Learn R Programming

RDSTK (version 1.1)

coordinates2statistics: Coverts latitude and longitude coordinates to statistical measures about that location.

Description

A function to return characteristics like population density, elevation, climate, ethnic makeup, and other statistics for points all around the world at a 1km-squared or finer resolution.

Usage

coordinates2statistics(latitude, longitude, statistic, session=getCurlHandle())

Arguments

latitude
The latitude (numeric) of the point you wish to reference.
longitude
The longitude (numeric) of the point you wish to reference.
statistic
The name of the statistic you want, eg "population_density" - see the DSTK docs for a full list.
session
This is the CURLHandle object giving the structure for the options and that will process the command. For curlMultiPerform, this is an object of class code MultiCURLHandle-class.

Value

Returns a data.frame containing
value
A number or array of numbers representing the value at this point.
description
A human-readable description of what the value means.
source
Where the data originally came from.
units
Optional - what units the value is measured in.
index
Optional - if the value is actually an enumerated string (ie for the land cover type) this is the numerical index.
proportion_of
If the value is proportional (eg the percentage of residents who are below the poverty level) this gives the name of the statistic that it's a proportion of.

References

http://www.datasciencetoolkit.org/developerdocs#coordinates2statistics

See Also

getURL, getCurlHandle

Examples

Run this code
	## Not run: 
# 		coordinates2statistics(37.769456, -122.429128, 'population_density')
# 	## End(Not run)

Run the code above in your browser using DataLab