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The statistical and geographic data are disseminated free of charge through a sophisticated online data access system. [ 1 ] In addition, NHGIS has created historical and contemporary cartographic boundary shapefiles compatible with every census, and over 50 million lines of metadata describing the collection.
TIGER includes both land features such as roads, rivers, and lakes, as well as areas such as counties, census tracts, and census blocks. Some of the geographic areas represented in TIGER are political areas, including state and federally recognized tribal lands, cities, counties, congressional districts, and school districts.
Online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download. NPScape United States Department of the Interior National Park Service NPScape is a landscape dynamics monitoring project that provides landscape-level data, tools, and evaluations for ...
CSPro was designed and implemented through a joint effort by the developers of two earlier software packages that were used to capture, edit, and tabulate census and survey data on DOS-based machines: the Integrated Microcomputer Processing System (IMPS), developed by the U.S. Census Bureau, and the Integrated System for Survey Analysis (ISSA ...
A census tract, census area, census district or meshblock [1] is a geographic region defined for the purpose of taking a census. [2] Sometimes these coincide with the limits of cities , towns or other administrative areas [ 2 ] and several tracts commonly exist within a county.
As of 2022, based on the results of the 2020 Census, there are 2,487 PUMAs. PUMAs allow the Census to publish census data for sub-state areas throughout every state. For example, the ACS publishes detailed data every year, but due to their sampling procedure only publishes data for census area that have more than 65,000 People.
Individual USPS ZIP codes can cross state, place, county, census tract, census block group and census block boundaries, so the Census Bureau asserts that "there is no correlation between ZIP codes and Census Bureau geography". [2] Moreover, the USPS frequently realigns, merges, or splits ZIP codes to meet changing needs.
[2] Although it is a public database, GADM has a higher spatial resolution than other free databases, [3] and also higher than commercial software such as ArcGIS. [4] Those sources are commonly use to complete data analysis with data visualisation such as data plots , choropleth map , etc. [ 5 ] [ 6 ]