DOI: 10.16904/envidat.562
title: Invasive neophytes along national roads

description: Streets and Highways are important corridors for the spread of invasive plant species. On behalf of the **Federal Roads Office, FEDRO**, WSL surveyed the national road network in 2021 and recorded the distribution of three invasive neophytes using **AI-based species recognition** in a total of **3.8 million georeferenced images**. The mapped species are the **tree of heaven *(Ailanthus altissima)***, **common ragweed *(Ambrosia artemisiifolia)*** and **narrow-leaved ragweed *(Senecio inaequidens)***.
The data here is part of the **FEDRO documentation** and shows the mapping results as images and interactive maps. The interactive maps are - technically speaking - **self-contained HTML files** that can be displayed with standard web browsers. To reduce the file size, the downloads are provided in zip format.
**License**: This is not an independent data publication by WSL. The data was published together with the written document Trocmé et al. 2023, **© FEDRO 2023** (see related publication: © ASTRA 2023, Abdruck - ausser für kommerzielle Nutzung - unter Angabe der Quelle gestattet).
description: Resource Title: Ambrosia_NS2021.html.zip
 Size: 33508731 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/d363c4f7-7b3d-4a57-b562-1c5559bd41ff/download/ambrosia_ns2021.html.zip
 Description: Detected occurrences of Ambrosia artemisiifolia along Swiss national roads. Self-contained HTML file with an interactive map that can be displayed with standard web browsers. Species occurrences of the middle and side strips can be displayed separately.
description: Resource Title: Ambrosia_NS2021_kmeans4.png
 Size: 1521894 bytes
 Format: image/png
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/c650fa91-2152-4e14-9fa2-06be231faad4/download/ambrosia_ns2021_kmeans4.png
 Description: Generalized map of detected Ambrosia artemisiifolia occurrences along Swiss national roads.
description: Resource Title: Senecio_NS2021.html.zip
 Size: 51366008 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/9160b659-6414-48a1-ac72-875c7ff1cb8e/download/senecio_ns2021.html.zip
 Description: Detected occurrences of Senecio inaequidens along Swiss national roads. Self-contained HTML file with an interactive map that can be displayed with standard web browsers. Species occurrences of the middle and side strips can be displayed separately.
description: Resource Title: Senecio_NS2021_kmeans4.png
 Size: 1517263 bytes
 Format: image/png
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/47ab7392-e462-47cb-a5b1-dca1e2b1bff3/download/senecio_ns2021_kmeans4.png
 Description: Generalized map of detected Senecio inaequidens occurrences along Swiss national roads.
description: Resource Title: Ailanthus_ns2021.html.zip
 Size: 48932476 bytes
 Format: application/zip
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/d3774833-80dd-454c-8e90-12662f908d2a/download/ailanthus_ns2021.html.zip
 Description: Detected occurrences of Ailanthus altissima along Swiss national roads. Self-contained HTML file with an interactive map that can be displayed with standard web browsers. Species occurrences of the middle and side strips can be displayed separately.
description: Resource Title: Ailanthus_ns2021_kmeans4.png
 Size: 1514672 bytes
 Format: image/png
 URL: https://www.envidat.ch/dataset/10898fd0-af14-464c-8b27-aeb2806bc6f9/resource/c38d612c-7ea1-4b01-81c3-08169e101238/download/ailanthus_ns2021_kmeans4.png
 Description: Generalized map of detected Ailanthus altissima occurrences along Swiss national roads.