amap | Gaode map-Qt map plug-in | Map library

When attempting to get yuv video data from Matrice 600, it works correctly about 5% of the time. But most of the time, I never receive onYUVDataCallback. When I check the decoder status with DJICodecManager.isDecoderOK(), I receive false. For the rare occasions that it does work, isDecoderOK() returns true.

I'm using dependencies as below

I am new to all of this, I am using spring boot to make a simple book list web MVC app, I amapped the books to objects from an xml file and now I am trying to display them but I am not able to, here is my controller function:

Given a small dataset df as follows:

I am exploring the use of std::atomic in a struct across translation units and have run into a constructor compile problem. When I try to use explicit instantiation, the compiler says they don't match. How do I match up the explicit instantiation and the A constructor?

Im using GeoJSON with leaflet to insert markers onto a map, I then have a Ajax request periodically update the icons every 60 seconds with their latest state (they go red or green if the location is up or down)

However it's been noted that the page looked like it had a memory leak, on further investigations we can see that additional markers are added on each refresh, so with 100 markers on the map after an hour we have 6000 markers. Can anyone help me on making the existing markers update based on the new data or remove and re add them?

current code below

Thanks

I am working with a code base that has relied on Eclipse for compilation until now. My objective is to compile it with javac (via ant) to simplify the build process. The project compiles without complaint in Eclipse (version 2019-12 (4.14.0)), but javac (OpenJDK, both versions 1.8.0_275 and 14.0.2) produces method ... cannot be applied to given types errors involving upper bounded wildcards.

Note that the repository is 64 MB at time of writing:

I have the following keybindings:

I have an Hashmap

edit: This question has now been correctly answered here: https://gis.stackexchange.com/a/378085/171458

I have a shapefile consisting of 262 rows of MULTILINESTRINGs. Combined this shapefile (the political boundary of the arctic region) wraps the world and I would like to check for a large set of coordinates if they fall within this shapefile. I know how to do that, but that does require having a closed polygon, instead of a combination of lines. Some of my solutions have come pretty far, but none actually work.

I have looked at this: https://gis.stackexchange.com/questions/290170/convert-a-linestring-into-a-closed-polygon-when-the-points-are-not-in-order and this page: https://gis.stackexchange.com/questions/332427/converting-points-to-polygons-by-group

The shapefile can be downloaded here: https://www.amap.no/work-area/document/868

I have also posted it here: https://gis.stackexchange.com/questions/378010/combining-a-feature-collection-of-multilinestrings-into-one-closed-polygon-in-r, but I am also asking it here because I only have R available for this task.