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Removed the previous links, which I should have checked more scrutinously, and found some information and shapefiles which hopefully would be of some use: The EEZ Boundaries (Exclusive Economic Zone) which for this purpose is mainly used to show the coastal lines and outlines of continents. http://www.marineregions.org/downloads.php#eez The main Global ...


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You definitely need coordinates or to join that data with existing polygons/points. A quick look at your data shows that it is broken down into boroughs or district numbers. My next step would be to join this data in ArcGIs or QGIS (whatever solution you have available to you) to either the boroughs or districts. This will allow you to visualize the ...


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As @SaraBarnes said in the comments, you will likely first have to export the file to a shapefile or feature class. Next, in order to classify unique values, you have to "Add All Values" or add specific values you'd like to classify with the "Add Values..." buttons in the Symbology tab, as shown below. You can then set symbology based on those values.


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Not all cities have this data. There is generally a fee associated with acquiring it. It is generally beyond the resources of most cities to develop this data themselves. If a city does possess this data it is usually acquired through the County/Parish or Metropolitan Planning Organization/Council of Governments that the city belongs to. You may want to ...


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like the previous answer this is also a commercial provider: DDS digital data services GmbH, based in Karlsruhe, Germany offers postcode data for most of the world. Much of their data targets at geomarketing applications and thus offers even subunits of postalcodes. http://www.ddsgeo.com/products/postal-boundaries.html You would not get data in this level ...


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Get a zip-code boundary layer and run Polygon Neighbors. Review How Polygon Neighbors Works and Up-To-Date Zip-Code Boundaries


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You could of course filter out the data points one-of-two or one-of-four, but you'd be able to retain the original information in a fraction of the original size if you convert it to a binary raster. Lots of ways to get there, and most assume the point data is sorted (better to be sorted west-to-east in bands from north-to-south), but you can populate that ...


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Have you checked EPA's WATERS program: http://water.epa.gov/scitech/datait/tools/waters/data/index.cfm. USGS also has a water monitoring program


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Natural Earth project has these datasets and many more: http://www.naturalearthdata.com/features/


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The world.dat file is a file format specifically for GnuPlot. I haven't heard of it in use anywhere else and I couldn't find anything. In a more recent blog post on that same site, the author talks about updating the world.dat file with better data - specifically from Natural Earth. Since the author starts with shape files, this same data flow could be ...


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You might be able to extract some information or use Open Street Maps as a Base. Here you can search for some datasets through data.gov ArcGis provides street and highways at a certain resolution. A quick google search may yield you more results depending on what exactly you're looking for. But the above should serve you well! There may be other ...



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