Leaflet section background ok

179-2-select-a-zone-in-leaflet-map.Rmd

@@ -0,0 +1,87 @@
+---
+title: "Most basic background map with R and Leaflet"
+descriptionMeta: "The R leaflet package allows to build interactive maps with R. This post explains how to zoom on a specific part of the map, with explanation and reproducible code."
+descriptionTop: "The R `leaflet` package allows to build interactive [maps](map.html) with R. This post explains how to zoom on a specific part of the map, with explanation and reproducible code."
+sectionText: "Background map section"
+sectionLink: "map.html"
+DataToVizText: "About Maps"
+DataToVizLink: "data-to-viz.com/graph/map.html"
+url: "179-2-select-a-zone-in-leaflet-map"
+output:
+  html_document:
+      self_contained: false    
+      mathjax: default
+      lib_dir: libs
+      template: template_rgg.html
+      css: style.css
+      toc: TRUE
+      toc_float: TRUE
+      toc_depth: 2
+      df_print: "paged"
+---
+
+
+```{r global options, include = FALSE}
+knitr::opts_chunk$set( warning=FALSE, message=FALSE)
+```
+
+<div class="container" style="padding-top: 80px">
+
+
+
+
+<div class = "row">
+
+<div class = "col-md-6  col-sm-12 align-self-center">
+
+The previous [most basic map](179-show-a-map-with-leaflet-r.html) with `leaflet` explains how to show a map with the R `leaflet` package. 
+
+To specify which area of the map you want to display, just specify latitude, longitude and how much you want to zoom in the `setView()` call:
+
+- Longitude (`lng`) goes between -180 (West) and +180 (East).
+- Latitude (`lat`) goes between -90 (South) and +90 (North).
+- Zoom is controled using the `zoom` argument.
+
+</div>
+
+
+<div class = "col-md-6  col-sm-12">
+
+<center><iframe src="HtmlWidget/backgroundMapZoom.html" height="400" width="100%" style="border:none; max-width: 500px"></iframe></center>
+
+</div>
+</div>
+
+<br><br>
+
+```{r, eval=FALSE}
+# Load the library
+library(leaflet)
+
+# Note: if you do not already installed it, install it with:
+# install.packages("leaflet")
+
+# Make the map
+m <- leaflet() %>% 
+  addTiles() %>% 
+  setView( lng = 166.45, lat = -22.25, zoom = 8 )
+m
+
+# save the widget in a html file if needed.
+# library(htmlwidgets)
+# saveWidget(m, file=paste0( getwd(), "/HtmlWidget/backgroundMapZoom.html"))
+```
+
+
+
+
+
+
+</div>
+
+
+
+
+```{r, echo=FALSE}
+htmltools::includeHTML("htmlChunkRelatedMap.html")
+```