Below you find MD5 Checksum and exact File Size to verify your gmapsupp_contours_austria20m.7z download. These contourlines have 20m equidistance. If you clicked on MD5 in error - the actual download is by clicking on the country name left of MD5 How to find out the MD5 Checksum of a file: Windows: you can check with many tools e.g. www.winmd5.com Linux or Mac OSx: you can use md5sum or shasum command in Terminal to check md5 checksum. i.e.: 'md5sum gmapsupp_contours_austria20m.7z' MD5 Checksum: 2f19c95e89565b3c91acb9273ae28a9c gmapsupp_contours_austria20m.7z Date last modified: Filesize in bytes: 2023-06-05 22:57:29 CEST 95158972 gmapsupp_contours_austria20m.7z