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  1. Update certificate for https: access

    Your metadata used to be accessible by https. Did your certificate expire?
    Here is an example error:

    Not Found
    The requested URL /data/set/gpw-v4-population-density-rev10 was not found on this server.

    Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

    4 votes
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  2. Enable SSL Certificate

    Hi I noticed your SSL Cert has lapsed. We link to the metadata and the htttps link used to work but its stopped. Could you enable it?

    4 votes
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  3. Question

    Hello,
    I want to ask you why I can't the following codes in the GB administrative divisions codes dataset: 331120, 341420, 341620 ... I really need to get the location of these codes.

    Thank you,

    Best Regards,
    Siwar khelifa

    1 vote
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  4. Fix the data downloader for GMIS and HBASE

    The data viewer does not display either of these layers and there are errors when trying to download.

    1 vote
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  5. Can we download through curl or wget command

    I wanted to download all India states village outlines (http://sedac.ciesin.columbia.edu/data/set/india-india-village-level-geospatial-socio-econ-1991-2001/data-download) directly to our server. Is it possible using curl or wget command? If yes, can you share sample please. Thanks.

    1 vote
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  6. Fiji Population Density GRID

    Hi, Would you be able to describe for me how exactly you converted our current enumeration boundaries to a nation wide grid system. I understand that you created this grid for all the countries in the world i just dont understand how you converted our current enumeration area counts to be reflected in your current GPWv3 system.

    1 vote
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  7. Read the data in Matlab

    Hi, I am trying to read the population density data in 2005 and 2015 in Matlab. I am using the following codes.

    [pop, R] = geotiffread('gpw-v4-population-density_2005.tif');
    figure
    mapshow(pop, R);

    The reference R looks normal, but the density matrix pop has huge negative numbers in each entry. I also tried to use Mathematica to read the file, and it also does not work. Could you provide us simple examples on how to access your tif file? Thanks!

    9 votes
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  8. polygon shapefiles for GPWv4 National Identifier Grid

    Hello, I'm hoping to be able to download the raster for the polygon shapefiles for the GPWv4 National Identifier Grid. The page says, "Rasters of all resolutions were also converted to polygon shapefiles." Thanks.

    1 vote
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  9. I need numerical time-series data from NASA world maps

    I plot the data of systemic indicators and by isolating the periods of regular proportional change I identify the periods of emergent system transformation.

    1 vote
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  10. 1 vote
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  11. Update old Lotus 1-2-3 spreadsheets to .csv files

    http://sedac.ciesin.columbia.edu/data/set/cddc-china-agricultural-stats-1949-1990

    This dataset is in Lotus 1-2-3 format which is unreadable with modern software. Please could you update this to a future-proof CSV format?

    Thanks
    Dan

    1 vote
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  12. numeric data for impervious surface areas

    I was looking at: -- Global Man-made Impervious Surface (GMIS) Dataset From Landsat, v1 (2010) -- But could find no table of numeric values. I was actually looking for time series of numeric values as a proxy for global habitat loss.

    I'll look for the "footprint data" and "Nighttime Lights data", but suspect there may be no tables of numeric data for those too. I don't have the expertise to extract it. If I wanted to get time series for the global totals for these how would I get it?

    1 vote
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  13. Open-sourcing your grid-making algorithm

    I'm from the Census Bureau and I am always being asked for a way by which people who wish to analyze our data either across different geographic boundary definitions or over time wherein boundaries changed. It would be so awesome if you guys could open-source your algorithm so that we could share it with the world of folks who need something like this :)

    13 votes
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  14. 1 vote
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  15. 1 vote
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  16. Description error

    On page http://sedac.ciesin.columbia.edu/data/set/sdei-global-annual-avg-pm2-5-2001-2010
    It says that 30 arc-mins is aprox 50 sq. km is wrong. You need to remove the sq.

    30 arc-mins is aprox 50 km at the equator.

    1 vote
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  17. Make it mobile / cell friendly

    On Android (not in desktop mode), I can activate neither the poly nor radius icon.

    Please also add a (link to a) help file. Thx, A

    1 vote
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  18. Mangrove data errors

    Many of the mangrove rasters are empty.

    1 vote
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  19. error in your maps -----CORRECT THIS MAP

    You list this map as "Buenos Aires, Brazil" -- Buenos Aires is in Argentina -- the capital of Brazil is Brasilia. SO which map is this, Buenos Aires or Brasilia??????

    http://sedac.ciesin.columbia.edu/maps/gallery/search?facets=theme:remote-sensing&facets=region:south%20america

    1 vote
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  20. SEDAC RSS feed is broken?

    You have an RSS icon on your main page that links to http://ciesin.columbia.edu/rest/rss/sedacnews, but the page says "Sorry... Page Not Found".

    ???

    1 vote
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