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7 changes: 4 additions & 3 deletions _sources/content/Modul_2/en_qgis_geodata_concept.md
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Expand Up @@ -240,10 +240,9 @@ Layers in a GIS. Source: [CartONG](https://cartong.pages.gitlab.cartong.org/lear
## Projections
### Introduction

:::{dropdown} Video: Why all world maps are wrong
:open:

<iframe width="560" height="315" src="https://www.youtube.com/embed/kIID5FDi2JQ?si=C0tYz7nteMF_xqvr" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
:::


An important issue when creating a map of a region, is that it is impossible to create a representation of a sphere
on a 2D plane without distorting the map. The transformation of a 3D object onto a flat surface can be done with the help of a __projection__. Over the centuries, cartographers and mathematicians have developed a multitude of different methods to project the earth onto a flat surface. However, it is never possible to correctly represent the world on a flat surface (see the video above).
Expand All @@ -270,6 +269,8 @@ figure below). Furthermore, the further away from the equator you get, the more
The mercator projection is famous for distorting the size of different countries. You can check
the true size in comparison to different placements on the map on [TheTrueSize.com website](https://www.thetruesize.com).
A popular example is Greenland in comparison with Africa, which seem on the map to be about the same size, but in reality Africa is a lot bigger.
:::


```{figure} /fig/en_greenland_africa.png
---
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32 changes: 16 additions & 16 deletions content/GIS_AA/en_qgis_historical_impact_assessment_sudan.html
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20 changes: 10 additions & 10 deletions content/GIS_AA/en_qgis_historical_impact_assessment_sudan_ex1.html
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Expand Up @@ -3349,7 +3349,7 @@ <h2>Task 8: Data export using Pivot-Table in Excel ✅<a class="headerlink" href
<p>We also want to include the Event and Flash-floods as these types can also be associated with flooding events as a result of heavy rainfall, seasonal rainfall, etc.
We also want to make sure that we rename the column containing the sum of the flooding events to <code class="docutils literal notranslate"><span class="pre">Sum</span> <span class="pre">flood</span> <span class="pre">events</span></code>.</p>
<ol class="arabic simple" start="3">
<li><p>Now we export this excel sheet as a CSV file and import it into QGIS. We will open the <code class="docutils literal notranslate"><span class="pre">Data</span> <span class="pre">Source</span> <span class="pre">Manager</span></code> and select the <code class="docutils literal notranslate"><span class="pre">Delimited</span> <span class="pre">Text</span></code> section. Here we need to do the following specifications (<a class="reference internal" href="#hia-import-csv-floods"><span class="std std-numref">Fig. 245</span></a>).</p></li>
<li><p>Now we export this excel sheet as a CSV file and import it into QGIS. We will open the <code class="docutils literal notranslate"><span class="pre">Data</span> <span class="pre">Source</span> <span class="pre">Manager</span></code> and select the <code class="docutils literal notranslate"><span class="pre">Delimited</span> <span class="pre">Text</span></code> section. Here we need to do the following specifications (<a class="reference internal" href="#hia-import-csv-floods"><span class="std std-numref">Fig. 246</span></a>).</p></li>
</ol>
</section>
<section id="task-9-data-visualization-and-analysis-in-qgis">
Expand All @@ -3373,7 +3373,7 @@ <h2>Task 9: Data visualization and analysis in QGIS<a class="headerlink" href="#
<figure class="align-default" id="hia-csv-import">
<a class="reference internal image-reference" href="../../_images/Sudan_HIA_ex_import_csv_impact.png"><img alt="../../_images/Sudan_HIA_ex_import_csv_impact.png" src="../../_images/Sudan_HIA_ex_import_csv_impact.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 242 </span><span class="caption-text">Import of the CSV data impact quantity 2020 on state level</span><a class="headerlink" href="#hia-csv-import" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 243 </span><span class="caption-text">Import of the CSV data impact quantity 2020 on state level</span><a class="headerlink" href="#hia-csv-import" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="2">
Expand All @@ -3393,7 +3393,7 @@ <h2>Task 9: Data visualization and analysis in QGIS<a class="headerlink" href="#
<figure class="align-default" id="hia-join">
<a class="reference internal image-reference" href="../../_images/Sudan_HIA_ex_join_table.png"><img alt="../../_images/Sudan_HIA_ex_join_table.png" src="../../_images/Sudan_HIA_ex_join_table.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 243 </span><span class="caption-text">Join the table information onto the geodata</span><a class="headerlink" href="#hia-join" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 244 </span><span class="caption-text">Join the table information onto the geodata</span><a class="headerlink" href="#hia-join" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="3">
