2847355Edited by MartynC.100014617layer_information_pageund1469716718147445730900147445730955<p>Maps show number of vessels using class A AIS (vessels &gt;300grt, all passenger ships regardless of size, AIS working and not switched off, position info is accurate) and vessels carrying class B AIS (vessels &lt;300t, fishing vessels, recreational craft). &nbsp;The data have been derived from a UK data set and clipped to outside Scottish waters.</p> <p>AIS (Automatic Identification System) is a carriage requirement for SOLAS vesels and is an integral part of the EU Vessel Traffic Monitoring and Information Directive (2002/59/EC).</p> <p>For full methodology including processing techniques and data outputs please see the MMO1066 reports.</p> <p>There are 11 layers, available with time aware functionality:</p> <ol> <li>All vessel types</li> <li>Cargo vessels</li> <li>Vessels engaged in dredging or underwater operations</li> <li>Fishing vessels</li> <li>High speed craft</li> <li>Military or law enforcement vessels</li> <li>Non-port service craft</li> <li>Passenger vessels</li> <li>Port service craft</li> <li>Recreational vessels</li> <li>Tankers</li> </ol> filtered_html<p>Maps show number of vessels using class A AIS (vessels &gt;300grt, all passenger ships regardless of size, AIS working and not switched off, position info is accurate) and vessels carrying class B AIS (vessels &lt;300t, fishing vessels, recreational craft).  The data have been derived from a UK data set and clipped to outside Scottish waters.</p> <p>AIS (Automatic Identification System) is a carriage requirement for SOLAS vesels and is an integral part of the EU Vessel Traffic Monitoring and Information Directive (2002/59/EC).</p> <p>For full methodology including processing techniques and data outputs please see the MMO1066 reports.</p> <p>There are 11 layers, available with time aware functionality:</p> <ol> <li>All vessel types</li> <li>Cargo vessels</li> <li>Vessels engaged in dredging or underwater operations</li> <li>Fishing vessels</li> <li>High speed craft</li> <li>Military or law enforcement vessels</li> <li>Non-port service craft</li> <li>Passenger vessels</li> <li>Port service craft</li> <li>Recreational vessels</li> <li>Tankers</li> </ol> 84647755AIS map.jpgpublic://AIS map.jpgimage/jpeg1374011471263464imageAIS mapAIS mapAIS sample map © Marine ScotlandAIS sample map © Marine ScotlandAIS map272300272300filtered_html836<p>A combined version of the annual AIS average weekly density datasets created by the Marine Management Organisation (MMO), clipped to northern UK, at a 2km grid resolution. 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. The field headings in the attribute table are: ave_stg_0 - Unknown Vessels; ave_stg_1 - Non-Port service craft; ave_stg_2 - Port service craft; ave_stg_3 - Vessels engaged in dredging or underwater operations; ave_stg_4 - High Speed Craft; ave_stg_5 - Military or Law enforcement; ave_stg_6 - Passenger; ave_stg_7 - Cargo; ave_stg_8 - Tankers; ave_stg_9 - Fishing vessels; ave_stg_10 - Recreational vessels; Weekly_Ave - Weekly Average Density; Yearly_Ave - Estimated annual density.</p> <p>It should be noted that in the underlying data set (if attributes are examined) vessel categories might not always be as expected. For example,&nbsp;ferries&nbsp;may sometimes&nbsp;be classified as 'Passenger' and at other times as 'Cargo' vessels depending on the exact nature of the vessel on a particular route.</p> filtered_html<p>A combined version of the annual AIS average weekly density datasets created by the Marine Management Organisation (MMO), clipped to northern UK, at a 2km grid resolution. 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. The field headings in the attribute table are: ave_stg_0 - Unknown Vessels; ave_stg_1 - Non-Port service craft; ave_stg_2 - Port service craft; ave_stg_3 - Vessels engaged in dredging or underwater operations; ave_stg_4 - High Speed Craft; ave_stg_5 - Military or Law enforcement; ave_stg_6 - Passenger; ave_stg_7 - Cargo; ave_stg_8 - Tankers; ave_stg_9 - Fishing vessels; ave_stg_10 - Recreational vessels; Weekly_Ave - Weekly Average Density; Yearly_Ave - Estimated annual density.</p> <p>It should be noted that in the underlying data set (if attributes are examined) vessel categories might not always be as expected. For example, ferries may sometimes be classified as 'Passenger' and at other times as 'Cargo' vessels depending on the exact nature of the vessel on a particular route.</p> 146191461814582145911459014589145871458614585145841458314588501250135273146161610897860sioc:Itemfoaf:Documentdc:datedc:createdxsd:dateTimedate_iso8601dc:modifiedxsd:dateTimedate_iso8601content:encodedsioc:has_creatorrelfoaf:namesioc:num_repliesxsd:integersioc:last_activity_datexsd:dateTimedate_iso8601https://marine.gov.scot/?q=information/ais-shipping-traffic-average-weekly-density-vessel-typesMartynC0a:6:{s:7:"overlay";i:1;s:16:"ckeditor_default";s:1:"t";s:20:"ckeditor_show_toggle";s:1:"t";s:14:"ckeditor_width";s:4:"100%";s:13:"ckeditor_lang";s:2:"en";s:18:"ckeditor_auto_lang";s:1:"t";}158022847314617publishedpublished551474457309111474457309158022847314617publishedpublished551474457309111474457309158022847314617publishedpublished551474457309111474457309