Re: [gdal-dev] Vertical datum conversion for SRTM data

2019-01-19 Thread Greg Troxel
Nikos Alexandris writes: > * Nikos Alexandris [2017-11-21 10:25:42 +0100]: > >>Dear list, can GDAL handle the following exercise? >> >>Of interest is the Mean Sea Level, based on NASA’s SRTM. I am new in this >>topic. Is the following equation correct? >> >>SRTM(MSL) = SRTM(WGS84) - MSL(WGS84) [

Re: [gdal-dev] Vertical datum conversion for SRTM data

2019-01-19 Thread Nikos Alexandris
* Nikos Alexandris [2017-11-21 10:25:42 +0100]: Dear list, can GDAL handle the following exercise? Of interest is the Mean Sea Level, based on NASA’s SRTM. I am new in this topic. Is the following equation correct? SRTM(MSL) = SRTM(WGS84) - MSL(WGS84) [*] Here https://gitlab.com/NikosAlexan

Re: [gdal-dev] Vertical datum conversion for SRTM data

2017-11-22 Thread Andre Joost
Am 21.11.2017 um 12:27 schrieb Michael Smith: Egm96 grid shift file available from http://download.osgeo.org/proj/vdatum/egm96_15/egm96_15.gtx Note that OSGEO4W64 still ships an incorrect version of the file from 2010. According to http://download.osgeo.org/proj/vdatum/egm96_15/ the file s

Re: [gdal-dev] Vertical datum conversion for SRTM data

2017-11-21 Thread Michael Smith
: [gdal-dev] Vertical datum conversion for SRTM data On mardi 21 novembre 2017 10:25:42 CET Nikos Alexandris wrote: > Dear list, can GDAL handle the following exercise? > > Of interest is the Mean Sea Level, based on NASA’s SRTM. I am new in this > topic. Is the following equa

Re: [gdal-dev] Vertical datum conversion for SRTM data

2017-11-21 Thread Even Rouault
On mardi 21 novembre 2017 10:25:42 CET Nikos Alexandris wrote: > Dear list, can GDAL handle the following exercise? > > Of interest is the Mean Sea Level, based on NASA’s SRTM. I am new in this > topic. Is the following equation correct? > > SRTM(MSL) = SRTM(WGS84) - MSL(WGS84) [*] > > > Is it

[gdal-dev] Vertical datum conversion for SRTM data

2017-11-21 Thread Nikos Alexandris
Dear list, can GDAL handle the following exercise? Of interest is the Mean Sea Level, based on NASA’s SRTM. I am new in this topic. Is the following equation correct? SRTM(MSL) = SRTM(WGS84) - MSL(WGS84) [*] Is it “correct” to recommend the https://hydrosheds.cr.usgs.gov/ data set for Mean Sea