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There is a good data set from Natural Earth that contains countries and their admin units. As far as I remember abbreviations and ISO codes are also included. The data is free and more or less up to date. Have a look: http://www.naturalearthdata.com/downloads/10m-cultural-vectors/10m-admin-1-states-provinces/ Maybe this post is helpful too: Full list of ...


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Great links from @MappaGnosis and @BagOfSpanners. My number one source for shapefiles is DIVA-GIS, simply select your country (United Kingdom) and subject (Administrative areas). Unzip the downloaded file and you should see 3 polygon shapefiles with differing top-levels. The layer GBR_adm0 contains a single polygon of the UK: If you wish, you can convert ...


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For the free Ordnance Survey data, go to http://www.ordnancesurvey.co.uk/business-and-government/products/opendata-products.html. Click on the big button at the top labelled "Order Now". On the new page, scroll down until you see Boundary Line. Each dataset has a number of check boxes for ordering options. Boundary line is only offered for the whole of ...


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I use http://openstreetmapdata.com/data/coastlines It's in lat/long format, rather than OSGR format. It covers the entire planet, but Shapefiles are a fairly simple format, so it's possible to write a smallish program to filter by latitude and longitude.


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You can use ArcMap's [Make Query Table] geoprocessing tool to: Set input table to your points data. Select need fields(you must select Shape field if you want get result with feature) In the where_clause,input as your question([Time] in (SELECT MAX( [Time] ) FROM data_table GROUP BY [Name])) Set table name if you not need default out table name. Click Ok ...


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You can also use the Global Administrative boundaries, it provides different levels of aggregation. However, the last update was in January 2012. A well done list including other free GIS datasets is available on RT Wilson's blog. The global insight dataset is also very comprehensive and regularly updated, but it is not free. It includes political ...


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It is not at all clear what methodology they used to produce this map, but absent such an explanation, I would assume that "the population center" just means the spatial centroid of the census tract; that is, that the entire tract population is assumed to be at the tract centroid and that census tracts are coded (colored) based on distance from tract ...


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Kieran, There are not many projects that require the entire river network of planet Earth, typically most people are focused on a continent or country or even a single catchment. Can you narrow it down? Do you actually need a global dataset? I ask this as you can often find river networks at a higher resolution for a specific country. For example if you ...



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