Add Drew's video and mark's guide

Author: libjohn

docs/01_georeference.html

@@ -328,12 +328,13 @@
 
 <p> </p>
 <p><a href="/slides/"><strong>Slides</strong></a></p>
+<p><a href="https://guides.library.duke.edu/r-geospatial">Guide to geospatial applications using the R programming language</a></p>
 <p><a href="https://github.com/libjohn/map-spring2019">Code for Hands-on Workshop – Spring 2019</a></p>
 <div id="overview" class="section level2">
 <h2>Overview</h2>
 <p>These learning and quick-reference resource pages support the face-to-face workshop, <a href="https://rfun.library.duke.edu/portfolio/mapping_workshop/">Mapping with R</a>, offered via the <a href="https://library.duke.edu/data/">Data &amp; Visualization Services</a> Department, Duke University Libraries. The exercises and workshop are designed to help you learn georeferencing, make a <a href="https://en.wikipedia.org/wiki/Choropleth_map">choropleth</a> with USA census data via the <a href="https://walkerke.github.io/tidycensus/">tidycensus</a> package, and briefly introducing the <a href="http://r-spatial.github.io/sf/">sf</a> package, simple features.</p>
 <div class="picture1">
-<iframe width="450" height="315" src="https://www.youtube.com/embed/np38vEHSxLU" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen>
+<iframe height="315" width="500" src="https://warpwire.duke.edu/w/JZ8EAA/" frameborder="0" scrolling="0" allow="autoplay; encrypted-media; fullscreen;  picture-in-picture;" allowfullscreen>
 </iframe>
 </div>
 <p>During the Workshop we introduce</p>

docs/02_choropleth.html

@@ -7,14 +7,17 @@ output:
 
 [**Slides**](/slides/)
 
+[Guide to geospatial applications using the R programming language](https://guides.library.duke.edu/r-geospatial)
+
 [Code for Hands-on Workshop -- Spring 2019](https://github.com/libjohn/map-spring2019)
 
 ## Overview
 
 These learning and quick-reference resource pages support the face-to-face workshop, [Mapping with R](https://rfun.library.duke.edu/portfolio/mapping_workshop/), offered via the [Data & Visualization Services](https://library.duke.edu/data/) Department, Duke University Libraries. The exercises and workshop are designed to help you learn georeferencing, make a  [choropleth](https://en.wikipedia.org/wiki/Choropleth_map) with USA census data via the [tidycensus](https://walkerke.github.io/tidycensus/) package, and briefly introducing the [sf](http://r-spatial.github.io/sf/) package, simple features. 
 
 <div class = "picture1">
-<iframe width="450" height="315" src="https://www.youtube.com/embed/np38vEHSxLU" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
+<iframe height="315" width="500" src="https://warpwire.duke.edu/w/JZ8EAA/" frameborder="0" scrolling="0" allow="autoplay; encrypted-media; fullscreen;  picture-in-picture;" allowfullscreen></iframe>
+
 </div>
 
 During the Workshop we introduce