RGIS4_webAPIs_part1_geocoding.Rmd

---
title: "Web APIs and the Basics of Getting Internet Data"
author: "Nick Eubank"
output:
  html_document:
    toc: true
    toc_depth: 4
    theme: spacelab
    mathjax: default
    fig_width: 6
    fig_height: 6
---


```{r knitr_init, echo=FALSE, cache=FALSE, message=FALSE,results="hide"}
library(knitr)
library(rmdformats)
## Global options
options(max.print="75")
opts_chunk$set(echo=TRUE,
	             cache=TRUE,
               prompt=FALSE,
               tidy=TRUE,
               comment=NA,
               message=FALSE,
               warning=FALSE)
opts_knit$set(width=75)


```

***

This tutorial introduces the idea of a Web API -- a special way of getting information from services like google maps or twitter. Web APIs are often useful in GIS analysis for a number of tasks, like converting street addresses or town names into latitudes and longitudes, or downloading census data from R.  

This tutorial also provides some background in the hopes of demystifying the API, whose name suggests a sophisticated tool that those with limited programming experience may find daunting, but which are often just stripped down versions of the web-pages you are used to using. 

***




```{r}
library(ggmap)
geocode(c("1600 Pennsylvania NW, Washington, DC", "denver, co"), source="google", output = "more")
```

## 2.2 US Census API



# 3. Web-Formats

OK, so what is JSON?



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