Certain ZIP files only with GM12?

dannodanno Global Mapper UserPosts: 9
edited April 2012 in Bug Report
SRTM1 DEM Global Data from DLR are zipped in 258 files. Obviously, these ZIPs can be read only into GM12. Before I tried with GM11, now with GM13 - no success: "Error extracting E000N00_SRTM1DEM.asc. Damaged or not a zip file."

Surely I could work around by "re-zipping" this data set (69.9 GB), but this seems not to be the general solution. Please give support.

Regards, Ralf

(File description see PDF)

Comments

  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited December 2011
    Ralf,

    There are some corrupted .zip files that Global Mapper v13 wouldn't read that earlier versions would. We have just updated GM 13 to now read those again and just ignore the corruption. I have placed a new build at http://www.globalmapper.com/global_mapper13.zip with the change for you to try. Simply download that file and extract the contents into your existing v13.xx installation folder to give it a try. If you are using the 64-bit v13 version there is a new build at http://www.globalmapper.com/global_mapper13_64bit.zip .

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • dannodanno Global Mapper User Posts: 9
    edited December 2011
    Mike,

    I tried the new version, 32-bit as well as 64-bit, but it doesn't work. GM12_64-bit, however, does.
    When I downloaded these data from DLR in June, I made an "amputation" of the original ZIPs by means of 7-zip, to preserve only the .asc files. But could this lead to corrupted ZIP files?

    It is Saturday afternoon now, you should think of your weekend too. Let's continue on Monday.

    Regards, Ralf
  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited December 2011
    Ralf,

    If you can provide a sample file I can take a look and see exactly where the un-zip library is failing on them and why v12 did not. Could be that 7-zip is doing something incorrectly.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • dannodanno Global Mapper User Posts: 9
    edited December 2011
    Mike,

    You are unbelievable, maybe a workoholic? - Attached I uploaded the smallest of the ZIPs showing the error (W030N30_SRTM1DEM). There are some other small ones that work; the smallest of them (W060N10_SRTM1DEM) added too.

    Thanks, Ralf
  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited December 2011
    Ralf,

    I took a look and was update Global Mapper to ignore the problems in your .zip and it loads ok. Just looks like some invalid encoding at the end of the .zip but nothing that affects the data. I have placed a new build at http://www.globalmapper.com/global_mapper13.zip with the change for you to try. Simply download that file and extract the contents into your existing v13.xx installation folder to give it a try. If you are using the 64-bit v13 version there is a new build at http://www.globalmapper.com/global_mapper13_64bit.zip .

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
  • dannodanno Global Mapper User Posts: 9
    edited December 2011
    Mike,

    It is working now. Thank you for your efficient assistance. We from the GM user family can consider ourselves lucky to have you as our GURU!

    Regards, Ralf
  • frankphilipsfrankphilips Global Mapper User Posts: 1
    edited April 2012
    danno wrote: »
    SRTM1 DEM Global Data from DLR are zipped in 258 files. Obviously, these ZIPs can be read only into GM12. Before I tried with GM11, now with GM13 - no success: "Error extracting E000N00_SRTM1DEM.asc. Damaged or not a zip file."

    Surely I could work around by "re-zipping" this data set (69.9 GB), but this seems not to be the general solution. Please give support.

    Regards, Ralf

    (File description see PDF)
    I should advise you tool below. It restores zip files in such cases as - file cannot open, invalid or corrupt archive, crc errors and etc.



    zip file recovery



    utility also repairs huge .zip archives which reach 2GB up and more
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