Subgrid EGM2008 geoid file

Knowledge Base GNSS & GPS
#1

Hey there everyone
I have south Galaxy G3 gnss receiver I’m having a problem with EMG2008 geoid file i downloaded one but it’s too big (0.9gb) and it causes the survstar app to be slow and sometimes even crushes i only need 4 zones in UTM coordinate system that covers Algeria (29 to 32) can anyone help me subgrid those 4 zones
the only software i found capable of doing that is Trimble TBC and is not for free
and thank on advance

#2

Dear Sirs. I am not sure but I think the Galaxy receiver accept the Geoid file in format GGF. Here I have one you can use it.Processing: EGM08.ggf…
EGM08.zip (1.8 MB)

#3

Uncompress the file and try with it

#4

I know the survstar app accepts geoid file in ggf or sgf extension the problem with the file i have is not the format its the size i downloaded from here

#5

I have sent you the Geoid file already in a second comments. Here I attach again.EGM08.zip (1.8 MB)

#6

The file you send me doesn’t work
one thing I forget to mention from all the geoid file i downloaded the only file that gave me a correct geoid height is the large file

#7

the file you send me is a 2.5’ EGM2008 subgrid. in South America (Peru / Bolivia / Chile / western Brazil region).