227760AIS Shipping Traffic - Average weekly density of recreational vessels 2012 - 2017 (time aware)Updated by FeedsNodeProcessor100014586nmpilayerund146963082016390520270016390520270- <p>Automatic Identification System (AIS) is a maritime navigation safety communications system adopted by the International Maritime Organization (IMO) to provide vessel information, primarily for the purposes of maritime safety. AIS data are collected by various organisations and can be analysed to provide a source of spatial information about vessel movements within the geographical limits of the system. This layer shows the average weekly shipping density, of recreational vessels, for northern UK at 2km grid resolution, featuring multiple years for NMPi's time-aware functionality.</p>
<p>AIS datasets were sampled from the first seven days of each month, commencing with January, at monthly intervals. The total value for all 12 weeks was divided by 12 to determine the weekly average, therefore decimal values may occur for certain cells. The weekly average was also multiplied by 52 to provide the estimated annual average.</p>
<p> </p>
filtered_html<p>Automatic Identification System (AIS) is a maritime navigation safety communications system adopted by the International Maritime Organization (IMO) to provide vessel information, primarily for the purposes of maritime safety. AIS data are collected by various organisations and can be analysed to provide a source of spatial information about vessel movements within the geographical limits of the system. This layer shows the average weekly shipping density, of recreational vessels, for northern UK at 2km grid resolution, featuring multiple years for NMPi's time-aware functionality.</p>
<p>AIS datasets were sampled from the first seven days of each month, commencing with January, at monthly intervals. The total value for all 12 weeks was divided by 12 to determine the weekly average, therefore decimal values may occur for certain cells. The weekly average was also multiplied by 52 to provide the estimated annual average.</p>
<p> </p>
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- 572nmpi_icon.pngpublic://default_images/nmpi_icon_1.pngimage/png1570911444339655image
- Marine Scotland Information NMPi iconMarine Scotland Information NMPi icon
- NMPI icon 2 - Copyright © Marine ScotlandNMPI icon 2 - Copyright © Marine Scotland
NMPI icon 2 - Copyright © Marine ScotlandMarine Scotland Information NMPi icon205205205205 - 619
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- FishDAC_1788FishDAC_1788
- 749
- 744
- 2012-01-01 00:00:002017-12-31 00:00:00Europe/LondonEurope/Londondatetime
- 2020-10-13 00:00:00Europe/LondonEurope/Londondatetime
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- 1
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- Marine Management Organisation (MMO)Marine Management Organisation (MMO)
- 1
- 2016-07-26 00:00:00Europe/LondonEurope/Londondatetime
- <p>The field names in 2012 dataset were modified to match those in 2013 and later. A field "year" was added to each annual dataset. If necessary, datasets were transformed from ETRS89 to WGS84. The datasets were then merged and then clipped within the bounding box: max x = 15W max y = 64N, min x = 3W min y -54N</p>
filtered_html<p>The field names in 2012 dataset were modified to match those in 2013 and later. A field "year" was added to each annual dataset. If necessary, datasets were transformed from ETRS89 to WGS84. The datasets were then merged and then clipped within the bounding box: max x = 15W max y = 64N, min x = 3W min y -54N</p>
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xsd:dateTimedate_iso8601https://marine.gov.scot/maps/1341