[gdal-dev] Reading contents of Erdas Block File

[Ryan]

Looking around the source for the HFA driver I was able to find
hfatest.cpp. I compiled that and got what I needed with the -dt option.
Problem solved!


-Ryan


On Fri, May 30, 2014 at 9:10 AM, Ryan <troll1602 at gmail.com> wrote:

> Erdas has some example data:
>
> http://download.intergraph.com/downloads/imagine-photogrammetry-and-lps-example-data
>
> It's a large zip (~900Mb) so I attached just the important image/block
> file/doc.
>
> -Ryan
>
>
>
>
> On Fri, May 30, 2014 at 12:51 AM, Even Rouault <
> even.rouault at mines-paris.org> wrote:
>
>>  On Thursday 29 May 2014 16:42:35 Ryan wrote:
>>
>> > There is a set of images (a handful of .img) and only one block file. I
>> can
>>
>> > open any of the images but that doesn't seem to access the metadata
>> that's
>>
>> > stored on the block file.
>>
>>
>>
>> Access to the .blk and one of the .img could be useful for investigation.
>>
>>
>>
>> >
>>
>> > -Ryan
>>
>> >
>>
>> >
>>
>> > On Thu, May 29, 2014 at 3:24 PM, Even Rouault <
>> even.rouault at mines-paris.org>
>>
>> > wrote:
>>
>> > > On Thursday 29 May 2014 12:41:17 Ryan wrote:
>>
>> > > > I have some imagery that has metadata stored in Erdas Block Files
>> (.blk)
>>
>> > > >
>>
>> > > > that I am having a hard time reading.
>>
>> > > >
>>
>> > > >
>>
>> > > >
>>
>> > > > It likes the data is stored in an HFA Header, when viewing the file
>> (cat
>>
>> > >
>>
>> > > or
>>
>> > >
>>
>> > > > less) it begins with "EHFA_HEADER_TAG".
>>
>> > > >
>>
>> > > >
>>
>> > > >
>>
>> > > > However, there are no raster bands so using gdalinfo or GDALOpen
>> errors
>>
>> > >
>>
>> > > out
>>
>> > >
>>
>> > > > with:
>>
>> > > >
>>
>> > > > ERROR 1: Unable to open image_name_file.blk, it has zero usable
>> bands.
>>
>> > >
>>
>> > > Did you try opening the main file, the .img ?
>>
>> > >
>>
>> > > > Any ideas on reading this kind of file?
>>
>> > > >
>>
>> > > >
>>
>> > > >
>>
>> > > > -Ryan
>>
>> > >
>>
>> > > --
>>
>> > >
>>
>> > > Geospatial professional services
>>
>> > >
>>
>> > > http://even.rouault.free.fr/services.html
>>
>> --
>>
>> Geospatial professional services
>>
>> http://even.rouault.free.fr/services.html
>>
>
>
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