Re: [gdal-dev] Geoid read performance

2020-10-30 Thread INT
> -Original Message- > From: Even Rouault > Sent: October 30, 2020 12:03 > To: gdal-dev@lists.osgeo.org > Cc: Vautour, André (INT) > Subject: Re: [gdal-dev] Geoid read performance > > ---External Email--- > > On mardi 27 octobre 2020 17:17:28 CET Vaut

Re: [gdal-dev] Geoid read performance

2020-10-30 Thread Even Rouault
On mardi 27 octobre 2020 17:17:28 CET Vautour, André (INT) wrote: > Hi all, > > I am using GDAL to read some geoid files in order to do some vertical datum > transformations. The transformation engine I am using is done point by > point transformations and doing a grid lookup for each point, so th

[gdal-dev] Geoid read performance

2020-10-27 Thread INT
Hi all, I am using GDAL to read some geoid files in order to do some vertical datum transformations. The transformation engine I am using is done point by point transformations and doing a grid lookup for each point, so this means when transforming say a million points, it is doing a two millio