[gdal-dev] Convert TIF to BIL

[Cainã K. Campos]

On Tue, Mar 10, 2020 at 8:47 AM Cainã K. Campos <rupestre.campos at gmail.com>
wrote:

> Bret,
>
> based on the link sent
> https://www.softwright.com/faq/support/toposcript_bil_file_format.html
> looks like the .blw file is not just the .tfw file renamed, as  it should
> have other kind of parameters such pixel size, raster rotation. Check if
> your .blw matches the example in the link, if not you can easily create one
> with a .txt file renamed to .blw.
> I believe that the .tfw should be renamed to .prj as described in doc, and
> check if formats match also in the .prj generated with documented
>
> In order to reproject raster to decimal degrees you should use gdalwarp
> with the -t_srs flag, and choose a degree projection like EPSG:4326, you
> may do it before translating to .BIL , like:
>
> gdalwarp -t_srs EPSG:4326 input.tif output.tif
>
> Caina
>
> On Mon, Mar 9, 2020 at 8:23 PM Bret Johnson <bret.johnson at utcg.com> wrote:
>
>> Based on that, it looks like my program requires coordinates in decimal
>> degrees and my files are not in that format.  How do I force the output
>> into the correct (decimal degrees) format?
>>
>> -----Original Message-----
>> From: nhv <nhv at meganet.net>
>> Sent: Monday, March 9, 2020 9:56 AM
>> To: Bret Johnson <bret.johnson at utcg.com>; Jeff McKenna <
>> jmckenna at gatewaygeomatics.com>; gdal-dev at lists.osgeo.org
>> Subject: Re: [gdal-dev] Convert TIF to BIL
>>
>> This might help
>> https://www.softwright.com/faq/support/toposcript_bil_file_format.html
>>
>> ---- Original Message ----
>> From: "Bret Johnson" <bret.johnson at utcg.com>
>> Sent: 3/9/2020 11:08:20 AM
>> To: "Jeff McKenna" <jmckenna at gatewaygeomatics.com>, "
>> gdal-dev at lists.osgeo.org" <gdal-dev at lists.osgeo.org>
>> Subject: Re: [gdal-dev] Convert TIF to BIL
>>
>> The program is made by SoftWright and is called TAP, which is used for
>> radio propagation analysis.  The relevant parts of the error message are:
>>
>> Note that 1 file(s) were found that were not indexed because of errors.
>> There could be errors in the data file(s), or these could be files that are
>> NOT topo data files that the program tested to try to index and failed.
>>
>> Like, I said, pretty generic and not very helpful.
>>
>> -----Original Message-----
>> From: gdal-dev <gdal-dev-bounces at lists.osgeo.org> On Behalf Of Jeff
>> McKenna
>> Sent: Monday, March 9, 2020 8:50 AM
>> To: gdal-dev at lists.osgeo.org
>> Subject: Re: [gdal-dev] Convert TIF to BIL
>>
>> Hi Bret, what is the exact error message?
>>
>> -jeff
>>
>>
>> --
>> Jeff McKenna
>> MapServer Consulting and Training Services https://gatewaygeomatics.com/
>>
>>
>>
>>
>> On 2020-03-06 8:19 p.m., Bret Johnson wrote:
>> > Even:
>> >
>> > Thanks.  That worked to create a World file, so I made it past the
>> error message.  It's still not importing correctly and the error message is
>> so generic that it's useless (basically just says it doesn't like the
>> data).  I'll do some more playing.
>> >
>> > -----Original Message-----
>> > From: Even Rouault <even.rouault at spatialys.com>
>> > Sent: Friday, March 6, 2020 1:15 PM
>> > To: gdal-dev at lists.osgeo.org
>> > Cc: Bret Johnson <bret.johnson at utcg.com>
>> > Subject: Re: [gdal-dev] Convert TIF to BIL
>> >
>> > Bret,
>> >
>> >> I have some GeoTIFF (.TIF) files that a program I'm using won't
>> >> accept.  It will accept .BIL files and I'm using GDAL to try and do
>> the conversion.
>> >> When I do, GDAL_TRANSLATE says it worked and it generates a few files
>> >> (including a .BIL), but it doesn't create the .BLW file where all of
>> >> the "real" data should be.  Is there some special GDAL_TRANSLATE
>> >> option or use or some special format GeoTIFF data needs to be in for
>> >> it to work properly and generate a .BLW file?
>> >
>> > I don't know which output driver you use (EHdr, ENVI etc.), but they
>> aren't likely to produce a .blw worldfile as they will generate a text
>> header file specific to the format.
>> >
>> > To generate a .blw file you can do:
>> >
>> > gdal_translate your_input.tif tmp.tif -co TFW=YES
>> >
>> > This will generate a tmp.tfw file. Just rename it to .blw and with the
>> basename of your BIL output file.
>> >
>> > Even
>> >
>> > --
>> > Spatialys - Geospatial professional services http://www.spatialys.com
>> > _______________________________________________
>> > gdal-dev mailing list
>> > gdal-dev at lists.osgeo.org
>> > https://lists.osgeo.org/mailman/listinfo/gdal-dev
>> >
>>
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