Re: [gdal-dev] Applying colour/contrast corrections to geotiffs

2013-03-11 Thread Paul Norman
> From: Even Rouault [mailto:even.roua...@mines-paris.org] > Sent: Monday, March 11, 2013 1:55 PM > Subject: Re: [gdal-dev] Applying colour/contrast corrections to geotiffs > > > If you run nearblack to go from one JPEG in TIFF to another JPEG in > > TIFF, does it use this optimization for the RGB

Re: [gdal-dev] Applying colour/contrast corrections to geotiffs

2013-03-11 Thread Even Rouault
> Is there a way to verify if it is using this optimization? $ gdal_translate byte.jpg byte.tif -co compress=jpeg --debug GTiff -q GTiff: Using special copy mode from a JPEG dataset GTiff: Setting JPEGCOLORMODE_RGB > I'm not actually > feeding it a JPEG in the command line at any point, but the W

Re: [gdal-dev] Applying colour/contrast corrections to geotiffs

2013-03-11 Thread Paul Norman
> From: Even Rouault [mailto:even.roua...@mines-paris.org] > Sent: Monday, March 11, 2013 12:13 PM > Subject: Re: [gdal-dev] Applying colour/contrast corrections to geotiffs > > Le lundi 11 mars 2013 18:55:55, Paul Norman a écrit : > > I doubt that any correction/transformation can recover the lo

Re: [gdal-dev] Gdal Asynchronous IO

2013-03-11 Thread Even Rouault
Le lundi 11 mars 2013 21:21:50, Allen Kempe a écrit : > In Rfc 24: GDAL Progressive Data Support it says that the metadata for a > driver will specify metadata item "DCAP_ASYNCIO" as yes if the driver > supports asynchronous IO. So, code like this should retrieve this option: > const char* s_asynci

[gdal-dev] Gdal Asynchronous IO

2013-03-11 Thread Allen Kempe
In Rfc 24: GDAL Progressive Data Support it says that the metadata for a driver will specify metadata item "DCAP_ASYNCIO" as yes if the driver supports asynchronous IO. So, code like this should retrieve this option: const char* s_asyncio = drv->GetMetadataItem("DCAP_ASYNCIO"); However, I have b

[gdal-dev] A few questions for a new user.

2013-03-11 Thread Nick
Hello all, I am using the Java bindings on a Windows 7 machine. I am trying to do my first conversion of a file based on the API Tutorial and the sample java files. 1) How does gdal.Open() convert the ingested data into a Dataset object? I've looked at the Javadocs and API listed, but I cannot

Re: [gdal-dev] Applying colour/contrast corrections to geotiffs

2013-03-11 Thread Even Rouault
Le lundi 11 mars 2013 18:55:55, Paul Norman a écrit : > I am generating a geotiff from a WMS source. I can do so from either PNG > requests or JPEG requests. The PNG requests have better contrast but are > 4x-5x as slow. > > I would like to compare the PNG and JPEG request results for a > represen

[gdal-dev] Applying colour/contrast corrections to geotiffs

2013-03-11 Thread Paul Norman
I am generating a geotiff from a WMS source. I can do so from either PNG requests or JPEG requests. The PNG requests have better contrast but are 4x-5x as slow. I would like to compare the PNG and JPEG request results for a representative area and develop a contrast correction which I can apply to

Re: [gdal-dev] translate polygon shape file

2013-03-11 Thread Jukka Rahkonen
Murat Beyhan gmail.com> writes: > > Hi friends,I have a polygon shape file which is including district of the cityIt is latitude longitude data. And I try to transform it into UTM data Is it possible to do using gdal. Read http://www.gdal.org/ogr2ogr.html and you will make it. -Jukka Rahkonen-

[gdal-dev] translate polygon shape file

2013-03-11 Thread Murat Beyhan
Hi friends, I have a polygon shape file which is including district of the city It is latitude longitude data. And I try to transform it into UTM data Is it possible to do using gdal. I have googled it some but I could not find appropriate way to do. The example of the data as follows. Thanks for