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Hi Community,

Could anyone tell me how to plot bathymetry (*.txt file) data? Can I use Blue Kenue?

Thank you so much in advance!

I am assuming your text file is in X, y, Z format
and if so change your filename from *.txt to *.xyz and open in Blue Kenue

regards
Tony

Thanks Tony! Your suggestion works with text files which present XY location and its depth (in my attachment here I marked it as text file type 1)

Actually I have several huge text files (e.g ~2GB. These files do not show X-Y cordinates vs depths (text file type 2). So, I guest I have to convert them (Please kindly see attachment)

Do you have any suggestions? How can I make this text-file type work in Blue Kenue? Thank you so much!

Hi,

where is your bathymetry data in this file - type 2?
From your screenshot ist looks like there are just missing values and x or y-koordinates in your file...

Best regards,
Gabi

Hi
your second file is in a grid format lidar/topographical file which looks like it is in a standard format that GIS type packages might be able to read directly and generate an xyz file as an export option

I have used this type of file often and have quickly written a simple fortran code that reads the ncols as x number of points and nrows as the y number of points (it may be the other way round but you will know that when you plot it)the xllcorner as the x origin, yllcorner as the y origin and the cellsize = 0.5 as the spacing and then in a do loop read the data (i cant tell from your file sample whether the data is assembled in x values for each y row or the other way around but you would soon find that out with your code.
rds Tony

Thank you a lot! I think you are right! Could you tell me which program I can use to open that file?

Best Regards

HUY

I got several bathymetry files. As shown in the screen:

As I marked as Type 1, there is no problem with this file, I can open it with Blue Kenue.

But type 2: obviously XY cordinates are missing. So I guest I have to interpolate, and using different program to deal with this file. As you can see this file has XLLCORNER: 294205.5, and YLLCORNER: 5756671; CELLSIZE: 0.5

so it probably can interpolate, and from that I can make a new bathymetry. But I don't know how to do with that.

Can you help me with that?

Thanks a lot

HUY

HUY
I think your grid file is in ArcInfo grid ascii format so try change your file to .asc and try the import option in Bluekenue for ARcinfo grid
tony

Thank you so much Tony! It works now