topic Re: Point In Polygon Search in Qt Maps SDK Questions

Point In Polygon Search

MauricioRamirez1 — Wed, 20 Feb 2019 23:40:39 GMT

We have a system that brings in the Lat/Lon of field units. They are made available to my application by our message bus. I'm wanting to find out if an incoming unit is within any of our "Areas Of Interest". My thought was to load the "Area Of Interest" layer from teh GIS server into memory and as the unit locations come in, check them all in memory. The application would not have a display, and would run in the background and if a unit falls inside of the area of interest, it would send a message via our message bus. Questions:

Can I have a Qt application utilizing the Qt Runtime with no display
Can I pull a layer from the ArcGIS server on startup and load it into memory for query

Re: Point In Polygon Search

Rasmus_BloustrødLind — Thu, 21 Feb 2019 10:14:39 GMT

Hey Mauricio

To load a featurelayer in a QT app in gml code use:

            FeatureLayer{

                id: featureLayer

                ServiceFeatureTable{

                    url: featureServiceURL

this has to be loaded inside a mapview though. But if you do not add a Map {} part to the code there will not be displayed a map

after this the featurelayer should be able to be call on the id

hope this can help

best

rasmus bloustrød lind

Re: Point In Polygon Search

MauricioRamirez1 — Thu, 21 Feb 2019 17:36:28 GMT

Rasmus,

Thanks for the quick reply. I will definitely give that a try.