history & demographic structure of phila. mapping angles

Doing JusticeDoing Justice

History & Demographic Structure ofPhila. Mapping Angles


Sections: Philadelphia Population: Statewide Historical

Context Choropleth maps

Philadelphia, Pittsburgh, and nearby Time trend

Philly itself: Spatial History Map choices

Law Behaving 1920s Delinquency Data


United States Census

U.S. Constitution Requires census of population Every ten years Used for redistricting House of Representatives 1790-2000

Methods changed over years Can use Census Figures for Historical Trends

http://www.census.gov/main/www/aboutus.html

Census HQ in Maryland


Pennsylvania Counties

Pennsylvania CountiesPittsburgh is within Allegheny County


History of Pennsylvania Population by CountyUsing Maps

Legend How many groups? What are ranges within each group?

Map type: choropleth map “shows numerical data … for a group of regions by (1) grouping the data into classes, and (2) shading each class on the map.”

Prentice Hall. “Making maps with GIS.” http://wps.prenhall.com/

esm_clarke_gsgis_4/0,7300,473320-,00.html


1790Population

ByCounty


1850Population

ByCounty

Note legend change


1900Population

ByCounty

Note legend change again


1950Population

ByCounty


2000 Population By County


Philadelphia: more detail over time

Line charts X Axis (horizontal): organizing variable (time) Y axis (vertical): variable being measured (population)


Stea

dy g

rowth

, 184

0-19

30


Peak population


Sources of growth?


Sources of growth?

Immigration Foreign Domestic

Growth of Jobs Manufacturing Commerce (ship, railroad)

Incorporation Surrounding towns incorporated (1854)


Compared to Pittsburgh (Allegheny Co.)?


When didPittsburgh’s

Steady Growth Begin?


1880


Did Pittsburgh every reach 2 million?


From 1880 to 1930, where Philly and Pittsburgh adding about the same number of people every year?


Since theTwo lines

ArePARALLEL

Over time,We will say yes


What was happening in Philadelphia’s two adjoining counties to the west? Delaware Montgomery?


As late as 1930,The population in eachWas only about _____


Sections: Philadelphia Population: Statewide Historical Context

Choropleth maps Philadelphia, Pittsburgh, and nearby

Time trend Philly itself: History Map and demographic data within Philly

Choices Modifiable areal unit problem


Philadelphia

1681

Small

port city on

Delaware River


The Old Commercial Center?

Hard to pinpoint Approximate: Customs house would be nearby

Foreign vessels


Carpenters Hall, Custom’s House 1801-1817Between. 3rd, 4th below Chestnut St.


x

LowerDockAreaX =

CarpenterHall

Circle=Society

Hill,OldeCity


Over time, the harbor spread

Both to the north and south


As it spread, warehousesAnd canneriesAnd cheap housing forImmigrants working in harborOr related industries grew up

Over time became substandard,Increasingly crowded.

Often, only housing affordable forBottom rung workers


Over time, housingExpands outward,Back from harbor;Along major routes,Horse drawn trolley,Then trolley

Newer housing more $

As housing ages, it Gets cheaper


Same time,Downtown expanding

Businesses takingOver Poor

Residential districts

DowntownExpands to

Meet IncreasingPopulation to be Served

In the city andbeyond


because ….Different types of people live in different placesEbenezer Maxwell Mansion,

Chestnut Hill

Vacant Houses, West Philadelphia


Social Space maps onto physical space

1930 Status Differences across Election wards

Variable: Median Rent from 1930 Census 4 groups 11 wards each DARK = HI RENT

LIGHT = LOW RENT


PBS NewsHour 10/2/202

http://www.pbs.org/newshour/bb/entertainment/july-dec02/hwl_10-2.html#

Mayor Street’s Neighborhood Transformation Initiative

history & demographic structure of phila. mapping angles

Documents

maryland slide

cheaper slide

html slide

south slide

west philadelphia slide

allegheny county slide

low rent slide

olde city slide