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I use this code to check whether a point is inside a polyon: Type ePoint(X As Double, Y As Double) Public Sub IsPointInPolygon(polygon() As ePoint, X As Double, Y As Double) As Boolean Dim result As Boolean = False Dim j As Int = polygon.length - 1 For i = 0 To polygon.length - 1
link: Hello I want to parse a KML file with polygons (XML2MAP ?) and save it (in a SQL file, or is there a more suitable way?) Then the user should be abl
link: Yes, it is possible. Yes, you should use Xml2Map.
link: Hi, José, thank you, but unfortunately not. "Geofence regions are defined as a circle with a center point and radius" My areas are polygons, like thi

B4A/B4I Usage: Private PolyPoints As List PolyPoints.initialize PolyPoints.Add(CreateMap("lat":22.573515, "lng":88.371020)) PolyPoints.Add(CreateMap("lat":22.569855, "lng":88.370321)) PolyPoints.Add(CreateMap("lat":22.568923, "lng":88.375217)) PolyPoints.Add(CreateMap("lat":22.570707, "lng":88.37315
link: This is based on google.maps.geometry.poly.containsLocation. To check if the point is on the edge of a polyline you have to use google.maps.geometry.p
link: How to check if the GPS is on a plotted route? I ask this before posting the query on the forum.

https://www.b4x.-formulas.78449/#post-498431 Found it with: https://www.b4x./?query=inside+polyon
link: Hello, Im looking for a function to make some geometrical checkings like : - to find if a screen point (top and left coordonates) is inside a polyg

Test: https://www.b4x.com/android/forum/threads/b4x-gpspolymap-check-if-gps-location-is-inside-a-polygon.117625/#post-735898 and https://www.b4x.-calculation.64819/#post-410936
link: 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 FindInZ
link: Hi all I use googlemapsextra to trace a simple polygon. I have lat/lnt inside. Then I try the code from this page https://www.b4x.com/android/forum/th

Based on this source http://rosettacode.org/wiki/Ray-casting_algorithm I've adatped the code to B4i (should be identical for B4J and B4A too) and I want to share it in this so helpful forum. You need to call the sub with a Point(LatLng) and a list(LatLng) that contains the sequence of vertex of the
link: Confirm. Work without problem in B4A. Great work @marcick +50 ;);)
link: Thanks very interesting !

https://www.b4x.com/android/forum/threads/b4x-gpspolymap-check-if-gps-location-is-inside-a-polygon.117625/post-735852

Is a point inside a polygon: Converted from a C routine taken from here: http://www.codeproject.com/Tips/84226/Is-a-Point-inside-a-Polygon There is an explanation of it's workings and it's license in the link. Private Sub pnpoly(nvert As Int, vertx() As Int, verty() As Int, testx As Int, testy As
link: hi, Private Sub pnpoly(nvert As Int, vertx() As Int, verty() As Int, testx As Int, testy As Int) i understand that vertx() and verty() are the poly

Helper method AddPoint: public Sub AddPoint(markers As List, lat As Double, lon As Double, fencePolygonID As String) MarkerCounter = MarkerCounter + 1 Dim ll As LatLon ll.Initialize ll.lat = lat ll.lon = lon ll.PolygonID = fencePolygonID MarkersMap.Put("polygonmarker" &

The algoritm for finding out if a point is within a polygon is pretty straightforward: Pick a point that you know is outside the polygon (such as the smallest X and smallest Y, both -1). Then, simply see how many polygon border lines a line between that point and the point you want to test intersec

Attached you find a small project which returns if a point is inside the polygon, in the surrounding with a given distance or outsides the surrounding. It is an evolution of this project. The routine checks first if the point is in the polygon and then check if the distance of the point to the each
link: 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 with

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