Changes between Version 29 and Version 30 of Deployments/Sandy


Ignore:
Timestamp:
11/05/12 07:19:11 (12 years ago)
Author:
Pat Tressel
Comment:

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  • Deployments/Sandy

    v29 v30  
    5757   * Zipcodes can cross administrative region boundaries. They don't cross state boundaries, but do cross county boundaries. (For the population centers project, when we found a zipcode that spanned admin regions, we partitioned the zipcode -- made one location record for each partition. Names were qualified with the parent region.)
    5858   * Zipcode regions are not technically polygons but rather groups of addresses.
     59   * USPS neither needs nor maintains boundary polygons.
     60   * Each zipcode is assigned by USPS to a city, but not by boundary inclusion -- rather, this is by which post office delivers mail to that zipcode. Thus lists of USPS-designated cities cannot be used for the location hierarchy.
    5961   * Zipcodes have a prefix hierarchy.
    6062    * http://stevemorse.org/jcal/zip.html