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106 results found

  1. Monthly data

    Well its good we have annual data of AOD PM 2.5 but it is much more helpful if we have monthly data and seasonal data also. It gives us opportunity to have a close look of analysis

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  2. Correct obvious mistakes

    Strangely, several countries partially lack data, with an outcome that some of the largest cities in the world are missing: Guangzhou-Hong Kong conurbation 70 million people; Copenhagen (one third of Denmark's population); Brussels and most Flanders (50% of Belgium's population); Buenos Aires (one third of Argentina's population on #2 city in South America) etc.

    1 vote
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  3. HDF-EOS Updates, June 2019

    Greetings from The HDF Group!

    The June newsletter describing changes to the HDF-EOS web site and updates to the HDF software, from March 2019 through June 2019, can be found here:

    https://portal.hdfgroup.org/display/support/June+2019

    Let us know if you have any questions or comments!

    -Barbara

    Barbara Jones
    HDF Helpdesk
    The HDF Group

    1 vote
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  4. 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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  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.

    4 votes
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  6. 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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  7. 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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  8. 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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  9. 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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  10. 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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  11. 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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  12. Fire Ants Queensland Australia

    1 vote
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  13. 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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  14. 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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  15. 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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  16. jamesbajo@yahoo.com

    jamesbajo@yahoo.com

    1 vote
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  17. Home page has lots of link that are NOT working

    Please fix

    1 vote
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  18. 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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  19. 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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  20. Mangrove data errors

    Many of the mangrove rasters are empty.

    1 vote
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