Expand All @@ -3413,36 +3413,36 @@ <h2>Task 9: Data visualization and analysis in QGIS<a class="headerlink" href="#
<figure class="align-default" id="hia-map-houses">
<a class="reference internal image-reference" href="../../_images/en_HIA_map_houses.png"><img alt="../../_images/en_HIA_map_houses.png" src="../../_images/en_HIA_map_houses.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 244 </span><span class="caption-text">Example map of destroyed houses in Sudan 2020</span><a class="headerlink" href="#hia-map-houses" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 245 </span><span class="caption-text">Example map of destroyed houses in Sudan 2020</span><a class="headerlink" href="#hia-map-houses" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<p><strong>Flood events in Sudanese states for all the recorded years</strong></p>
<p>In this section we want to analyse and visualise all recorded flooding events for all the Sudanese state. With our filter for the Impact-Type we derive information for the years 2003 until 2021.</p>
<ol class="arabic simple">
<li><p>Now we impoer the file “Floods_Sudan_all_years” from the input folder. We will open the <code class="docutils literal notranslate"><span class="pre">Data</span> <span class="pre">Source</span> <span class="pre">Manager</span></code> and select the <code class="docutils literal notranslate"><span class="pre">Delimited</span> <span class="pre">Text</span></code> section. Here we need to do the following specifications (<a class="reference internal" href="#hia-import-csv-floods"><span class="std std-numref">Fig. 245</span></a>).</p></li>
<li><p>Now we impoer the file “Floods_Sudan_all_years” from the input folder. We will open the <code class="docutils literal notranslate"><span class="pre">Data</span> <span class="pre">Source</span> <span class="pre">Manager</span></code> and select the <code class="docutils literal notranslate"><span class="pre">Delimited</span> <span class="pre">Text</span></code> section. Here we need to do the following specifications (<a class="reference internal" href="#hia-import-csv-floods"><span class="std std-numref">Fig. 246</span></a>).</p></li>
</ol>
<figure class="align-default" id="hia-import-csv-floods">
<a class="reference internal image-reference" href="../../_images/en_HIA_import_csv_floods.png"><img alt="../../_images/en_HIA_import_csv_floods.png" src="../../_images/en_HIA_import_csv_floods.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 245 </span><span class="caption-text">Import of the CSV data</span><a class="headerlink" href="#hia-import-csv-floods" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 246 </span><span class="caption-text">Import of the CSV data</span><a class="headerlink" href="#hia-import-csv-floods" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="2">
<li><p>The next step follows the same logic as step 2 in the previous example. We will use geodata that contains information about the states of Sudan and join them with the imported CSV data. We will use the <code class="docutils literal notranslate"><span class="pre">Join</span> <span class="pre">attributes</span> <span class="pre">by</span> <span class="pre">field</span> <span class="pre">value</span></code> tool and select the ADM1_PCODE as the table field used for the join. An example is shown in <a class="reference internal" href="#hia-join-floods"><span class="std std-numref">Fig. 246</span></a>.</p></li>
<li><p>The next step follows the same logic as step 2 in the previous example. We will use geodata that contains information about the states of Sudan and join them with the imported CSV data. We will use the <code class="docutils literal notranslate"><span class="pre">Join</span> <span class="pre">attributes</span> <span class="pre">by</span> <span class="pre">field</span> <span class="pre">value</span></code> tool and select the ADM1_PCODE as the table field used for the join. An example is shown in <a class="reference internal" href="#hia-join-floods"><span class="std std-numref">Fig. 247</span></a>.</p></li>
</ol>
<figure class="align-default" id="hia-join-floods">
<a class="reference internal image-reference" href="../../_images/en_HIA_join_floods.png"><img alt="../../_images/en_HIA_join_floods.png" src="../../_images/en_HIA_join_floods.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 246 </span><span class="caption-text">Join the table information onto the geodata</span><a class="headerlink" href="#hia-join-floods" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 247 </span><span class="caption-text">Join the table information onto the geodata</span><a class="headerlink" href="#hia-join-floods" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="3">
