frame.segments

This data set transforms Dodson and Tobler's street data to give each straight line segment of a "road" a unique ID.

datasets

Amends errors, augments data and aids analysis of John Snow's map
of the 1854 London cholera outbreak.

Peter Li 

cholera

Amend, Augment and Aid Analysis of John Snow's Cholera Map

frame.segments function

A data frame with 658 observations and 7 variables. The data describe the straight line segments used to recreate the roads on Snow's map.<dl>
 <dt><code>street</code></dt>
<dd>numeric street ID</dd> <dt><code>id</code></dt>
<dd>character segment ID</dd> <dt><code>name</code></dt>
<dd>road name</dd> <dt><code>x1</code></dt>
<dd>x-coordinate of first endpoint</dd> <dt><code>y1</code></dt>
<dd>y-coordinate of first endpoint</dd> <dt><code>x2</code></dt>
<dd>x-coordinate of second endpoint</dd> <dt><code>y2</code></dt>
<dd>y-coordinate of second endpoint</dd> <dt><code>lon1</code></dt>
<dd>longitude of first endpoint</dd> <dt><code>lat1</code></dt>
<dd>latitude of first endpoint</dd> <dt><code>lon2</code></dt>
<dd>longitude of second endpoint</dd> <dt><code>lat2</code></dt>
<dd>latitude of second endpoint</dd>
</dl>

Format

Dodson and Tobler's "Map Frame" street data transformed into road segments. — frame.segments

A data frame with 658 observations and 7 variables. The data describe the straight line segments used to recreate the roads on Snow's map.<dl>
 <dt><code>street</code></dt>
<dd>numeric street ID</dd>

 <dt><code>id</code></dt>
<dd>character segment ID</dd>

 <dt><code>name</code></dt>
<dd>road name</dd>

 <dt><code>x1</code></dt>
<dd>x-coordinate of first endpoint</dd>

 <dt><code>y1</code></dt>
<dd>y-coordinate of first endpoint</dd>

 <dt><code>x2</code></dt>
<dd>x-coordinate of second endpoint</dd>

 <dt><code>y2</code></dt>
<dd>y-coordinate of second endpoint</dd>

 <dt><code>lon1</code></dt>
<dd>longitude of first endpoint</dd>

 <dt><code>lat1</code></dt>
<dd>latitude of first endpoint</dd>

 <dt><code>lon2</code></dt>
<dd>longitude of second endpoint</dd>

 <dt><code>lat2</code></dt>
<dd>latitude of second endpoint</dd>


</dl>

frame.segments: Dodson and Tobler's "Map Frame" street data transformed into road segments.

Description

Usage

Arguments

Format