In December , we are adding a zip code-level view of this same information. The data is to be used for the purpose of analyzing, understanding, improving, or addressing problems related to broadband access.
As mentioned in the April release, the Broadband Usage Percentages Dataset is derived from aggregated and anonymized data Microsoft collects as part of our ongoing work to improve software and service performance and security.
Given the zip code-level dataset provides a more granular view of broadband usage percentages by households, we took the additional step to ensure data privacy guarantees by utilizing differential privacy, a technique that adds noise to the data aggregations, preventing leakage about the presence of specific individuals in the dataset. We implemented differential privacy through the SmartNoise platform, a first-of-its-kind open source platform for differential privacy co-developed by Microsoft and the OpenDP initiative led by Harvard.
We estimate broadband usage by combining privatized data from multiple Microsoft services. As Differential Privacy adds noise to protect privacy, the noise added to zip codes with a small number of households can impact utility. To ensure transparency into how zip codes with different population magnitudes are affected, we have included error range data. To read more about how differential privacy has been applied to this data, read the Broadband usage differential privacy paper.
Figure 2: Map of the United States by zip codes with indicators of broadband usage. This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement CLA declaring that you have the right to, and actually do, grant us the rights to use your contribution.
Simply follow the instructions provided by the bot. The Census Bureau and many other commercial services will try to interpolate the data to create polygons shapes using straight lines to represent the approximate area covered by a ZIP code, but none of these maps are official or entirely accurate. They provide a very close approximation of the area covered by a ZIP code.
You can easily notice some of the boundary issues when viewing our maps. Very rural areas aren't labeled as belonging to a ZIP code such as much of Nevada and Utah where there are few, if any, addresses to deliver mail.
If the address is on the same street as a ZIP code boundary on the map, be sure to search for the full street address to determine the ZIP code instead of relying on the map.
Their purpose is to convey statistical data about regions that are familiar to most citizens. As discussed above, it is difficult to precisely define a geographic area covered by a ZIP code.
ZCTAs were developed to account for some of the difficulties in assigning an area to a ZIP code and to precisely define a geographic area. In general, they are updated once every 10 years for the Census. The Census assigns an area to a ZCTA according to census blocks the smallest geographic unit used by the census. Imagine a city block that makes up a typical census block as pictured to the right. It is bounded on all 4 sides by portions of city streets that each have their own name and addresses.
The issue is that census blocks almost always split down the middle of the street. This enables a slightly more nuanced approach to allocating data between disparate geographies. Though often used for mapping, spatial analysis, and data aggregation careful attention is required when interpreting ZIP Code data relative to other administrative geographies. The following article demonstrates how to more effectively use the U.
Wilson, Ron and Din, Alexander, In this article, calls for service from New York City's Open Data Portal are estimated at the county-level and census tract-level.
This article also includes an accuracy analysis. Din, Alexander and Wilson, Ron, There are six types of crosswalk files available for download. It is important to note that the relationship between the two types of crosswalk files is not a perfectly inverse one. For that you would have to use the Tract to ZIP crosswalk file.
In these files the denominators used to calculate the address ratios are the ZIP code totals. All three files share an identical structure with the exception of the geographic codes in the second column, which differs between the three crosswalk files — tract, county, and CBSA — respectively. In the example below, ZIP code is split by two different Census tracts, and , which appear in the tract column.
You can explore the results of the surveys or find popular quick facts. The Census ended in October, Take a look back at the process. Your responses can help determine how much funding your local community will receive for public services. Census population data is used to divide the seats in the U. House of Representatives among the 50 states. It can also be used to draw boundaries for state legislative and school districts.
Besides using census data for the benefit of public services, you can also use it for genealogical research. To protect the privacy of people who respond to the U. Census, all records are kept confidential for 72 years.
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