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FetchingData.html
741 lines (651 loc) · 27 KB
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FetchingData.html
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<!doctype html>
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<head>
<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
<title>Fetching Data</title><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; }
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<div id='write' class = 'is-node'><h1><a name="gis-practicum-fetching-data-with-python" class="md-header-anchor"></a><span>GIS Practicum: Fetching data with Python</span></h1><h2><a name="introduction" class="md-header-anchor"></a><span>Introduction</span></h2><p><span>In a previous session, we examined a number of datasets in ArcGIS Pro. We discovered and obtained these datasets a number of ways: direct download from a web link, via ArcGIS online Portal searches, and by linking ArcGIS Online services. Here, we examine how a similar process is done via Python. Our objects in doing so are threefold:</span></p><ol><li><span>Give us more experience learning and using Python as well as with spatial data formats. </span></li><li><span>Obtain the data we need for later analysis in Python.</span></li><li><span>Begin learning spatial data constructs and how they are used in a coding environment.</span></li></ol><p> </p><h2><a name="getting-started" class="md-header-anchor"></a><span>Getting started</span></h2><p><span>We'll again use Jupyter Notebooks hosted on the Duke </span><code>ENVIRON859</code><span> virtual environment. However to access the notebook exercises for this session we'll "clone" them from a GitHub repository. Doing so will require typing in a few simple commands in a Unix BASH command line. Sounds scary, but it's not. Here are the steps we'll follow:</span></p><ol><li><p><span>Open your </span><code>Environ859</code><span> virtual environment: </span><a href='https://vm-manage.oit.duke.edu/containers/environ859' target='_blank' class='url'>https://vm-manage.oit.duke.edu/containers/environ859</a>
<span>This will bring you to the familiar Jupyter Dashboard we used in the last assignment. </span></p></li><li><p><span>Using the </span><code>New▼</code><span> menu, create a new </span><strong><span>Terminal</span></strong><span>. This will open a new web page with a Unix terminal awaiting your command. </span>
<img src="media/UnixTerminal.jpg" style="zoom:100%;" /></p></li><li><p><span>At the terminal, type the following command:</span></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 12px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">git clone https://github.com/DataDevils/FetchingData.git</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 17px;"></div><div class="CodeMirror-gutters" style="display: none; height: 17px;"></div></div></div></pre></li><li><p><span>To close your terminal, just type </span><code>exit</code><span> and then close the window. </span></p></li></ol><p><span>This should have downloaded a new folder called </span><code>FetchingData</code><span> to your Jupyter environment. These are the notebooks we will use for this exercise. </span></p><p> </p><p> </p><p> </p></div>
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