landmarks

Orthogonal projection of landmarks onto road network.

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

landmarks function

A data frame with 6 variables that records the position of the orthogonal projection of landmarks onto the network of roads.<dl>
 <dt><code>road.segment</code></dt>
<dd>"address" road segment</dd> <dt><code>x.proj</code></dt>
<dd>orthogonal x-coordinate</dd> <dt><code>y.proj</code></dt>
<dd>orthogonal y-coordinate</dd> <dt><code>ortho.dist</code></dt>
<dd>orthogonal distance to home road segment</dd> <dt><code>x</code></dt>
<dd>nominal x-coordinate</dd> <dt><code>y</code></dt>
<dd>nominal y-coordinate</dd> <dt><code>name</code></dt>
<dd>landmark name</dd> <dt><code>case</code></dt>
<dd>numeric case ID</dd> <dt><code>lon</code></dt>
<dd>longitude</dd> <dt><code>lat</code></dt>
<dd>latitude</dd> 
</dl>

Format

Orthogonal projection of landmarks onto road network. — landmarks

A data frame with 6 variables that records the position of the orthogonal projection of landmarks onto the network of roads.<dl>
 <dt><code>road.segment</code></dt>
<dd>"address" road segment</dd>

 <dt><code>x.proj</code></dt>
<dd>orthogonal x-coordinate</dd>

 <dt><code>y.proj</code></dt>
<dd>orthogonal y-coordinate</dd>

 <dt><code>ortho.dist</code></dt>
<dd>orthogonal distance to home road segment</dd>

 <dt><code>x</code></dt>
<dd>nominal x-coordinate</dd>

 <dt><code>y</code></dt>
<dd>nominal y-coordinate</dd>

 <dt><code>name</code></dt>
<dd>landmark name</dd>

 <dt><code>case</code></dt>
<dd>numeric case ID</dd>

 <dt><code>lon</code></dt>
<dd>longitude</dd>

 <dt><code>lat</code></dt>
<dd>latitude</dd>

 
</dl>

landmarks: Orthogonal projection of landmarks onto road network.

Description

Usage

Arguments

Format