topic Re: How to remove the unwanted values created around the raster data to show the background in C++ ArcGIS Runtime API in Qt Maps SDK Questions

How to remove the unwanted values created around the raster data to show the background in C++ ArcGIS Runtime API

hoangtruonggis — Sun, 16 Oct 2022 08:49:04 GMT

I'm using Qt 5 C++ / Desktop_Qt_5_15_2_MSVC2019_64bit and ArcGIS SDK 100.13 to build my app.

When I add a raster to the map, I have a trouble creating a white (or black) background on a tiff image.

I want the white part to be transparent so the background can be seen.

Thank for help!

Re: How to remove the unwanted values created around the raster data to show the background in C++ ArcGIS Runtime API

ThomasHoman — Sun, 16 Oct 2022 13:06:01 GMT

Hello,

While I don't have specific SDK experience perhaps https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/mosaic.htm might help. Specifically the comment of "For file-based rasters, Ignore Background Value must be set to the same value as NoData for the background value to be ignored."

Regards,

Tom

Re: How to remove the unwanted values created around the raster data to show the background in C++ ArcGIS Runtime API

hoangtruonggis — Mon, 17 Oct 2022 02:19:26 GMT

Thank for your suggestion. But the main reason is I programmatically create the application independently with ArcGIS Pro. I haven't found any APIs that support it yet.

Re: How to remove the unwanted values created around the raster data to show the background in C++ ArcGIS Runtime API

MichaelBranscomb — Mon, 17 Oct 2022 17:31:46 GMT

The Raster Function capability may solve the problem - for more info see Solved: Re: RasterLayer Alpha Channel? - Esri Community