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<p><strong>Welcome to Session 4: First Visualisations on the Digital Earth Africa E-learning Platform! </strong></p>
<p>In this session, you will learn how to use Web GIS services (WMS/WCS/WMTS) to visualise and download DE Africa data, and understand the basic concepts of image composites and spectral indices. We will be using QGIS (an open-source desktop GIS) to connect to DE Africa’s Web Map Services and Web Coverage Services, and to create simple maps. If you are an Esri user, steps are also available for you to follow.</p>
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<p>In this session, you will:</p>
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<li><strong>Connect to DE Africa WMS/WCS services:</strong> Add DE Africa map and coverage layers in QGIS using the provided service URLs.</li>
<li><strong>Visualise time-series layers:</strong> Explore time-enabled (WMS-T) layers and use QGIS’s temporal tools to animate data.</li>
<li><strong>Export or download data:</strong> Use WCS or AWS S3 links to retrieve raw raster data for your area of interest.</li>
<li><strong>Style thematic maps:</strong> Create a thematic map in QGIS from a loaded dataset.</li>
<li><strong>Understand Composites and Indices:</strong> Learn what image composites and spectral indices are (for later sessions).</li>
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<p><strong>Prerequisites:</strong> We assume you have basic GIS experience and QGIS 3.x (latest version) installed on your computer. (QGIS can be downloaded from <a href="https://qgis.org/download/" target="_blank">qgis.org</a>). A stable internet connection is required to access online services. It may help if you have already completed Session 3 (Datasets) to know some DE Africa products.</p>
<p><em><strong><span style="color: #3366ff;">No video for this session.</span> Proceed to the material below to get started.</strong></em></p>
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