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    1. How was the Data Context layer created?

    2. What year(s) is this data from?

    3. What years are the data available for?

    4. How should I cite the GPWv4 data?

    5. How should I cite the GPW3 data?

    6. What source data is used in GPWv4?

    7. What is the projection used for the data?

    8. What is the projection used for the GPWv4 data?

    9. I see you have country-level estimates for the low elevation coastal zone data. Is it possible to get the gridded data?

    10. What are the restrictions on use and redissemination of data?

    11. We have been using the GPW data extensively, but one question I cannot understand is why the data appear not to be available in database format rather than GIS format.

    12. What are the restrictions on use and redissemination of data?

    13. In GPWv3, what exactly does "No Data" (-9999) mean?

    14. I would like to download GPW and GRUMP data, but I'd like to know if it is possible to download files by some coordinate extent, rather than by country?

    15. In the Urban extents data, how were the urban areas identified?

    16. How is a global raster created from tabular census data and boundaries?

    17. I was excited to see you have anthropogenic biome data, which would be useful in my research. What are the differences between the Anthropogenic Biomes of the World, v1 data and the Anthropogenic Biomes of the World, v2 data for 2000?

    18. Which are the last updated and the next scheduled GPW collected data?

    19. Why can't I make the Import71 work with the GPW data?

    20. What is the main strength of the data?

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