Determine a provided lat long is in the region by list of lat long in Objective C

Question

I have a list (NSMutableArray) of latlong surrounding the Dhaka City region. Now want want to determine a provided lat long is in the Dhaka City Region.

My code is provided below:

+(NSMutableArray*)getAvailableAddress {
    NSMutableArray* dhakaAvailableAreas=[[NSMutableArray alloc]init];
    NSDictionary *latLongDict = @{@"lat" : @(23.665217), @"long":@(90.456556)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.710108), @"long":@(90.400022)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.707796), @"long":@(90.366647)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.744056), @"long":@(90.345334)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.751866), @"long":@(90.333149)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.768038), @"long":@(23.768038)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.774732), @"long":@(90.336199)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.796483), @"long":@(90.338031)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.833850), @"long":@(90.339256)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.853928), @"long":@(90.342309)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.867869), @"long":@(90.351460)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.887389), @"long":@(90.358176)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.899096), @"long":@(90.380142)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.882914), @"long":@(90.394773)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.886806), @"long":@(90.417956)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.899729), @"long":@(90.440122)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.895324), @"long":@(90.456267)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.861075), @"long":@(90.475134)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.840659), @"long":@(90.473056)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.828086), @"long":@(90.486782)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.793225), @"long":@(90.480572)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.782239), @"long":@(90.470264)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.770608), @"long":@(90.482614)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.753955), @"long":@(90.488093)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.747045), @"long":@(90.486714)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.742954), @"long":@(90.494262)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.732360), @"long":@(90.493535)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.717059), @"long":@(90.500136)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.710997), @"long":@(90.508137)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.710997), @"long":@(90.508137)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.693175), @"long":@(90.480623)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.672433), @"long":@(90.468799)};
    [dhakaAvailableAreas addObject:latLongDict];
    latLongDict = @{@"lat" : @(23.667661), @"long":@(90.458352)};
    [dhakaAvailableAreas addObject:latLongDict];

    return dhakaAvailableAreas; 

}

Now if I provide a lat long for example lat=23.665219 and long=90400023 How can I determine the lat long is in the Dhaka City Region

Thanks in advance.

Answer 1

Finally I get a sollution using GMSGeometryContainsLocation, and it works more accurately and fine.

if (GMSGeometryContainsLocation(locationPoint, polygonPath, YES)) {
    NSLog(@"locationPoint is in polygonPath.");
} else {
    NSLog(@"locationPoint is NOT in polygonPath.");
}