Re: [Qgis-user] VIIRS geolocation data

[Andre Joost]

Hi Mitch,

you should better include the whole list in your reply, so that others 
can benefit (or help).


If you want to run gdal commands in a QGIS installation, you have to run 
the OSGE4W shell, then enter commands inside the shell.


This looks quite old-fashioned, and you need to remember old 
DOS-commands to navigate between folders, but otherwise the environment 
for GDAL is not setup correctly.



Am 11.05.2015 um 21:56 schrieb Dr. Mitchell Andrew Schull:

Andre,

My gdal doesn’t recognize VIIRS datasets now!  Its odd because gdal
works perfectly in qGIS.  Any idea why all the gdal capability is not
available in qGIS?  I could just do it in the customized gdal scripts
in gdal_transform but it doesn’t allow me.

Mitch


On May 9, 2015, at 6:54 AM, Andre Joost
 wrote:

Am 09.05.2015 um 02:38 schrieb Noli Sicad:

http://www.nsof.class.noaa.gov/saa/products/search?datatype_family=VIIRS




Is this raster data?


I think you have georeferenced it.

http://www.digital-geography.com/qgis-tutorial-i-how-to-georeference-a-map/#.VU1W52a23FQ






It is not that easy. The data is raw data from a satellite flight. The 
HDF contains several subdatasets, including longitude and latitudes of 
every cell. Unfortunately, the cell coordinates are not equally spaced, 
and there is no CRS given.


The best result I get is transforming the longitude, latitude and
aerosol subdatasets with gdal_transform to XYZ format, then stitch
them together with LibreOffice Calc, and import them as delimited
text.

It is possible to extract single bands with gdalwarp. This seems to
work, but the GCP information inside the file is wrong. Longitudes
are added by 180°, and the last line of GCP matches 0/0 to 0/0,
which makes no sense to me.

Reading the data with python code inside a plugin might be an
alternative.

Greetings, André Joost


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Re: [Qgis-user] VIIRS geolocation data

[Andre Joost]

Am 09.05.2015 um 02:38 schrieb Noli Sicad:

http://www.nsof.class.noaa.gov/saa/products/search?datatype_family=VIIRS

Is this raster data?

I think you have georeferenced it.

http://www.digital-geography.com/qgis-tutorial-i-how-to-georeference-a-map/#.VU1W52a23FQ



It is not that easy. The data is raw data from a satellite flight. The 
HDF contains several subdatasets, including longitude and latitudes of 
every cell. Unfortunately, the cell coordinates are not equally spaced, 
and there is no CRS given.


The best result I get is transforming the longitude, latitude and 
aerosol subdatasets with gdal_transform to XYZ format, then stitch them 
together with LibreOffice Calc, and import them as delimited text.


It is possible to extract single bands with gdalwarp. This seems to 
work, but the GCP information inside the file is wrong. Longitudes are 
added by 180°, and the last line of GCP matches 0/0 to 0/0, which makes 
no sense to me.


Reading the data with python code inside a plugin might be an alternative.

Greetings,
André Joost


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Re: [Qgis-user] VIIRS geolocation data

[Noli Sicad]

http://www.nsof.class.noaa.gov/saa/products/search?datatype_family=VIIRS

Is this raster data?

I think you have georeferenced it.

http://www.digital-geography.com/qgis-tutorial-i-how-to-georeference-a-map/#.VU1W52a23FQ

Noli

On 5/9/15, Dr. Mitchell Andrew Schull  wrote:
> Thanks!  Yes I realize that the OTB plugin will be very useful.  I’m still
> having issues with adding the lat lon information to VIIRS.
>
> Mitch
> 
> Mitchell A. Schull, Ph.D.
> Scientific Analyst
> NOAA / NESDIS / STAR
> Earth Resources Technology, Inc.
> 5830 University Research Court, Suite 2842
> College Park, MD
> Tel: 301-683-3558
> Email: mitch.sch...@noaa.gov
> 
>
>> On May 8, 2015, at 8:16 PM, Noli Sicad  wrote:
>>
>> Hi Mitch,
>>
>> For ENVI replacement, install QGIS OTB Plugin, then have a look at the
>> "Processing" in the menu.
>>
>> Here's an example,
>>
>> http://opensourcegisblog.blogspot.com.au/2014/08/image-processing-using-orfeo-toolbox-in.html
>>
>>
>> Noli
>>
>>
>>
>> On 5/9/15, Dr. Mitchell Andrew Schull  wrote:
>>> Hi all,
>>>
>>> I’m a new qGIS user (yesterday).  I’m trying to find a good ENVI
>>> replacement
>>> and it seems like qGIS is pretty good.  One of the nice features is the
>>> ability to quickly map your data on Google Earth without having to create
>>> a
>>> KML via GEarth_View.  Unfortunately if your data is not properly
>>> referenced
>>> it doesn’t work. That all being said I am running into the issue where I
>>> can
>>> open VIIRS data which is awesome however even though it has Lat and Lon
>>> info
>>> given as separate layers in the H5 product there doesn’t seem to be a way
>>> to
>>> add it to the file and possibly create a geotiff.  Of course then I
>>> cannot
>>> use Google Earth.  I would also like to overlap imagery for analysis so
>>> its
>>> annoying.  Any ideas?  Anybody wrote a plugin for this?
>>>
>>> Thanks
>>>
>>> Mitch
>>>
>>>
>
>
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Re: [Qgis-user] VIIRS geolocation data

[Dr. Mitchell Andrew Schull]

Thanks!  Yes I realize that the OTB plugin will be very useful.  I’m still 
having issues with adding the lat lon information to VIIRS.

