Over eighty years after it was originally published, Charles O. Paullin’s Atlas of the Historical Geography of the United States remains one of the most impressive and most useful atlases of American history. Containing nearly 700 individual maps spread across 166 plates, it addresses a broad range of issues. Beginning with a chapter consisting of 33 maps on the natural environment and a second containing 47 maps documenting the evolution of European and later American cartographic knowledge about North America, the atlas mapped an exhaustive number of historical topics: exploration and settlement of the continent, the location of colleges and churches, disputes over international and state boundaries, voting in presidential elections and in Congress, reforms from women’s suffrage to workmen’s compensation, transportation, industries, agriculture, commerce, the distribution of wealth, and military history. Continue reading
Geographic masking is a technique used to basically move your data around so not to give away the exact geographic coordinates of individual level data. This is done when locations of individuals (like in health data, crime data, or endangered species data) need to be “anonymized” so they cannot be re-identified through reverse geocoding.
Everything runs client-side in your browser, meaning there’s nothing to install, data never leaves your computer, and as a result nobody except you ever sees your confidential files. It is a safe and secure way to anonymize spatial data. Finally, you can map your secret fishing spots and share them with others without giving away the exact locations! Check it out!
Here is a scary report from New York Times on how our personal locations are being tracked, and mostly from unregulated location data companies that cross reference your location with other databases to figure out who you are, where you live, and where you have been.
“In one case, we observed a change in the regular movements of a Microsoft engineer. He made a visit one Tuesday afternoon to the main Seattle campus of a Microsoft competitor, Amazon. The following month, he started a new job at Amazon. It took minutes to identify him as Ben Broili, a manager now for Amazon Prime Air, a drone delivery service.”
Click below to read the report, and parts 2 to 7!