The map shows the data availability on marine and riverine litter. To select environment (water, floor and shoreline) and size interval (micro- or macro-litter), use "Map and Tools" and "Marine litter" tab at the top right. Micro- and macro-litter are split by a threshold of about 2 cm. To zoom and move on the map, use the touchpad or the pointing device. By selecting the points on the map and clicking on the data id number, the source and the sampling method are displayed.