Published April 4, 2023 | Version 1

A 5 m topographic wetness index (TWI) across France

  • 1. Université Rennes 2

Description

The topographic wetness index (TWI) characterizes potential soil wetness as a function of the contributing area and local slope. It was derived from the national airborne DTM (RGE ALTI ®) at 5 m spatial resolution, which is available from the website of the French National Geographic Institute (IGN) (https://geoservices.ign.fr/).

Dataset includes:

  • 280 GeoTIFF raster files (TWI_000.tif) projected in the French Lambert-93 system (EPSG code 2154), each file corresponding to a 50 x 50 km tile. The number indicates the tile of interest ;
  • 1 vector tile index at Google Earth format (tile_index.kmz) showing the location of each tile. This file has been created to facilitate download layer only on area of interest.

To reduce storage space and download time, each raster file has been packed at 7-Zip freeware format.

A complete description of the dataset can be found in Panhelleux, L., Rapinel, S., Lemercier, B., Gayet, G., Hubert-Moy, L., 2023. A 5 m dataset of digital terrain model derivatives across mainland France. Data in Brief 109369. https://doi.org/10.1016/j.dib.2023.109369

Files

Files (18.5 GB)

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80.2 MB Download
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80.1 MB Download
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84.6 MB Download
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78.6 MB Download
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74.6 MB Download
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81.2 MB Download
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md5:a3f142c492e4b9a8c20145df339892bd
77.5 MB Download
md5:7fe84d245203a01bf20d7d19180636b3
41.0 MB Download
md5:30eeb8ed5e5d085421b56f34419f598f
595.6 kB Download
md5:ecf2c0932c73e7e99e124b2cc82fedef
6.1 MB Download
md5:01f34c6340253ba8b75c7aa13c7ab9cd
53.9 MB Download
md5:fcd8bf21d35dba38d25458109f8930e2
77.8 MB Download
md5:d4e186ac15bee149ec89f56aece53c8e
85.4 MB Download

Additional details

Related works

Is described by
Journal article: 10.1016/j.dib.2023.109369 (DOI)