PAMML Model Design: modeling population density

PAMML Model Design

Example problem: Modeling population density

Task Outline

Acquire Census block group data
Identify area and total population variables
Calculate population density (area / total population)
Aggregate density measurements into quintiles (5 data groupings with an equal number of members in each)

traditional flow diagram

hierarchical diagram based on the cascading application of design patterns		abstract design pattern for the population density modeling problem

PAMML instantiation (full XML Schema here)

<?xml version="1.0" encoding="UTF-8"?>
<VectorDataModel  
		xsi:type="VectorQuantile" 
		xmlns="http://web.mit.edu/rajsingh/www/xml/ns/pamml" 
		xsi:schemaLocation="http://web.mit.edu/rajsingh/www/xml/ns/pamml file:///Users/rajsingh/projects/pamml/schema/pamml.xsd" 
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
		srsName="EPSG:26986" 
		name="Basic Population Density by quintile" 
		useFeatureType="popdensity" 
		numRanges="5">
	<Metadata>
		<Description>Classified population density of Cambridge, MA based on Census 2000</Description>
	</Metadata>
	<Permissions user="rwxa" group="ruxa" other="ruxa"/>
	<AttributeInfo>
		<Attribute name="popdensityquintile" dataType="xs:decimal"/>
		<Attribute name="uniqueid" dataType="xs:int"/>
	</AttributeInfo>
	<BaseVector xsi:type="InternalVector" name="censusdata" srsName="EPSG:26986">
		<RemoteInfo modelLoc="file:///./cambma_popdensity.xml"/>
	</BaseVector>
</VectorDataModel>