Re: [gdal-dev] Building Overviews for Tiles of Large images

2011-06-25 Thread Chaitanya kumar CH
Derek, Sorry I missed your mail. You can very well use RasterIO to get a downsampled image. But the disk I/O is still going to be the same. That is the main bottleneck. Also, you are stuck with the nearest neighbor method, which can become very choppy at higher levels. On Wed, Jun 15, 2011 at 11

[gdal-dev] zmap format

2011-06-25 Thread Nikolaos Hatzopoulos
Hi, There is a format called zmap format and it has Zmap Plus grid does anybody know more info about this format? mostly it is used for DEM and petroleum and according to my opinion it is descried by a rectangular kind of cells but it might not, that's why I am asking for some reference for zmap f

Re: [gdal-dev] WCS driver, GetSubdatasets (Python) returns empty list

2011-06-25 Thread Jachym Cepicky
Evan, thanks for answer it works!! Thanks Jachym 2011/6/26 Even Rouault : > Le dimanche 26 juin 2011 00:03:55, Jachym Cepicky a écrit : >> Hi, >> >> using Python, gdal 1.8.0, Ubuntu >> >> I need to access some Temporal information about available WCS layer > > Jachym, > > Frank has added supp

Re: [gdal-dev] WCS driver, GetSubdatasets (Python) returns empty list

2011-06-25 Thread Even Rouault
Le dimanche 26 juin 2011 00:03:55, Jachym Cepicky a écrit : > Hi, > > using Python, gdal 1.8.0, Ubuntu > > I need to access some Temporal information about available WCS layer Jachym, Frank has added support for WCS temporal information in GDAL trunk just a few days ago. So it is not available

[gdal-dev] WCS driver, GetSubdatasets (Python) returns empty list

2011-06-25 Thread Jachym Cepicky
Hi, using Python, gdal 1.8.0, Ubuntu I need to access some Temporal information about available WCS layer http://www.gdal.org/frmt_wcs.html says at the end, that "Each time position available for the coverage will be treated as a subdataset." I have following service description file (with ser

Re: [gdal-dev] JAXAPalsar 1.0 & 1.1 extended metadata reading support

2011-06-25 Thread Antonio Valentino
Hi, Il 25/06/2011 12:48, Antonio Valentino ha scritto: > Hi Rodolfo, > can you please confirm that the data type of PALSAR Level 1.5 products > should be GDT_UInt16 and not GDT_Int16 as in current implementation? > > If so I will file a ticket with a patch for fixing the issue. > > > thanks >

Re: [gdal-dev] JAXAPalsar 1.0 & 1.1 extended metadata reading support

2011-06-25 Thread Antonio Valentino
Hi Rodolfo, can you please confirm that the data type of PALSAR Level 1.5 products should be GDT_UInt16 and not GDT_Int16 as in current implementation? If so I will file a ticket with a patch for fixing the issue. thanks Il 17/06/2011 21:28, Rodolfo Bonnin ha scritto: > Hello all, > > I'm ju