<li><p>Now we can visualise our results using <code class="docutils literal notranslate"><span class="pre">Graduated</span></code> and selecting the corresponding column of the attribute table <code class="docutils literal notranslate"><span class="pre">Sum</span> <span class="pre">flood</span> <span class="pre">events</span></code>. Select an appropriate color scheme and start creating your map. Your final product could look like <a class="reference internal" href="#hia-map-floods"><span class="std std-numref">Fig. 247</span></a>.</p></li>
<li><p>Now we can visualise our results using <code class="docutils literal notranslate"><span class="pre">Graduated</span></code> and selecting the corresponding column of the attribute table <code class="docutils literal notranslate"><span class="pre">Sum</span> <span class="pre">flood</span> <span class="pre">events</span></code>. Select an appropriate color scheme and start creating your map. Your final product could look like <a class="reference internal" href="#hia-map-floods"><span class="std std-numref">Fig. 248</span></a>.</p></li>
</ol>
<figure class="align-default" id="hia-map-floods">
<a class="reference internal image-reference" href="../../_images/en_HIA_map_floods.png"><img alt="../../_images/en_HIA_map_floods.png" src="../../_images/en_HIA_map_floods.png" style="height: 500px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 247 </span><span class="caption-text">Example map</span><a class="headerlink" href="#hia-map-floods" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 248 </span><span class="caption-text">Example map</span><a class="headerlink" href="#hia-map-floods" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<div class="admonition note">
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6 changes: 3 additions & 3 deletions content/Mobile_Data_collection/en_SMT.html
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Expand Up @@ -562,7 +562,7 @@ <h2>What is the Sketch Map Tool?<a class="headerlink" href="#what-is-the-sketch-
<figure class="align-left" id="sketch-map-logo">
<a class="reference internal image-reference" href="../../_images/SketchMap_Logo_Top.jpg"><img alt="../../_images/SketchMap_Logo_Top.jpg" src="../../_images/SketchMap_Logo_Top.jpg" style="height: 200px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 248 </span><span class="caption-text">Sketch Map Tool Logo</span><a class="headerlink" href="#sketch-map-logo" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 249 </span><span class="caption-text">Sketch Map Tool Logo</span><a class="headerlink" href="#sketch-map-logo" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<p>The <a class="reference external" href="https://sketch-map-tool.heigit.org/">Sketch Map Tool</a> simplifies participatory mapping, by facilitating the creation and digitisation of paper-based maps, the so-called Sketch Maps. This low-tech solution enables the offline collection of local knowledge and perceptions with pen and paper maps. Every SketchMap contains a basemap with OpenStreetMap data or satellite imagery, which provides a scale and orientation to the user. Upon uploading pictures of marked maps, the tool automatically digitizes and georeferences the markings to download and integrate into Geographic Information Systems. The Sketch Map Tool combines widely used, analogue mapping with digital analysis, fosters community involvement and the usability of gained results.</p>
Expand Down Expand Up @@ -601,7 +601,7 @@ <h2>Introduction in the Workflow Sketch Map Tool<a class="headerlink" href="#int
<figure class="align-center" id="t">
<a class="reference internal image-reference" href="../../_images/SMT_workflow_Satelite.png"><img alt="../../_images/SMT_workflow_Satelite.png" src="../../_images/SMT_workflow_Satelite.png" style="height: 450px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 249 </span><span class="caption-text">Sketch Map Tool workflow</span><a class="headerlink" href="#t" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 250 </span><span class="caption-text">Sketch Map Tool workflow</span><a class="headerlink" href="#t" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
</section>
Expand All @@ -612,7 +612,7 @@ <h2>The Sketch Map Tool and its use in the EVCA<a class="headerlink" href="#the-
<figure class="align-center" id="sketch-map-collaborative-usage-example">
<a class="reference internal image-reference" href="../../_images/IMG_2178.JPG"><img alt="../../_images/IMG_2178.JPG" src="../../_images/IMG_2178.JPG" style="height: 450px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 250 </span><span class="caption-text">Usage of Sketch Map Tool in the context of the Enhanced Vulnerability and Capacity Assessment (EVCA) in Colombia</span><a class="headerlink" href="#sketch-map-collaborative-usage-example" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 251 </span><span class="caption-text">Usage of Sketch Map Tool in the context of the Enhanced Vulnerability and Capacity Assessment (EVCA) in Colombia</span><a class="headerlink" href="#sketch-map-collaborative-usage-example" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<p><strong>For more information on the EVCA:</strong></p>
