https://geojournalism.org/author/vitor-george/ Best tools for multimedia reporting Sat, 14 Mar 2015 18:23:59 +0000 en-US hourly 1 https://s0.wp.com/i/webclip.png https://geojournalism.org/author/vitor-george/ 32 32 239681374 https://geojournalism.org/2014/10/mixing-shapefiles-and-comma-separated-files-in-qgis/ Vitor George Mon, 13 Oct 2014 22:03:57 +0000 Data Maps Visualization https://geojournalism.oeco.org.br/?p=1078 <p>Introduction The Comma Separated File format, or just CSV, especifies a data type store in a tabular manner. Each line represent a record, and each field is delimited by a comma or another separator character. This format is accepted by popular tools like Excel, LibreOffice and Google Docs, and by most of programming languages. In [&#8230;]</p> <p>The post <a href="https://geojournalism.org/2014/10/mixing-shapefiles-and-comma-separated-files-in-qgis/">Mixing shapefiles and comma-separated files in QGIS</a> appeared first on <a href="https://geojournalism.org">geojournalism.org</a>.</p> <div> <h2 class="summary-item" id="introduction"><a href="#introduction">Introduction</a></h2> <p>The <em>Comma Separated File </em>format, or just CSV, especifies a data type store in a tabular manner. Each line represent a record, and each field is delimited by a comma or another separator character. This format is accepted by popular tools like Excel, LibreOffice and Google Docs, and by most of programming languages. In this tutorial, we are going to learn how to generate a cloropeth map of income of São Paulo residents in QGIS, using a shapefile and a csv file.</p> <div></div> <h2 class="summary-item" id="preparation"><a href="#preparation">Preparation</a></h2> <div>We are going to use data from <a href="https://censo2010.ibge.gov.br/resultados" target="_blank">2010 Brazilian Census</a> made by <a href="https://www.ibge.gov.br/">IBGE</a>. Download this <a href="https://geojournalism.org/?attachment_id=1085" target="_blank">file</a> and expand it at a local directory.</div> <div></div> <div>Download and install <a href="https://qgis.org/en/site/forusers/download.html" target="_blank">QGIS</a>. This tutorial uses version 2.2, but it is possible to follow the steps using 2.0 version.</div> <div></div> <h2 class="summary-item" id="building-the-map"><a href="#building-the-map">Building the map</a></h2> <div>Open QGIS and add a vector layer from file <em>censo-2010-sp-setores.shp:</em></div> <div></div> <div></div> </div> <div><a href="https://geojournalism.org/wp-content/uploads/2014/06/passo-1-en.gif"><img alt="passo-1-en" class="aligncenter wp-image-1114" decoding="async" fetchpriority="high" height="402" src="https://geojournalism.org/wp-content/uploads/2014/06/passo-1-en.gif" width="800"/></a></div> <div></div> <div>Add a delimited layer from file <em>censo-2010-sp-stats.csv:</em></div> <div></div> <div><a href="https://geojournalism.org/wp-content/uploads/2014/06/passo-2-en.gif"><img alt="passo-2-en" class="aligncenter wp-image-1115" decoding="async" height="545" src="https://geojournalism.org/wp-content/uploads/2014/06/passo-2-en.gif" width="800"/></a></div> <div></div> <div>Join the files by specifying a key field at shapefile properties:</div> <div></div> <div><a href="https://geojournalism.org/wp-content/uploads/2014/06/passo-3-en.gif"><img alt="passo-3-en" class="aligncenter wp-image-1116" decoding="async" height="493" src="https://geojournalism.org/wp-content/uploads/2014/06/passo-3-en.gif" width="800"/></a></div> <div></div> <div></div> <div>This union allow creating a style based on csv file data:</div> <div> <a href="https://geojournalism.org/wp-content/uploads/2014/06/passo-4-en.gif"><img alt="passo-4-en" class="aligncenter wp-image-1106" decoding="async" height="645" loading="lazy" src="https://geojournalism.org/wp-content/uploads/2014/06/passo-4-en.gif" width="800"/></a></div> <div></div> <div></div> <h2 class="summary-item" id="the-resulting-map"><a href="#the-resulting-map">The resulting map</a></h2> <div>Now you can add a legend and export the map to have a result like this:</div> <div></div> <div><a href="https://geojournalism.org/wp-content/uploads/2014/06/mapa1.png"><img alt="mapa" class="aligncenter wp-image-1108" decoding="async" height="650" loading="lazy" sizes="auto, (max-width: 460px) 100vw, 460px" src="https://geojournalism.org/wp-content/uploads/2014/06/mapa1.png" srcset="https://geojournalism.org/wp-content/uploads/2014/06/mapa1.png 1240w, https://geojournalism.org/wp-content/uploads/2014/06/mapa1-212x300.png 212w, https://geojournalism.org/wp-content/uploads/2014/06/mapa1-724x1024.png 724w" width="460"/></a></div> <div> <div class="author-shortcodes"> <div class="author-inner"> <div class="author-image"> <img alt="" src="https://geojournalism.org/wp-content/uploads/2015/02/IMG_20140611_130510_-2594441642.jpg"/> <div class="author-overlay"></div> </div> <!-- .author-image --> <div class="author-info"> <a href="https://www.twitter.com/vitor_george" target="_blank"><strong>Vitor George</strong></a> is a transportation engineer, <a href="https://www.github.com/vgeorge" target="_blank">programmer</a> and specialist in open data and geo technologies for the web. He coordinates <a href="https://codigourbano.org">Código Urbano</a> and is a collaborator of <a href="https://www.infoamazonia.org">InfoAmazonia</a>. </div> <!-- .author-info --> </div> <!-- .author-inner --> </div> <!-- .author-shortcodes --></div> <div></div> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"/> <p>The post <a href="https://geojournalism.org/2014/10/mixing-shapefiles-and-comma-separated-files-in-qgis/">Mixing shapefiles and comma-separated files in QGIS</a> appeared first on <a href="https://geojournalism.org">geojournalism.org</a>.</p> 1078