Tag Archives: mapping cities

Relating ZIP Codes to City/Places

.. relating ZIP codes to cities .. 214 ZIP code areas intersect with New York city — what are these ZIP codes, their population and how many are completely within the city? What part of a ZIP code area of interest intersects with what city? Conversely, what ZIP code areas intersect with a city of interest? This section provides data and tools that can be used to answer these types of questions and gain insights into geospatial relationships. See more detailed information in the related full Web section.

The 2010 ZIP Code Tabulation Area (ZCTA) to City/Place relationship data provide a means to equivalence ZCTAs with Census 2010 cities/places. ZCTAs are geographic areas defined as sets of Census 2010 census blocks closely resembling USPS ZIP codes (lines, not areas). ZCTA boundaries are fixed for the intercensal period 2010 through 2020. Census 2010 vintage city/place areas are likewise defined as sets of Census 2010 census blocks. The ZCTA-City/place relationship data are developed through the use of the intersecting census block geography and associated Census 2010 Summary File 1 demographic data.

ZCTA-Place Relationships
The following graphic shows relationships between two selected ZCTAs (red boundaries) and related cities/places (blue fill pattern) in the Pima/Cochise County, AZ area. Relationships between these geographies are reviewed in examples shown below.

– View developed using CV XE GIS and related GIS project.

Using the ZCTA-Place Relationship Data
Two examples illustrating how to use the ZCTA-place relationship data are provided below. The examples are interconnected to the GIS project used to develop the map views, interactive table and data file described in this section. Example 1 describes how to use the data for a ZIP code area entirely located within one city/place. Example 2 describes how to use the data for a ZIP code area located in more than one city/place and area not located in any city/place.

ZCTA to Place Relationships: Example 1
In this example, ZCTA 85711, highlighted in red in the graphic shown below, falls wholly within place 77000, outlined in bold black below. As a result, there is only one corresponding record for ZCTA 85711 in the relationship file. The 2010 Census population for this relationship record is 41,251 (POPPT) which is equal to the 2010 Census population for ZCTA 85711 (ZPOP). See more details about this example.

ZCTA to Place Relationships: Example 2
In this example, ZCTA 85630, highlighted below in red in the graphic shown below, contains two places: all of place 62280 and part of place 05770, both are outlined in black below. As a result, there are two corresponding relationship records in the relationship file. For the first relationship record, the total 2010 Census population for ZCTA is 2,819 (ZPOP). See more details about this example.

Using the Interactive Table
Use the full interactive table to examine U.S. national scope ZCTA-city/place relationships. The following graphic illustrates how ZIP code can be displayed/examined for one city — Tucson, AZ. Each row summarizes characteristics of a ZIP code in Tucson. The last row in the graphic shows characteristics of ZIP code 85711 — the same ZIP code reviewed in Example 1 above.

Click graphic for larger view.

Join me in a Data Analytics Lab session to discuss more details about accessing and using wide-ranging demographic-economic data and data analytics. Learn more about using these data for areas and applications of interest.

About the Author
— Warren Glimpse is former senior Census Bureau statistician responsible for innovative data access and use operations. He is also the former associate director of the U.S. Office of Federal Statistical Policy and Standards for data access and use. He has more than 20 years of experience in the private sector developing data resources and tools for integration and analysis of geographic, demographic, economic and business data. Contact Warren. Join Warren on LinkedIn.

Largest & Fastest Growing Cities

.. new July 1, 2014 Census Bureau model-based estimates for the U.S. 19,509 incorporated cities show a total population of 200,158,492 compared to 192,191,138 as of Census 2010 (an increase of almost 8 million or 4.14 percent). These areas are incorporated cities as recognized by their corresponding state governments and granted certain governmental rights and responsibilities. The increase of almost 8 million in city population reflects a 4.2% increase over the little more than 4 years. The population change includes areas annexed by cities since 2010 and includes some cities that did not exist as of Census 2010. See related Web section for more detail on topics covered here.

Visual Analysis of City/Place Population Dynamics
Use the CV XE GIS software with city/place GIS project to examine characteristics of city/place population, 2010-2014. The following view shows patterns of population percent change, 2010-14, by city in the Charlotte, NC/SC metro area. Create custom maps similar to this map for any city/place/area. Create your own intervals and color patterns. Select from alternative demographic measure. Add your own data.

… view developed using the CV XE GIS software.
… click map for larger view and details including city name.

Using the Interactive Table
Use the interactive table to view, rank, query and compare cities of interest. The following graphic shows North Carolina counties ranked in descending order based on the 2014 population estimate. Use the interactive table to create a similar view for states of interest.

… click graphic for larger view.

View the list of cities with the largest 2014 population by dbl-clicking the header cell “Population 7/1/2014” in the table. Place a state query on the table to select cities in a state of interest and click the header cell “Population 7/1/2014” to view cities in that state ranked by size. Choose other columns to view other relationships.

Examining the Largest Cities
The following sequence of graphics illustrate use of the interactive table to examine characteristics of cities having 2014 population of 100,000 or more. The first step was to set the 2014 population threshold at 100,000 using the tools below the table. Choose your own population threshold (any value). Next, click the Population 2014 header cell to rank these cities in descending order on this measure.

… click graphic for larger view.

To view the largest cities (100,000 or more population in 2014) ranked on population change 2010 to 2014, click the population change header cell. The result is shown in the following graphic.

… click graphic for larger view.

To view the largest cities (100,000 or more population in 2014) ranked on population percent change 2010 to 2014, click the population change header cell. The result is shown in the following graphic.

… click graphic for larger view.

The America’s Communities Program database will updated soon to reflect these updates. Examine the annual population estimates in context with other demographic-economic measures and patterns.

Join us in a Data Analytics Lab Session where we review and discuss use of tools and resources like those covered in this section.

About the Author
— Warren Glimpse is former senior Census Bureau statistician responsible for innovative data access and use operations. He is also the former associate director of the U.S. Office of Federal Statistical Policy and Standards for data access and use. He has more than 20 years of experience in the private sector developing data resources and tools for integration and analysis of geographic, demographic, economic and business data.