Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-29 Thread Even Rouault
er/smoother interpolation logic > Piyush > > From: Even Rouault > Date: Thursday, September 28, 2017 at 3:36 PM > To: "Agram, Piyush S (334D)" > Cc: "gdal-dev@lists.osgeo.org" > Subject: Re: [gdal-dev] Geolocation arrays - location interpretation >

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Agram, Piyush S (334D)
ideal simulated datasets that I’m using. Piyush From: Even Rouault Date: Thursday, September 28, 2017 at 3:36 PM To: "Agram, Piyush S (334D)" Cc: "gdal-dev@lists.osgeo.org" Subject: Re: [gdal-dev] Geolocation arrays - location interpretation On jeudi 28 septembre 2017

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Even Rouault
On jeudi 28 septembre 2017 22:18:31 CEST Agram, Piyush S (334D) wrote: > Hi Even, > I implemented the bilinear weighting like we discussed and that took out > the systematic pixel shift from 1 to 0.5 (sign depending on orientation). > You can see the changes here: > https://github.com/piyushrpt

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Agram, Piyush S (334D)
. I’m going to try implementing some round trip checks to see if that shows something? Piyush From: Even Rouault Date: Thursday, September 28, 2017 at 12:25 PM To: "Agram, Piyush S (334D)" Cc: "gdal-dev@lists.osgeo.org" Subject: Re: [gdal-dev] Geolocation arrays - location

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Even Rouault
On jeudi 28 septembre 2017 17:26:52 CEST Agram, Piyush S (334D) wrote: > Hi Even, > I think I have figured out how the GeoLocTransformer works. Dumped out > the backmap and might have some changes. > > 1) Rounding up to the nearest integer is definitely the issue here. > > 2) I

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Agram, Piyush S (334D)
adding a weighting scheme. I don’t want to increase the runtime too much by adding complexity. Piyush From: Even Rouault Date: Thursday, September 28, 2017 at 2:56 AM To: "gdal-dev@lists.osgeo.org" Cc: "Agram, Piyush S (334D)" Subject: Re: [gdal-dev] Geolocation arrays - loc

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Even Rouault
On jeudi 28 septembre 2017 02:14:53 CEST Agram, Piyush S (334D) wrote: > Hi, > I’m trying to track down systematic pixel shift effects observed with > warping data using geolocation arrays: > https://trac.osgeo.org/gdal/ticket/6959 > > Essentially, the same data (image and location) provided

Re: [gdal-dev] Geolocation arrays - location interpretation

2017-09-28 Thread Even Rouault
On jeudi 28 septembre 2017 02:14:53 CEST Agram, Piyush S (334D) wrote: > Hi, > I’m trying to track down systematic pixel shift effects observed with > warping data using geolocation arrays: > https://trac.osgeo.org/gdal/ticket/6959 > > Essentially, the same data (image and location) provided

[gdal-dev] Geolocation arrays - location interpretation

2017-09-27 Thread Agram, Piyush S (334D)
Hi, I’m trying to track down systematic pixel shift effects observed with warping data using geolocation arrays: https://trac.osgeo.org/gdal/ticket/6959 Essentially, the same data (image and location) provided as geolocation arrays is warped to a different output depending on how the arrays