Android Question [SOLVED] Is it inside a polygon?

[yfleury]

Hi all
I use googlemapsextra to trace a simple polygon. I have lat/lnt inside. Then I try the code from this page

Geo-Zone Determination (Point in Polygon)

I use this in my app to determine if a vehicle is within a defined zone made of 5 or more lat/lon coordinates. Point 1 is also Point 5 (first point and last point are same value). A simple box shows how to create this: 1----------2 | ........... | | ........... | clockwise (or counter...

www.b4x.com

But the FindInZone sub say always false. I know my lat/lnt is inside near center of polygon. Each point of polygon is near or more than 250m
A small project that simply make calculation only whit some coordinates.

 

[TILogistic]

Hi all I use googlemapsextra to trace a simple polygon. I have lat/lnt inside. Then I try the code from this page

Geo-Zone Determination (Point in Polygon)

I use this in my app to determine if a vehicle is within a defined zone made of 5 or more lat/lon coordinates. Point 1 is also Point 5 (first point and last point are same value). A simple box shows how to create this: 1----------2 | ........... | | ........... | clockwise (or counter...

www.b4x.com

But the FindInZone sub say always false. I know my lat/lnt is inside near center of polygon. Each point of polygon is near or more than 250m A small project that simply make calculation only whit some coordinates.

Test:

[B4X] GPSPolyMap - check if GPS location is inside a polygon

With this class, you can check if the GPS location coordinate is inside a polygon. You can use this class to check whether the user is inside a building, shopping mall or any custom shape. This class is only for B4A and B4I. Here is how can you get the coordinates of an establishment (school...

www.b4x.com

and

Polygon calculation

Hi, im using googlemapextras and have a series of polygons which define property boundaries. I need to be able to calculate if a given lat/lng is within a specified distance of the edge of any part of the polygon.. I have seen code posted which shows if a given lat/lng is within a polygon or...

www.b4x.com

 

[yfleury]

Thank @oparra
I read all your link and a little light turn on in my head.
All coordinate for a polygon is provided by googlemapsextra. Then in FindInZone sub, I add the first coordinate to the lists polx and poly. This close polygon.
And now it's working well and fast.