Re: [gdal-dev] strange grid pattern when reprojecting

2015-11-30 Thread Rahkonen Jukka (MML)
Hi, Sorry for being unclear, I meant a sample of source data that could be used for reproducing the issue, not a sample of output with a grid artifact. -Jukka Rahkonen- > Hi, > I've tried adding -et 0 and the grid feature is still there. Here is an > example: https://www.dropbox.com/s/teywuev

Re: [gdal-dev] strange grid pattern when reprojecting

2015-11-27 Thread Ramiro Marco Figuera
Hi, I've tried adding -et 0 and the grid feature is still there. Here is an example: https://www.dropbox.com/s/teywuev72pikcu6/grid.png?dl=0. Cheers, Ramiro On 11/27/2015 12:25 PM, Rahkonen Jukka (MML) wrote: Hi, Gdalwarp is the tool to use and usually it works well but your case is no

Re: [gdal-dev] strange grid pattern when reprojecting

2015-11-27 Thread Rahkonen Jukka (MML)
Hi, Gdalwarp is the tool to use and usually it works well but your case is not the most common one "lunar south polar DEMs in stereographic projection to gnomonic projection." Best if you could put a sample image available somewhere but perhaps but there are some documents about advanced trick

Re: [gdal-dev] strange grid pattern when reprojecting

2015-11-27 Thread Ramiro Marco Figuera
Hi, I've tried all the resampling methods and all of them produce a gridded pattern. Is there any other way of reprojecting the data using gdal? Cheers, Ramiro On 11/25/2015 04:32 PM, Even Rouault wrote: Le mercredi 25 novembre 2015 16:16:17, Ramiro Marco Figuera a écrit : Hi all, I notic

Re: [gdal-dev] strange grid pattern when reprojecting

2015-11-25 Thread Even Rouault
Le mercredi 25 novembre 2015 16:16:17, Ramiro Marco Figuera a écrit : > Hi all, > > I noticed a curious gridded pattern when using gdalwarp to reproject. I > am reprojecting some lunar south polar DEMs in stereographic projection > to gnomonic projection. I am using the following command: gdalwarp

[gdal-dev] strange grid pattern when reprojecting

2015-11-25 Thread Ramiro Marco Figuera
Hi all, I noticed a curious gridded pattern when using gdalwarp to reproject. I am reprojecting some lunar south polar DEMs in stereographic projection to gnomonic projection. I am using the following command: gdalwarp -t_srs '+proj=gnom +lat_0=-90 +lon_0=0 +x_0=0 +y_0=0 +a=1737400 +b=1737400