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Pocket Streets MPS file format

This is a discussion on Pocket Streets MPS file format within the MapPoint Desktop Discussion forums, part of the Map Forums category; Folks, Is there anyone that can direct me to information on how the MPS files of Pocket Streets are formatted? ...

  1. #1
    Anonymous is offline Senior Member Black Belt
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    Pocket Streets MPS file format

    Folks,

    Is there anyone that can direct me to information on how the MPS files of Pocket Streets are formatted? I've heard they are just Access 2000 databases with headers, but can't seem to find any concrete information.

    Really, all I'm looking for is the data on the top left and bottom right coordinates of the particular map. I want to read this information from the file though for a program on the iPaq.

    Regards,

    Jason

  2. #2
    Eric Frost's Avatar
    Eric Frost is offline Administrator Black Belt
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    I haven't seen the mps format documented anywhere, sorry. Where did you hear it was Access format?
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  3. #3
    Anonymous is offline Senior Member Black Belt
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    I found a vague reference in a web search that it had a special header but the bulk of the file was Access 2000 format. I couldn't really see that from looking at a hex dump of a sample file.

    Jason

  4. #4
    mjmahoney is offline Junior Member White Belt
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    MPS Data Format

    Has anyone had any luck finding it. I've been looking for it also?

  5. #5
    Eric Frost's Avatar
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    I'm still curious myself.. some guys in here figured out that the demographics mdb passw is very weak, but I would imagine they would make the .mps files more secure as they have the more valuable cartographic data.

    Eric
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  6. #6
    Sunlight is offline Junior Member White Belt
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    As far as I can tell, the MPS files don't have much to do with Access - or any other standard format, for that matter.

    They're somewhat bizarre. They're not encrypted. Text is in a mixture of Unicode and non-Unicode. Some strings have their length specified, some have a zero to end them. Some strings are stored verbose, some compressed using a peculiar common prefix elimination method. There seems to be masses of padding, using both zeros and a 2-byte padding number, but it's not padded to any sensible boundaries.

    Anyone fancy having a look to figure them out?
    Sunlight

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