Fishing vessel presence, measured in hours per square km. Each asset is the vessel presence for a given flag state and day, with one band for the presence of each gear type.
See sample Earth Engine scripts. Also see the main GFW site for program information, fully interactive visualization maps, and impacts.
渔船的存在，以每平方公里小时衡量。每项资产是某一船旗国和某一天的渔船存在情况，每一种渔具类型的存在都有一个波段。
参见地球引擎脚本样本。也可参见GFW的主网站，了解项目信息、完全互动的可视化地图和影响。
Dataset Availability
2012-01-01T00:00:00 - 2017-01-01T00:00:00
Dataset Provider
Global Fishing Watch
Collection Snippet
ee.ImageCollection("GFW/GFF/V1/vessel_hours")
Resolution
0.01 degrees
Bands Table
| Name | Description | Units |
|---|---|---|
| drifting_longlines | Hours per sq. km of fishing vessel presence with drifting longlines. | hours/sq. km |
| fixed_gear | Hours per sq. km of fishing vessel presence with fixed gear. | hours/sq. km |
| other_fishing | Hours per sq. km of fishing vessel presence with other gear types. | hours/sq. km |
| purse_seines | Hours per sq. km of fishing vessel presence with purse seines. | hours/sq. km |
| squid_jigger | Hours per sq. km of fishing vessel presence with squid jiggers. | hours/sq. km |
| trawlers | Hours per sq. km of fishing vessel presence with trawlers. | hours/sq. km |
影像属性
| Name | Type | Description |
|---|---|---|
| country | String | ISO3 country code of the vessel flag state. For all countries, use “WLD”. |
var dataset = ee.ImageCollection('GFW/GFF/V1/vessel_hours')
.filter(ee.Filter.date('2016-12-01', '2017-01-01'));
var trawlers = dataset.select('trawlers');
var trawlersVis = {
min: 0.0,
max: 5.0,
};
Map.setCenter(130.61, 34.287, 8);
Map.addLayer(trawlers.max(), trawlersVis, 'Trawlers');
使用说明：
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International license. (CC-BY-SA)
数据引用：
Global Fishing Watch, “Tracking the Global Footprint of Fisheries.” Science 361.6378 (2018).