[Talk-us] what do we mean by geocoding?

[Brian May]

The USPS site referenced below has zipcode polygons and postal delivery 
routes overlaid on an interactive map along with the number of 
residences and business each route serves. Search for a zipcode or an 
address to get started.
https://eddm.usps.com/eddm/customer/routeSearch.action

It looks like the zipcodes may be the Census version, just guessing by 
the field naming convention. You can browse the ArcGIS Server here: 
https://gis.usps.com/ArcSRV/rest/services/EDDM/EDDM_ZIP5/MapServer/0

Brian


On 6/25/2013 4:59 PM, Darrell Fuhriman wrote:
>> Part of the reason that the USPS disavows a geographic boundary for ZIP Codes is that they often keep residential delivery and commercial delivery and high-rise delivery (having apts or suites) separate even when they are next to each other on the street.  This can be confusing if you assume a geographic basis for ZIP Codes.
>>
>> Carl.
> I've always thought the best way to think of it is that ZIP codes are built from delivery routes. In essence they are linear features.
>
> My favorite example is that many National Parks have a DC ZIP code, despite being.. well... a long way from DC, because mail is routed through the National Park Service headquarters.
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> d.
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