Re: [gdal-dev] gdal_merge nodata evaluation

2016-10-21 Thread Cechini, Matthew F. (GSFC-423.0)[Science Systems & Applications, Inc.]
Thanks Even. It also looks like gdal_merge always uses nearest neighbor interpolation, which is another reason we’ll have to use gdalwarp instead. Matt . Matthew Cechini Contractor, Science Systems and Applications, Inc. NASA GIBS Sy

Re: [gdal-dev] gdal_merge nodata evaluation

2016-10-20 Thread Even Rouault
On Thursday 20 October 2016 20:27:14 Cechini, GSFC-423.0, Inc.] wrote: > All, >We’ve recently begun usage of the gdal_merge utility in our processing > workflow and have hit a snag. I’m not sure if the snag is by design or is > user error. Here’s the scenario: >We have two 24_bit PNG im

[gdal-dev] gdal_merge nodata evaluation

2016-10-20 Thread Cechini, Matthew F. (GSFC-423.0)[Science Systems & Applications, Inc.]
All, We’ve recently begun usage of the gdal_merge utility in our processing workflow and have hit a snag. I’m not sure if the snag is by design or is user error. Here’s the scenario: We have two 24_bit PNG images, and existing image (E) and a new image (N) we are merging into E. They a