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  1. comparison between GPWv3, GRUMP and worldpop

    I found large inconsistencies for population count in Tanzania between GPW 2010 and worldpop 2010 at the district level (2002 boundaries). It looks like GRUMP is more comparable, but it is difficult to compare as GRUMP is not available for 2010. Do you know the reason for the inconsistencies? and would you recommend GPW or GRUMP when calculating population at the district level? Finally, will GRUMP be available for later years in the near future?

    Best,
    Julie

    1 vote
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      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
    • Can I get annual PM2.5 data from 1998 to 2012?

      The Global Annual PM2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD) data sets represent a series of three-year running mean grids (1998-2012) of fine particulate matter. Can I get annual data from this dataset?

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        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • Values in gl_grumpv1_ntlbndid_ascii_30 don’t match between .dbf and .asc files

        I’m looking at the identifier grid file, and the values in the gluntlbnds.dbf file don't match the content of the data in gluntlbnds.asc. For example, when I inspect the 1x1 degree area surrounding the point where Poland, Germany, and the Czech Republic meet, I see the values 167, 52, and 51. In the .dbf file, these should be 137, 111, and 110 respectively.

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          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
        • consider removing logins

          Every semester, I required my environmental science college class to go to your website and browse through your biome maps to find their "home" biome. However, since you now require people to create an account, I have had to direct my students to other, lower quality maps elsewhere. I don't want them to have to spend 5 minutes creating a login just to use the site for few minutes and I certainly don't want them to all have to give up their email address. These are students, not data points.

          If the purpose of your site providing information to the…

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            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
          • Human Influence Index 2005-2014?

            I am looking at the possibility of using the HII to understand anthropogenic impact on North American birds as a part of my graduate research. I noticed that the data available is for 1995-2004 and was wondering if 2005-14 is on the works. SO my questions are: 1. Are you working on HII 2005-14? and 2. If you are, will the data be publicly available? When? Thanks.

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              0 comments  ·  Flag idea as inappropriate…  ·  Admin →

              Hi,

              There are plans to update the HII. However, we are waiting for the updates to the input data layers of HII. An updated HII may not be available until next year.

              To be notified of the latest data releases, including HII and related news that may interest you, please consider following SEDAC on twitter (twitter.com/ciesin) or Facebook (Socioeconomic Data and Applications Center).

              Lisa Lukang
              User Services

            • WMS Improvement

              Thank you for providing yours data and service.

              I have two suggestion for your server configuration that can improve your WMS

              1) Can you make the content available via HTTPS? (https://developer.mozilla.org/en-US/docs/Security/MixedContent/How_to_fix_website_with_mixed_content)

              2) Can you adding CORS support to the server? (http://www.html5rocks.com/en/tutorials/cors/#toc-adding-cors-support-to-the-server)

              Thank you for your kind cooperation.

              5 votes
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                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
              • fill in Northern Pakistan

                I thought I had a bad download, but the documentation shows a hole in N. Pakistan. This area is filled in VMAP, so it seems like that area could be filled. Is there a version of groads asia that includes this?

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                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                • ... check the ascii population density (2000) dataset for the Philippines.

                  It appears to be erroneous. It doesn't show the correct map of the Philippines. I had to use the Asia dataset to get the correct map.

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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Download doesn't work

                    on this page: http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density/data-download
                    After I logged in, filled all the fields (region>global>Pop Density grid>grid>2.5'>2000), and hit "Download", nothing happens. I tried with Google Chrome and Mozilla Firefox.

                    2 votes
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                      2 comments  ·  Flag idea as inappropriate…  ·  Admin →

                      Thanks for the feedback. Checking it now. It seems to be working on those browsers for me at the moment. Please try downloading again but bypass logging in by using the ’Guest Download" button at the bottom of the login/signup page that comes up after clicking the download button. Hope that makes some sense. Let us know if you continue have problems.

                    • Do this all for the 2010 census?

                      I would love information on population density etc. from the most recent census. Is there a reason this is only the 2000 data?

                      5 votes
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                        planned  ·  1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                      • Check the Global Fertilizer and Manure, v1 GeoTIFFs.

                        I downloaded the Africa geoTIFF and opened it in Google Earth Pro. All I got was country outlines with a black background...

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                        • provide .qml file with appropriate color map

                          I am not sure of what color ramp to use to visualise Global Human Footprint appropriately in my maps and legends. Would be great if you would provide a .qml file with style that fits your index.

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                            0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • Socioeconomic data for Alabama

                            I was hoping to get socioeceonomic data for Alabama, this would be great if this could be mapped.

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                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • 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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                                0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                              • Hong Kong Urban Extent (GRUMP)

                                The map for the Hong Kong Urban Extent (GRUMP v1) is incorrect - it shows NO urban extent, and Hong Kong is very urban...
                                http://sedac.ciesin.columbia.edu/downloads/maps/grump-v1/grump-v1-urban-extents/hkgextents.png

                                1 vote
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • EPI for South Africa

                                  I would like to amke a study on hpw to improve the EPI of South Africa.How did EPI came to being. When was it formed

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                                  • Is there any way to download maps in a georreferenced .tif file? Thanks.

                                    The closest way i figured is to download the ascii file and import it as a raster, but it has no spatial reference.

                                    Thank you beforehand

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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • make downloads resumable

                                      Very large data-sets (e.g., global roads at ~200MB) are very difficult to download at one go when in poor/unreliable bandwidth areas. Suggest one or more of the following:
                                      1. breakup data sets into smaller regional and/or country level chunks
                                      2. allow downloads to resume after interruption
                                      3. use distributed methods of serving data (p2p, torrents, etc) ... this will also reduce your server / bandwidth requirements!

                                      4 votes
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                                        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                      • information about data encoding

                                        Hello,

                                        I downloaded "Gridded Population of the World, Version 3 (GPWv3): Centroids". It is really terrific data! Bravo!

                                        But I must say that I wasn't able to use correctly administrative level names: problems with diacritic symbols (like "ñ", "ç", "à" etc.).

                                        I couldn't identify encoding of data (unicode, ISO8859-1, ?). So please could you give information about this encoding (inside metadata?).

                                        Thanks in advance.
                                        Michel (France)

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                                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                        • 1 vote
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