Added by dblasby, last edited by Chris Holmes on Jul 03, 2006  (view change)

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This is a multistep process.

  1. Loading TIGER basedata and QA/QC
    • writes the TIGER data to a PostGIS database
  2. Loading TIGER polygons and QA/QC
    • builds the simple TIGER polygons and writes them to the PostGIS database
  3. Loading TIGER landmarks
    • creates the polygon_landmarks and point_landmarks dataset
  4. Loading TIGER water
    • creates the water_polygon, water_line, and water_shoreline datasets
  5. Loading TIGER roads
    • creates the TIGER roads and railroads datasets
  6. Loading TIGER roads major
    • creates the TIGER Interstate/US Highway/State Highway/Major Roads (including generalizations)
  7. Loading TIGER high-level polygon
    • creates the TIGER high level polygon datasets (state polygons, county polygon, zipcode polygons, zipcode+4 polygons, economic polygons, cenus polygons, etc...)
  8. Loading TIGER Geocoder
    • setup a simple WFS-R that does TIGER-based geocoding (geocoder.us)
More Info about TIGER

The offical TIGER 2005fe manual is attached here. This 350 page .pdf goes into great detail about the TIGER dataset.

Did you know?

The TIGER 2005fe dataset contains:

count type dataset name
53,235,019 lines completechain
15,941,828 polygons pip,poly2
310,275 area (polygon) landmarks poly_landmarks
264,253 point landmarks (57,070 named) point_landmarks
1,667,674 water polygons water_polygon
7,880,932 (river) lines water_lines
2,593,665 shoreline lines water_shorelines
35,809,110 road lines roads
788,487 railroad lines railroads
Projection

We assume that the entire TIGER dataset is in lat/long NAD83. In actual fact, its a bit more complex than that:

From the TIGER manual:

For the 48 contiguous states, the District of Columbia, Alaska, Puerto Rico,
and the Virgin Islands, the coordinates in the 1995 and later versions of the
TIGER/Line files are in the North American Datum of 1983 (NAD83). For
Hawaii and the Pacific Island Areas, the Census Bureau used a variety of
sources for building the original digital file in the late 1980s. Neither the
specific identities of each of these sources nor their datums were recorded.

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