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12 changes: 6 additions & 6 deletions content/Modul_2/en_data_sources.html
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Expand Up @@ -901,7 +901,7 @@ <h3>QuickOSM plugin<a class="headerlink" href="#quickosm-plugin" title="Permalin
<figure class="align-center" id="choosing-key-and-value">
<a class="reference internal image-reference" href="../../_images/key_value_quickosm.png"><img alt="../../_images/key_value_quickosm.png" src="../../_images/key_value_quickosm.png" style="width: 800px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 40 </span><span class="caption-text">Choosing key and value in QuickOSM.</span><a class="headerlink" href="#choosing-key-and-value" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 41 </span><span class="caption-text">Choosing key and value in QuickOSM.</span><a class="headerlink" href="#choosing-key-and-value" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic" start="2">
Expand All @@ -916,7 +916,7 @@ <h3>QuickOSM plugin<a class="headerlink" href="#quickosm-plugin" title="Permalin
<figure class="align-center" id="running-the-quickosm-plugin">
<a class="reference internal image-reference" href="../../_images/quickosm_usage.png"><img alt="../../_images/quickosm_usage.png" src="../../_images/quickosm_usage.png" style="width: 800px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 41 </span><span class="caption-text">Running the QuickOSM plugin.</span><a class="headerlink" href="#running-the-quickosm-plugin" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 42 </span><span class="caption-text">Running the QuickOSM plugin.</span><a class="headerlink" href="#running-the-quickosm-plugin" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="4">
Expand Down Expand Up @@ -954,7 +954,7 @@ <h3>HOT Export Tool<a class="headerlink" href="#hot-export-tool" title="Permalin
<figure class="align-center" id="id1">
<a class="reference internal image-reference" href="../../_images/hot_export.png"><img alt="../../_images/hot_export.png" src="../../_images/hot_export.png" style="height: 400px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 42 </span><span class="caption-text">The HOT Export Tool.</span><a class="headerlink" href="#id1" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 43 </span><span class="caption-text">The HOT Export Tool.</span><a class="headerlink" href="#id1" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="4">
Expand All @@ -978,7 +978,7 @@ <h3>HOT Export Tool<a class="headerlink" href="#hot-export-tool" title="Permalin
<figure class="align-center" id="hot-export-tool-example">
<a class="reference internal image-reference" href="../../_images/hot_export_example.png"><img alt="../../_images/hot_export_example.png" src="../../_images/hot_export_example.png" style="height: 400px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 43 </span><span class="caption-text">An Example for the HOT Export Tool.</span><a class="headerlink" href="#hot-export-tool-example" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 44 </span><span class="caption-text">An Example for the HOT Export Tool.</span><a class="headerlink" href="#hot-export-tool-example" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="9">
Expand All @@ -988,7 +988,7 @@ <h3>HOT Export Tool<a class="headerlink" href="#hot-export-tool" title="Permalin
<figure class="align-center" id="hot-export-tool-running">
<a class="reference internal image-reference" href="../../_images/hot_export_running.png"><img alt="../../_images/hot_export_running.png" src="../../_images/hot_export_running.png" style="height: 400px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 44 </span><span class="caption-text">The HOT Export Tool is running.</span><a class="headerlink" href="#hot-export-tool-running" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 45 </span><span class="caption-text">The HOT Export Tool is running.</span><a class="headerlink" href="#hot-export-tool-running" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
<ol class="arabic simple" start="10">
Expand All @@ -998,7 +998,7 @@ <h3>HOT Export Tool<a class="headerlink" href="#hot-export-tool" title="Permalin
<figure class="align-center" id="hot-export-tool-done">
<a class="reference internal image-reference" href="../../_images/hot_export_done.png"><img alt="../../_images/hot_export_done.png" src="../../_images/hot_export_done.png" style="height: 400px;" /></a>
<figcaption>
<p><span class="caption-number">Fig. 45 </span><span class="caption-text">Downloading data from HOT Export Tool.</span><a class="headerlink" href="#hot-export-tool-done" title="Permalink to this image">#</a></p>
<p><span class="caption-number">Fig. 46 </span><span class="caption-text">Downloading data from HOT Export Tool.</span><a class="headerlink" href="#hot-export-tool-done" title="Permalink to this image">#</a></p>
</figcaption>
</figure>
</section>
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