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NOAH_geoDB/TI_SARnested (MapServer)

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View Footprint In:   ArcGIS Online Map Viewer

Service Description:

The footprint of bottom trawling was estimated from Vessel monitoring by satellite (VMS) data, linked to the corresponding logbook information (German fleet) or the European fleet register (international fleet), respectively. It is quantified as annual swept area ratio, which is the ratio between the cumulative area touched by trawls and the size of the respective grid cell. Thus, a swept area ratio of 1 means that an area equivalent to the size of the grid cell was fished over one year. Cell sizes were assigned using the nested grid approach, i.e. the resolution depends on the amount of available information (position data) within a spatial grid. We considered the gear-specific footprints of four major gear groups: otter trawls, demersal seines, beam trawls and dredges. Further the swept area ratio is averaged over a period from 2012-2016 and thus represents the overall picture of fishing pressure to the seafloor in those years.

Map Name: Layers


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description:

Service Item Id: 79438aa362a84e54bbfe9698667607d5

Copyright Text: Thünen Institute (TI)

Spatial Reference: 4326  (4326)

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriDecimalDegrees


Document Info: Supports Dynamic Layers: true

MaxRecordCount: 130000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON

Supports Query Data Elements:

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   QueryLegends   Find   Return Updates