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Archive Database File Sizes

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9 comments

  • Nathan

    I do know we will not split the DB over multiple files.

    Worse, we may not detect if the DB is full on that file system, based on the error messages we get back - we are working on that. 

    I would guess that breaking UK into 5 or so different pieces will give you something of the right size.

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  • Steve Ackroyd

    OK, I guess that I'll have to wait until the CyanogenMod developers fix that glaring extFAT bug, before building my full UK offline map in BCN.

    I have another question related to the UK OS maps, which looks like it could be a bug in BCN...

    The OS maps display perfectly from zoom scales 10 through 20, however, zoom scales below 10 either do not display at all, or do so erratically.  BING maps on-line scale out quite happily from the 1:50K OS mapping to a larger scale map, although it does not appear to be an OS map.  I am curious as to why BCN does not do exactly what BING does when scaling out.  Ideally, BCN would scale out to the OS 1:250K road atlas, which is offered as a free download by some other mapping applications such as ViewRanger.  However, if this is not feasible, then any large scale map of the UK would be far more user friendly than white squares currently displayed by BCN.

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  • Steve Ackroyd

    Screenshot of UK OS map at zoom level 9 attached...




    20-04-13_18-22-45[1].jpg
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  • Steve Ackroyd

    I've given up on the idea of an offline DB of the entire UK at both 1:50K and 1:25K scales, simply because of the sheer size of the DB files.  On Memory-Map on my WM6.1 PDA, I could get the same coverage plus the 1:250K road atlas in less than 24Gb.  Unfortunately, it is clear to me that doing the same in BCN would consume FAR more space than this and possibly exceed my 64Gb SD.  As the SD is also used for my MP3 collection, plus some other apps, this is a complete non-starter.  It's a shame really, as I was hoping that BCN could match, if not exceed, the storage efficiency of MM, but patently it cannot.

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  • Nathan

    First, can you post the link to where you are looking at Bing?

    For my benefit, how big of files do you expect to be allowed with extFAT?

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  • Steve Ackroyd

    www.bing.com then select Maps and choose Road --> Ordnance Survey Map

    This shows 1:50K and 1:25K as per BCN, but also a larger scale map that incorporates several zoom levels.

    The link is http://www.bing.com/maps/?FORM=HDRSC4 but this seems to be generic, ie. it does not change as the map scales in and out.

    I've attached a screenshot of the UK overview map shown by Bing.  It would be great if you could get this incorporated with the other OS maps in BCN.

    Max file size on exFAT is 16 Exabyte - not quite sure what an Exabyte is, but it sounds pretty huge !




    OS Atlas.pdf
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  • Nathan

    I couldn't properly preview because the Ordnance Survey option doesn't come up for me when viewing from outside the UK.

    Anyway, this used to work, and we can find something to substitute that level.

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  • Steve Ackroyd

    That's brilliant - I'll look forward to it.

    Just to set my expectation level, what is the typical ETA for such things... days, weeks months or years?

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  • Nathan

    Week(s).

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