[OldNorth] Click on the Census map to find the density in any Block in Davis

[John Lofland]

Z and others,

As I tried carefully to explain in my memo on 
calculating density, the Census measures are only 
to two decimal points. For small areas, this can 
lead to serious underrepresentation of density. 
The specifics of this are given in my memo.

Therefore, Z, in my view you are incorrect about 
the need for measurement.  For small areas, 
measurement might be needed to get the proper 
precision.

John Lofland



At 8:23 PM +0000 1/5/04, Z Smith wrote:
>John wanted to know about the population density 
>in Old North vs. College Park.  Here's how to do 
>it yourself, no measuring tape required:
>
>If you want to find the population density of 
>any block in Davis, just use the Census website. 
>Following the instructions below will take you 
>to a map of Davis with population density sorted 
>Block by Block.  Above the map you can set the 
>action ("re-center and zoom" by default) to 
>"Identify".  This will bring up a little pop-up 
>window with the population density of the block 
>you click on.
>
>Sample results:
>
>Old North: between D & E Street and 6th & 7th 
>Street:  5000 persons per square mile
>
>College Park: west side of College Park drive: 5261 persons per square mile
>College Park: east side of College Park drive: 4138 persons per square mile
>
>Aggie Village: 4714 persons per square mile
>
>Instructions:
>1.	For the map of population density by Census Blocks for Davis:
>a.	Go to http://www.census.gov
>b.	Click on “Your Gateway to Census 2000”
>c.	Click on “American FactFinder”
>d.	Click on “Expert User? Go directly to Data Sets.”
>e.	Select the eighth data set, titled 
>“Census 2000 Redistricting Data (P.L. 94-171) 
>Summary File” radio button, and then select 
>“Thematic Maps” from the list that appears at 
>the right.
>f.	Select “Place” from the drop-down list of Geographic Types.
>g.	Select “California” for the state
>h.	Select “Davis city” for the Geographic 
>Area and then press “Show Result.”
>i.	The resulting map is color-coded by 
>Census Tract.   Go to the drop-down list and 
>instead select “Block”
>j.	Zoom in and scroll
>k.              Select "identify" and click on the Block of interest
>
>_________________________________________________________________
>Check your PC for viruses with the FREE McAfee 
>online computer scan. 
>http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
>
>_______________________________________________
>oldnorth mailing list
>oldnorth at mailman.dcn.org
>http://www2.dcn.org/mailman/listinfo/oldnorth