hi
how to find the limits of the polygon opacity 255

Hi Alain,
I'm not sure I understand the question.
One thing to note is that the "group level" opacity is set at 255 in your example, but each of your custom polygons has an explicit opacity set of 50, which will override the group level value. You can use the "clear values" option on one or more polygons by selecting them and using the right-click menu. I'm not sure if that has any bearing on your question though?

Matt

it's ok , I modified with QGIS

Hi
opacity polygons is not functional 2D

HI Alain,
How are you exporting the polygon?

Possible causes:

1. You are using an Elite range unit, which does not support partial transparency.
2. You do not have a raster layer underneath your vector layer. Transparency on HDS units is only supported with an underlying raster layer.
3. You have exported directly from RM, which has produced a "dummy" underlying raster layer (to get around point 2.). This is in Lowrance "land" colour.
4. You have not included the at5.xml file on your memory card, or you are using the wrong at5.xml file.

I am not certain what your final image should look like, but if you want it to look like the map in the first image, then you need to do the following:

1. Export the SS to an AT5 raster layer.
2. Export the user map as a vector layer.
3. Place the raster layer from step 1 into the ShadedRelief folder on your memory card, and the at5.xml and large.at5 files from step 2 at the root of the card. Note the at5.xml file is important, and it must the the file that was produced during step 2.

Matt

2. You do not have a raster layer underneath your vector layer. Transparency on HDS units is only supported with an underlying raster layer.

it's ok with Shaded Relief

thank you