Trouble getting raster bathymetry showing on Lowrance Elite Ti

[thomasjames]

Hi everyone, this is my first time posting so apologies if I didnt do it right.

I'm trying to convert raster bathymetry in to AT5 files for my Lowrance Elite Ti chartplotter but all I get is a blank white background when I display it on my unit.

I'm doing the following while using IMC:
- Converting ESRI GRID to BMP image file with world file as WGS84.
- Input file is a BMP image file with world file as WGS84.
- Used ATLAS 10, 12 and 13.
- Setting as Shaded Relief.
- Resolution min and max as 32 as pixel size is 30m.
- Transferring to an 8GB microSD card with navionics already loaded on it.
- Selecting the lowrance input file on chartplotter.

I've tried zooming in and out and my files don't show, all I get is a white background.

Thanks in advance.

[fjordfischer]

Without a pic or the datas it's hard to say, what is the reason.

- Do you have try to process a raster from min 1...4 to 32 Resolution to better find the chart if you zoom in/out?
- What a WGS84 you've used. Correct is a WGS wth EPSG code 4326?
- If you have a grid, why you don't produce vector datas from it (what a GIS you use)?

[thomasjames]

Thanks for the reply fjordfischer. I originally tried 1 to 32 based on forum posts but that didnt work either. I'm using EPSG code 4326, so shouldnt be that. I use QGIS. I wasnt aware I could convert the GRID in to a vector data, what data type would you specifically use and is there a particular process would I use? I'll post some of my data I'm trying to convert for you to look at.