Posted on February 17, 2023 (Updated on July 10, 2025)

US Census Tiger/LINE Area Landmarks – what are the airport polygons based on?

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What is Tiger line format?

Topologically Integrated Geographic Encoding and Referencing, or TIGER, or TIGER/Line is a format used by the United States Census Bureau to describe land attributes such as roads, buildings, rivers, and lakes, as well as areas such as census tracts.

What is Tiger data?

TIGER stands for the Topologically Integrated Geographic Encoding and Referencing system and represents the U.S. Census Bureau’s geographic spatial data. TIGER data products are developed using the TIGER geospatial data as the primary source.
 

How do I download a shapefile from the US census Bureau?

You may download TIGER/Line Shapefiles using a Web interface, directly from our FTP site, or via an FTP client. To download through the Web interface or FTP site, go to html>. Choose Geographies, then Mapping Files, then TIGER/Line Shapefiles.

What is tiger database in GIS?

TIGER/Line Geodatabases are spatial extracts from the Census Bureau’s Master Address File/Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System for use with geographic information systems (GIS) software.

How is tiger survey done?

In this cycle, recording of primary field data digitally, through mobile phone application M-STrIPES (Monitoring system for tigers – intensive protection and ecological status), that uses GPS to geotag photo-evidences and survey information, made this exercise more accurate.

Which method is used for tiger census?

Census methodology



Double sampling based on ground-based surveys and actual images captured on camera-traps. Double sampling method was introduced in 2006 after the “pugmark” surveys were found to be inaccurate.
 

How are census tracts determined?

Census tracts generally have a population size between 1,200 and 8,000 people, with an optimum size of 4,000 people. A census tract usually covers a contiguous area; however, the spatial size of census tracts varies widely depending on the density of settlement.
 

What do tiger files typically contain?

TIGER (Topologically Integrated Geographic Encoding and Referencing) files come from the US Census Bureau. TIGER files contain information about many different features such as roads, rivers, lakes, political boundaries (state, county), and census boundaries (Block, Block Group, Census Tract).

Why is it called tiger line in golf?

The term “Tiger tees” is a slang term in golf for the tee boxes used in professional tournaments. In other words, the Tiger tees are the rearmost teeing grounds a golf course has available.

Why is tiger data important?

TIGER GIS data became the first nationwide digital map of roads, railroads and census boundaries. TIGER stimulated technological developments like MapQuest, Yahoo, followed by Google. The data formed a base for OpenStreetMap in the United States in 2005.
 

How is tiger survey carried out in India?

Tracking tigers through camera traps has fast become the standard method for countries to count their tigers, and India is currently using this important tool. India is home to over 60% of the world’s tiger population which makes its counting efforts the world’s largest camera-trapping exercise.