Vessel Density - Sacramento-San Joaquin Delta [ds2882]

SDE Raster Dataset

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Tags
vessel density, vessel type, AIS, Sacramento-San Joaquin Delta


Summary

This dataset contains vessel density grids for the Sacramento-San Joaquin Delta for the years 2011, 2013, 2015-2019 based on refined Automatic Identification System (AIS) data that are collected by the U.S. Coast Guard. From MarineCadastre website (https://marinecadastre.gov/ais/): "Automatic Identification System (AIS) data are collected by the U.S. Coast Guard through an onboard navigation safety device that transmits and monitors the location and characteristics of large vessels in U.S. and international waters in real time. The Bureau of Ocean Energy Management (BOEM) and the National Oceanic and Atmospheric Administration (NOAA) have worked jointly to repurpose and make available some of the most important records from the U.S. Coast Guards national network of AIS receivers. Information such as location, time, ship type, speed, length, beam, and draft have been extracted from the raw data and prepared for analyses in desktop GIS software. BOEM and NOAA have also worked together to build a collection of tools and instructional materials. These are designed to help analysts process the data and derive products that improve offshore site analysis, use-conflict studies, and the understanding of marine transportation patterns." According to Marinecadastre.gov, AIS data only account for 50-60% of vessel traffic furthermore, data are only required for larger passenger, tug, container, and tanker vessels while recreational, fishing, and military boats are not usually tracked . Additional information on caveats and AIS requirements can be found on the Marinecadastre AIS webpage: https://marinecadastre.gov/news/load.php?url=posts/automatic-identification-system.html See related dataset, Vessel Transit Count - Sacramento-San Joaquin Delta [ds2881].

Description

From AIS Vessel Tracks 2019 Metadata ( https://inport.nmfs.noaa.gov/inport/item/59927 ) :

" A vessel track shows the location and characteristics of commercial and recreational boats as a sequence of positions transmitted by an Automatic Identification System (AIS). AIS signals are susceptible to interference and this can result in a gap within a vessel track. The distribution, type, and frequency of vessel tracks are a useful aid to understanding the risk of conflicting uses within a certain geographic area. The vessel track positions in this data set are collected and recorded from land-based antennas as part of a national network operated by the U.S. Coast Guard. "

Geospatially explicit boating data for the Sacramento-San Joaquin Delta could be used to inform restoration and recreation planning. Prior studies have used survey and boating counts to determine boating numbers and preferred routes. In this study, Automatic Identification System (AIS) data, collected by the US Coast Guard (USCG) were used to provide a spatially explicit picture of boating routes. AIS data has been used for a variety of coastal planning purposes. This study indicates the relevance of AIS data for planning in the Sacramento-San Joaquin Delta.

AIS data from 2015-2017 was downloaded from the NOAA Marine Cadastre site using an R script. The same script cleaned the data and readied it for processing with ArcGIS Pro using NOAA s AIS CSV to File Geodatabase tool. Once in the geodatabase format, the data was input into another NOAA AIS Trackbuilder tool. Lastly, the constructed tracks were analyzed using the NOAA AIS Vessel Transit Counter tool to construct vessel density maps. The 2011, 2013, 2018, and 2019 data was downloaded as pre-constructed tracklines by month. Months were merged by year, then the NOAA AIS Vessel Transit Counter tool was used to construct vessel density maps. Finally, vessel density data for years 2011, 2013, 2015-2019 were merged, summing cell values.

Credits

Bureau of Ocean Energy Management (BOEM) and National Oceanic and Atmospheric Administration (NOAA). MarineCadastre.gov. AIS Vessel Tracks 2019, 7/14/20 AIS Vessel Tracks 2018, 7/14/20 AIS Vessel Tracks 2013, 7/24/20 AIS Vessel Tracks 2011, 7/24/20 2017 Vessel Counts: All Vessels, 8/2/19 2016 Vessel Counts: All Vessels, 8/2/19 2015 Vessel Counts: All Vessels, 8/2/19 from marinecadastre.gov/data.

Use limitations

Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.

Extent

West -122.177317 East -121.012382
North 38.812739 South 37.610042

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

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource inlandWaters, transportation


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

Place keywords Sacramento-San Joaquin Delta, California

Theme keywords vessel density, vessel type, AIS

Citation

Title Vessel Density - Sacramento-San Joaquin Delta [ds2882]
Publication date 2020-09-1400:00:00


Presentation formats * digital table


Citation Contacts

Responsible party
Individual's name MarineCadastre.gov Data Steward
Organization's name NOAA Office for Coastal Management
Contact's role originator


Contact information


Responsible party
Individual's name Alejo Kraus-Polk
Organization's name UC Davis
Contact's role point of contact


Contact information
Phone
Voice 510 384-4502

Address
Type
e-mail address akrauspolk@ucdavis.edu



Resource Details

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


Spatial representation type * grid


* Processing environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1.7333


Credits
Bureau of Ocean Energy Management (BOEM) and National Oceanic and Atmospheric Administration (NOAA). MarineCadastre.gov. AIS Vessel Tracks 2019, 7/14/20 AIS Vessel Tracks 2018, 7/14/20 AIS Vessel Tracks 2013, 7/24/20 AIS Vessel Tracks 2011, 7/24/20 2017 Vessel Counts: All Vessels, 8/2/19 2016 Vessel Counts: All Vessels, 8/2/19 2015 Vessel Counts: All Vessels, 8/2/19 from marinecadastre.gov/data.
ArcGIS item properties
* Name DS2882_20200729_wm
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -122.177317
* East longitude -121.012382
* North latitude 38.812739
* South latitude 37.610042
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -13600716.717293
* East longitude -13471036.717293
* South latitude 4524483.395778
* North latitude 4694883.395778
* Extent contains the resource Yes

Resource Points of Contact

Point of contact
Individual's name Alejo Kraus-Polk
Organization's name UC Davis
Contact's role point of contact


Contact information
Phone
Voice 510 384-4502

Address
Type
e-mail address akrauspolk@ucdavis.edu



Resource Maintenance

Resource maintenance
Update frequency not planned


Resource Constraints

Constraints
Limitations of use

Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these 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 8.8(9.3.1.2)


Geoprocessing history

Process
Date 2020-09-1508:16:58
Tool location c:\program files (x86)\arcgis\desktop10.5\ArcToolbox\Toolboxes\Data Management Tools.tbx\ProjectRaster
Command issued
Include in lineage when exporting metadata No


Process
Date 2020-09-1508:17:49
Tool location c:\program files (x86)\arcgis\desktop10.5\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyRaster
Command issued
Include in lineage when exporting metadata No


Distribution

Distribution format
* Name SDE Raster Dataset


Transfer options
Online source
Location https://wildlife.ca.gov/Data/BIOS
Function performed information

Online source
Location ftp://ftp.wildlife.ca.gov/BDB/GIS/BIOS/Public_Datasets/2800_2899/ds2882.zip
Function performed download

Online source
Location https://marinecadastre.gov/
Function performed information

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 2020-09-15


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


Created in ArcGIS for the item 2020-08-2115:18:36
Last modified in ArcGIS for the item 2020-09-1508:17:48


Automatic updates
Have been performed Yes
Last update 2020-09-1508:17:48


Metadata Contacts

Metadata contact
Individual's name Alejo Kraus-Polk
Organization's name UC Davis
Contact's role point of contact


Contact information
Phone
Voice 510 384-4502

Address
e-mail address akrauspolk@ucdavis.edu



Metadata Maintenance

Maintenance
Update frequency not planned


Thumbnail and Enclosures