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I have an algorithm that gets 3600x3600 elevation matrix from DTED2 files. I have encountered a problem when processing some of the files. It seems that Data Edition Number value in Data Set Identification Record block is empty. When my algorithm is in this step (processing Data Edition Number) my program skips this file and starts to read the next one. Is it a crucial information that can interrupt the creation of elevation matrix?

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  • Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Commented Mar 15 at 12:20
  • It's been 20 years since I last read the DTED specification, but since it's a MILSPEC, I am sure it specifies what is required. Obviously your code seems to think it's required. Note that DTED2 files are 3601x3601, except when they're 3601x1801 or 3601x901. Where are you getting the non-conforming data? Isn't this really a question for your provider? Commented Mar 15 at 13:18
  • The DTAD files/tiles are 3601x3601, but because the adjacent files have an overlap of one pixel row and column, I think it is not totally wrong to consider that they are 3600x3600. Commented Mar 15 at 14:14
  • By the definition data presents always some edition: "Data edition number - The number assigned to the data indicating either original compilation (Edition 1) or subsequent replacements of the data (Editions 2, 3, etc.) in the Data Base (DB) to achieve accuracy requirements (recompilation) or currency/specification requirements (revision).The data edition number does not reflect the number of replacements made to the data to effect boundary matches. " So it is wrong not to have the edition number, but it is another thing if it matters in your use case. Commented Mar 15 at 14:27

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