MERIT Hydro: Supplementary Visualization Layers

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Earth Engine Snippet
dem elevation flow-direction hand hydrography hydrosheds merit river-width upstream-drainage-area


Supplementary visualization layers for MERIT Hydro


556.6 meters


Name Units Description

River channel width at the channel centerlines. River channel width is calculated by the method described in [Yamazaki et al. 2012, WRR], with some improvements/changes on the algorithm. This band was upscaled to 18 arc seconds from the original 3 arc seconds for better visualization at global scale.

upa km^2

Upstream drainage area (flow accumulation area). This band was upscaled to 18 arc seconds from the original 3 arc seconds for better visualization at global scale.

Terms of Use

Terms of Use

Citation to the paper is adequate if you simply use MERIT Hydro. If you asked for help for additional handling/editing of the dataset, or if your research outcome highly depends on the product, the developer would request co-authorship.

MERIT Hydro is licensed under a Creative Commons "CC-BY-NC 4.0" or Open Data Commons "Open Database License (ODbL 1.0)". With a dual license, you can choose an appropriate license for you.

To view a copy of these license, please visit:

  • CC-BY-NC 4.0 license: Non-Commercial Use with less restriction.
  • ODbL 1.0 license: Commectial Use is OK, but the derived data based on MERIT Hydro should be made publicly available under the same ODbL license. For example, if you create a flood hazard map using MERIT Hydro and you would like to provide a COMMERCIAL service based on that, you have to make the hazard map PUBLICLY AVAILABLE under OdBL license.

Note that the above license terms are applied to the "derived data" based on MERIT Hydro, while they are not applied to "produced work / artwork" created with MERIT Hydro (such as figures in a journal paper). The users may have a copyright of the artwork and may assign any license, when the produced work is not considered as "derived data".

By downloading and using the data the user agrees to the terms and conditions of the license. Notwithstanding this free license, we ask users to refrain from redistributing the data in whole in its original format on other websites without the explicit written permission from the authors.

The copyright of MERIT Hydro is held by the developers, 2019, all rights reserved.


  • Yamazaki D., D. Ikeshima, J. Sosa, P.D. Bates, G.H. Allen, T.M. Pavelsky. MERIT Hydro: A high-resolution global hydrography map based on latest topography datasets Water Resources Research, vol.55, pp.5053-5073, 2019, doi:10.1029/2019WR024873

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.Image('MERIT/Hydro_reduced/v1_0_1');

var visualization = {
  bands: 'wth',
  min: 0,
  max: 400

Map.setCenter(90.301, 23.052, 10);

Map.addLayer(dataset, visualization, 'River width');
Open in Code Editor