Delivery point Ste. 200
City Portland
Administrative area OR
Postal code 97209
Country US
e-mail address charles@ecotrust.org



Resource Details

Dataset languages English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Status completed
Spatial representation type * grid


* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.1.3497


ArcGIS item properties
* Name Halibut Change Analysis - Commercial Fishery - Central Region [ds1085]
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Description
ground condition
Temporal extent
Date and time 2012-01-01

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -122.481910
* East longitude -120.462497
* North latitude 37.302753
* South latitude 34.405571
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -13634623.824174
* East longitude -13409823.824174
* South latitude 4083391.149898
* North latitude 4481391.149898
* Extent contains the resource Yes

Resource Maintenance

Resource maintenance
Update frequency as needed


Resource Constraints

Constraints
Limitations of use

Contact Ecotrust about using this data.


Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 148923141.92838538
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.00020000000000000001
M tolerance 0.00020000000000000001
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 8.2.6


Spatial Data Properties

ArcGIS Raster Properties
General Information
* Pixel depth 32
* Compression type None
* Number of bands 1
* Raster format AIG
* Source type continuous
* Pixel type floating point
* No data value -3.4028235e+038
* Has colormap No
* Has pyramids Yes




Data Quality

Scope of quality information
Resource level dataset




Data quality report - Quantitative attribute accuracy
Measure description
Data was derived from interviews with fishermen and each fisherman gave boundaries to their fishing grounds and the value attributed to those grounds. Not all fishermen have the same method for describing their fishing areas, so there is variability in the results. Some fishermen would give very detailed areas and other fishermen would give less detailed areas.




Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
All data is overlaid on NOAA nautical charts, with all layers sharing the same projection.




Lineage

Process step
Description
Updated the pre-MPA and post-MPA data for each port and region wide data set so the null values were equal to zero.




Process step
Description
Made a list of comparable data based on participation.




Process step
Description
Used the raster calculator to subtract post-MPA data from the pre-MPA data(x=pre-MPA - post-MPA).




Process step
Description
Trimmed the raster product to the full extent of both pre-MPA and post-MPA fishery area.




Distribution

Distribution format
* Name SDE Raster Dataset


Transfer options
Online source
Location http://bios.dfg.ca.gov/
Function performed information

Online source
Location http://oceanspaces.org/data/assessing-spatial-and-socioeconomic-change-central-coast-commercial-and-cpfv-fisheries-final
Description Reports
Function performed information

Online source
Location http://oceanspaces.org/data/rocky-habitat-analysis-spatial-change-analysis-spatial-data-sets-available-and-recommendations
Description Download
Function performed download

Online source
Location ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/1000_1099/ds1085.zip
Description Download
Function performed download

Fields

Details for object Value
Definition
Negative values are areas where the post-MPA fishing values are greater than the pre-MPA values, thus an increase in relative importance and value between the 2005 survey to the 2012 survey


Metadata Details

Metadata language English(UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata dataset
Scope name * dataset


* Last update 2015-01-14


ArcGIS metadata properties
Metadata format ArcGIS1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2014-12-1117:07:09
Last modified in ArcGIS for the item 2015-01-1408:38:03


Automatic updates
Have been performed Yes
Last update 2015-01-1408:38:03

Item location history
Item copied or moved 2014-12-1117:07:09
From P:\WorkArea\HoldItems\Marine\MPA\Baseline_CC\OceanSpacesArchive\Ecotrust\Spatial Data Sets and Maps\Data\COM\COM_SpatialChange\chal_all
To \\geodata.\\ds1000-1099\ds1085-\v1\v1_source\chal_all


Metadata Contacts

Metadata contact
Individual's name Charles Steinback
Organization's name Ecotrust
Contact's position Director, Marine Spatial Planning
Contact's role point of contact


Contact information
Phone
Voice (503) 467-0777

Address
Type both
Delivery point 721 NW 9th Ave.
Delivery point Ste. 200
City Portland
Administrative area OR
Postal code 97209
Country US
e-mail address charles@ecotrust.org



Metadata Maintenance

Maintenance
Update frequency not planned


Thumbnail and Enclosures

Enclosure
Enclosure type File
Description of enclosure original metadata
Original metadata document, which was translated yes
Source metadata format fgdc