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5

American Fact Finder data (tabular) needs to be joined to TIGER data. The TIGER data delineates the boundaries you are working with, be it State, County, MCD, Census tracts, block groups, blocks, etc. Once you have the data joined through a common field you can start examining the relationships between the data.


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You do not say if you are in academia? If you are then the obvious place to go would be edina and digimap. If you are not then have a look here for free elevation data. Of cause you could go to OS the national mapping agency of the UK and get a 50m terrain model...


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Free of charge i would say: Get either ASTER or SRTM from earthexplorer. Both are available at 1 arc-sec., respectively ~20m vertical rmse.


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No, you need to create a new column with the right datatype and parse the data from the old column to the new column (guess your using shape files). A new column can be made with the table manager and the update with the field calculator.


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The American Factfinder is going to be the most comprehensive source for downloading current US Census data. It's also going to include the identifiers that you need to join the attributes to the census geography by default; you can download the geography files from the Census TIGER shapefiles site. To use the Factfinder, select the Advanced Search option. ...


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The new Environment Agency API provides lat/lng for stations, though in England only: http://environment.data.gov.uk/flood-monitoring/doc/reference#stations


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Depending on what you need the data for, the following links may or may not be helpful. You may find useful data from the National River Flow Archive (NRFA), part of the Centre for Ecology & Hydrology: http://www.ceh.ac.uk/data/nrfa/ As far as I can tell they do not have GIS formats available to download. This website, made by Shoothill, maps river ...


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JPG and PNG are not spatially aware formats, meaning their location/georeferencing information is not stored within the file itself. That requires an accompanying World file that stores such information so the image can be georeferenced. As GISGe suggested, the GeoTIFF format is available and does include georeferencing information, so it would be suggested ...


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The Cal-Atlas site has 2012 NAIP R,G,B,NIR quarter-quad tiffs available for download. The USDA-APFO provides a REST ArcGIS webmap service which now contains the NIR band. To use this service you will need to add a GIS Server in ArcGIS. 1) Open ArcCatalog and in the Catalog Tree select "GIS Servers" 2) Double click "Add ArcGIS Server" 3) In wizard select ...


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For temperature and precipitation, you can use the Worldclim dataset, but it does not include cloud cover.


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There are several resources available according to a basic Google search on "Mars GIS data". For instance: USGS Planetary GIS Web Server (PIGWAD, and no I'm not making that up) Mars Open Planetary Data Arizona State University Mars Global Datasets


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There is a link you can look regarding your first question: https://geonet.esri.com/thread/45017


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Landsat 8 is now being digested by AWS. There is a standard directory structure and the data can be accessed via an http or through the AWS commandline interface. While this not an ftp interface, it will be quite easy to batch download in a scripting language.


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Not exactly "high-resolution," but the price is right. Esri's World Imagery map service presents satellite imagery for the world and high-resolution imagery for the United States and other areas around the world.



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