Re: [gdal-dev] Use of gdalwarp to make GeoTiff transparent is flipping the image

2016-03-09 Thread Liglio 
Driver: GTiff/GeoTIFF
Files: E:\Images\image.tif
Size is 982, 1108
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (-58.44952010001,-34.57139910001)
Pixel Size = (0.020016536493374,0.020014199367660)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  ( -58.4495201, -34.5713991) ( 58d26'58.27"W, 34d34'17.04"S)
Lower Left  ( -58.4495201, -12.3956662) ( 58d26'58.27"W, 12d23'44.40"S)
Upper Right ( -38.7932813, -34.5713991) ( 38d47'35.81"W, 34d34'17.04"S)
Lower Right ( -38.7932813, -12.3956662) ( 38d47'35.81"W, 12d23'44.40"S)
Center  ( -48.6214007, -23.4835327) ( 48d37'17.04"W, 23d29' 0.72"S)
Band 1 Block=982x2 Type=Byte, ColorInterp=Red
Band 2 Block=982x2 Type=Byte, ColorInterp=Green
Band 3 Block=982x2 Type=Byte, ColorInterp=Blue

---
Driver: GTiff/GeoTIFF
Files: E:\Images\transp_image.tif
Size is 982, 1108
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (-58.44952010001,-12.395666200632341)
Pixel Size = (0.020015227575895,-0.020015227575895)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  ( -58.4495201, -12.3956662) ( 58d26'58.27"W, 12d23'44.40"S)
Lower Left  ( -58.4495201, -34.5725384) ( 58d26'58.27"W, 34d34'21.14"S)
Upper Right ( -38.7945666, -12.3956662) ( 38d47'40.44"W, 12d23'44.40"S)
Lower Right ( -38.7945666, -34.5725384) ( 38d47'40.44"W, 34d34'21.14"S)
Center  ( -48.6220434, -23.4841023) ( 48d37'19.36"W, 23d29' 2.77"S)
Band 1 Block=982x2 Type=Byte, ColorInterp=Red
  NoData Value=0
Band 2 Block=982x2 Type=Byte, ColorInterp=Green
  NoData Value=0
Band 3 Block=982x2 Type=Byte, ColorInterp=Blue
  NoData Value=0
Band 4 Block=982x2 Type=Byte, ColorInterp=Alpha
  NoData Value=0





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Re: [gdal-dev] Use of gdalwarp to make GeoTiff transparent is flipping the image

2016-03-09 Thread Jukka Rahkonen 
Liglio  pobox.com> writes:

> 
> Hi,
> 
> I used the command "gdalwarp -dstalpha -srcnodata 255 -dstnodata 0 image.tif
> transp_image.tif" to make a color GeoTiff Image became transparent, but it
> is flipping the image horizontally. What I am doing wrong? Can I unflipp the
> image?
> 
> Thanks.
> 
>  
>  

Could you add the gdalinfo report of the original and warped image?

-Jukka Rahkonen-

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[gdal-dev] Use of gdalwarp to make GeoTiff transparent is flipping the image

2016-03-09 Thread Liglio 
Hi,

I used the command "gdalwarp -dstalpha -srcnodata 255 -dstnodata 0 image.tif
transp_image.tif" to make a color GeoTiff Image became transparent, but it
is flipping the image horizontally. What I am doing wrong? Can I unflipp the
image?

Thanks.

 
 



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Re: [gdal-dev] Google Summer of Code

2016-03-09 Thread Tanuj Kumar 
Yes, I have looked at the ideas list, and I am currently reading up on idea
no. 16, which is, implementing support for the proposed standard for
incrementally parseable GeoJSON data.

Also, I was thinking that maybe I could work on ticket no 6294,
https://trac.osgeo.org/gdal/ticket/6294
after I've studied about the GSoC idea, which is not really a bug, but an
enhancement. But if there are any other tickets that you or anyone else
would like to recommend me to work on, I'd love to see them too!

Now, about the GSoC idea, do I need to know JSON( or GeoJSON, for that
matter) to work on it? I only ask because the idea lists C/C++ as the
required skills, but I feel that maybe this work would involve knowing JSON
too...

Thanks and regards,

Tanuj


On Wed, Mar 9, 2016 at 2:58 PM, Dmitry Baryshnikov 
wrote:

> Hi, Tanuj
>
> I'll look for opened tickets for you, or maybe others can recommend some
> for you.
>
> By the way, do you see the idea list (
> https://trac.osgeo.org/gdal/wiki/SummerOfCode#a2016IdeasList)?
> The ideas are not ranked yet - the numbers in the list - are only in
> order.
> This is a task for us to rank the ideas.
> But, have you some preferable idea (or ideas) for GSoC from this list or
> maybe you have got own?
>
> Best regards,
> Dmitry
>
> 04.03.2016 16:11, Tanuj Kumar пишет:
>
> Hello,
> I am interested in applying for GSoC this year. Currently, I am reading up
> on the GDAL Summer of Code ideas list. I know C++ and C, and I have some
> experience on working on linux.
> Could the mentors please recommend a bug for me to work on, I'd really
> love to start off as soon as possible!
>
> Thank you,
>
> Tanuj Kumar
> Birla institute of Technology and Science
> Pilani, Rajasthan,
> India
>
>
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Re: [gdal-dev] Google Summer of Code

2016-03-09 Thread Dmitry Baryshnikov 

Hi, Tanuj

I'll look for opened tickets for you, or maybe others can recommend some 
for you.


By the way, do you see the idea list 
(https://trac.osgeo.org/gdal/wiki/SummerOfCode#a2016IdeasList)?

The ideas are not ranked yet - the numbers in the list - are only in order.
This is a task for us to rank the ideas.
But, have you some preferable idea (or ideas) for GSoC from this list or 
maybe you have got own?


Best regards,
Dmitry

04.03.2016 16:11, Tanuj Kumar пишет:

Hello,
I am interested in applying for GSoC this year. Currently, I am 
reading up on the GDAL Summer of Code ideas list. I know C++ and C, 
and I have some experience on working on linux.
Could the mentors please recommend a bug for me to work on, I'd really 
love to start off as soon as possible!


Thank you,

Tanuj Kumar
Birla institute of Technology and Science
Pilani, Rajasthan,
India


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