A code of letters and digits used as part of a postal address to aid the sorting of mail

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8
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3answers
423 views

Data source for determining postal codes given location?

What is the best data source for determining international postal codes given a latitude & longitude?
7
votes
5answers
467 views

How to calculate purchasing power on postcode level?

Does anyone know of an algorithm to calculate purchasing power on a postcode level? What source data is needed? Purchasing power on admin. level, population?
4
votes
3answers
4k views

Postcode Shape Files for the UK

I am trying to find the shape files for postcode sector and districts in the UK. Specifically inside London. I know I can go and pay for these but I only really need to use them once. I want to ...
3
votes
2answers
157 views

Convert a UK postal code to a city name?

is there any service to convert a UK postal code to a city name? Does one postal code always map to one city, or to more than one? Is there a free web service to do this conversion for me? Thanks.
3
votes
3answers
592 views

Load and display a large number of points using openlayers

I am using OpenLayers.Layer.Vector to load and display KML files. Some of the KML files have a large number of points in them (lets say around 20,000). I am surprised they load at all (in chrome), but ...
2
votes
2answers
348 views

UK Postcode District Aggregation

I've had a request recently to generate a map which includes UK Postcode districts, ie aggregations of postcodes based on the first section of the code (NW2, B1, E11 etc.). From what I've read, these ...
2
votes
2answers
129 views

Japan Data: Postcode/Census

Hi I'm primarily looking for a GIS data source for postal codes in Japan as well as census data for different scales of geography. Has anyone found a good source of these data sets that is in ...
2
votes
0answers
21 views

Postal codes in shapefile overlapping

I downloaded some shapefiles from the Australian Bureau of Statistics (ABS). Its basically showing a bunch of suburbs when I view the shapefile through a GIS tool. The GIS tool that I am using at ...
1
vote
1answer
171 views

Where does Google get updated data about postal codes?

I have been searching for the most recent list of Postal Codes in US but I most of them are two or three years old. I did cross check them with the Google Maps, though most of them them were correct ...
1
vote
1answer
47 views

Spaces in postcodes preventing join

I have a shapefile British Columbia with postal codes. The attribute table gives the codes with no spaces, eg V6P2A8. I am trying to join a csv file by postal code (the key I am using). My csv file ...
1
vote
2answers
70 views

Canada FSALDU 6-digit Postal Code Data Providers

I have been looking into finding point data for the Canadian 6-digit postal code (FSALDU). I have come up with 3 sources so far, 2 being far more expensive than the other. After speaking with the ...
0
votes
3answers
555 views

Which US zipcodes map to more than one state or more than one city?

I'm using a zip code listing, and I am curious to know how many (or which) zip codes map to more than one US state or US city? For instance I know that 42223 resolves to the same city which straddles ...
0
votes
1answer
89 views

Code-Point Polygon Data and Google Maps

I'm currently working with OS Code-point polygons and google maps coordinates. I have google maps point coordinates for a list of houses which are located at the center of each full postcode ...