Mitch

Mitchell A. Schull, Ph.D.
Scientific Analyst
NOAA / NESDIS / STAR
Earth Resources Technology, Inc.
5830 University Research Court, Suite 2842
College Park, MD
Tel: 301-683-3558
Email: mitch.sch...@noaa.gov


> On May 8, 2015, at 8:16 PM, Noli Sicad  wrote:
> 
> Hi Mitch,
> 
> For ENVI replacement, install QGIS OTB Plugin, then have a look at the
> "Processing" in the menu.
> 
> Here's an example,
> 
> http://opensourcegisblog.blogspot.com.au/2014/08/image-processing-using-orfeo-toolbox-in.html
> 
> 
> Noli
> 
> 
> 
> On 5/9/15, Dr. Mitchell Andrew Schull  wrote:
>> Hi all,
>> 
>> I’m a new qGIS user (yesterday).  I’m trying to find a good ENVI replacement
>> and it seems like qGIS is pretty good.  One of the nice features is the
>> ability to quickly map your data on Google Earth without having to create a
>> KML via GEarth_View.  Unfortunately if your data is not properly referenced
>> it doesn’t work. That all being said I am running into the issue where I can
>> open VIIRS data which is awesome however even though it has Lat and Lon info
>> given as separate layers in the H5 product there doesn’t seem to be a way to
>> add it to the file and possibly create a geotiff.  Of course then I cannot
>> use Google Earth.  I would also like to overlap imagery for analysis so its
>> annoying.  Any ideas?  Anybody wrote a plugin for this?
>> 
>> Thanks
>> 
>> Mitch
>> 
>> 

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Re: [Qgis-user] VIIRS geolocation data

[Noli Sicad]

Hi Mitch,

For ENVI replacement, install QGIS OTB Plugin, then have a look at the
"Processing" in the menu.

Here's an example,

http://opensourcegisblog.blogspot.com.au/2014/08/image-processing-using-orfeo-toolbox-in.html


Noli



On 5/9/15, Dr. Mitchell Andrew Schull  wrote:
> Hi all,
>
> I’m a new qGIS user (yesterday).  I’m trying to find a good ENVI replacement
> and it seems like qGIS is pretty good.  One of the nice features is the
> ability to quickly map your data on Google Earth without having to create a
> KML via GEarth_View.  Unfortunately if your data is not properly referenced
> it doesn’t work. That all being said I am running into the issue where I can
> open VIIRS data which is awesome however even though it has Lat and Lon info
> given as separate layers in the H5 product there doesn’t seem to be a way to
> add it to the file and possibly create a geotiff.  Of course then I cannot
> use Google Earth.  I would also like to overlap imagery for analysis so its
> annoying.  Any ideas?  Anybody wrote a plugin for this?
>
> Thanks
>
> Mitch
>
>
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Re: [Qgis-user] VIIRS geolocation data

[Nicolas Cadieux]

Hi,
Welcome to QGIS!

You will probably enjoy the semi-Automatic Classification Plugin then! 
You can also look at Opticks 
http://opticks.org/confluence/display/opticks/Welcome+To+Opticks

I have not used the VIIRS data but have you tried using the GDAL 
Georeferencer plugin?  If you have coordinates of all 4 corners, it 
should be easy to do.  Be careful of the chosen algorithm unless you 
don't mind changing the data.

Also, you can try using a world file if you first export it to a .tiff 
(Raster/conversion/Translate)

This is was a test.tiffw wold file looks like.  It would georeference 
test.tiff if found in the same directory.
0.00185013204225353
0
0
-0.00185013204225353
-74.04486388644366457
46.02451243397887737

Go here for more information.
http://en.wikipedia.org/wiki/World_file

Hope this helps
Nicolas Cadieux



Le 2015-05-08 16:13, Dr. Mitchell Andrew Schull [via OSGeo.org] a écrit :
> Hi all,
>
> I’m a new qGIS user (yesterday).  I’m trying to find a good ENVI 
> replacement and it seems like qGIS is pretty good.  One of the nice 
> features is the ability to quickly map your data on Google Earth 
> without having to create a KML via GEarth_View.  Unfortunately if your 
> data is not properly referenced it doesn’t work. That all being said I 
> am running into the issue where I can open VIIRS data which is awesome 
> however even though it has Lat and Lon info given as separate layers 
> in the H5 product there doesn’t seem to be a way to add it to the file 
> and possibly create a geotiff.  Of course then I cannot use Google 
> Earth.  I would also like to overlap imagery for analysis so its 
> annoying.  Any ideas?  Anybody wrote a plugin for this?
>
> Thanks
>
> Mitch
>
>
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[Qgis-user] VIIRS geolocation data

[Dr. Mitchell Andrew Schull]

Hi all,

I’m a new qGIS user (yesterday).  I’m trying to find a good ENVI replacement 
and it seems like qGIS is pretty good.  One of the nice features is the ability 
to quickly map your data on Google Earth without having to create a KML via 
GEarth_View.  Unfortunately if your data is not properly referenced it doesn’t 
work. That all being said I am running into the issue where I can open VIIRS 
data which is awesome however even though it has Lat and Lon info given as 
separate layers in the H5 product there doesn’t seem to be a way to add it to 
the file and possibly create a geotiff.  Of course then I cannot use Google 
Earth.  I would also like to overlap imagery for analysis so its annoying.  Any 
ideas?  Anybody wrote a plugin for this?

Thanks

Mitch

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