GeoJSON
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本頁說明如何以 GeoJSON 呈現地理資料
格式,使用 GMUGeoJSONParser
,在
搭配 GMUGeometryRenderer
。GeoJSON 是一種
格式,用來呈現點、線與多邊形等地理資料。
必要條件和注意事項
「GMUGeoJSONParser
」隸屬於
Maps SDK for iOS 公用程式庫。如果尚未設定
程式庫,請先按照設定指南操作,再閱讀本頁面的其餘內容。
如需完整程式碼範例,請參閱範例應用程式
已開啟
GitHub。
轉譯 GeoJSON 資料
如要在地圖上算繪 GeoJSON 資料,請建立 GMUGeoJSONParser
GeoJSON 資源的路徑 (其中 GeoJSON_sample.kml
範例)。然後建立 GMUGeometryRenderer
,將
GMUKMLParser
執行個體。最後,呼叫
GMUGeometryRenderer.render()
。以下程式碼範例顯示
在地圖上呈現 GeoJSON 資料:
Swift
import GoogleMapsUtils
class GeoJSON {
private var mapView: GMSMapView!
func renderGeoJSON() {
guard let path = Bundle.main.path(forResource: "GeoJSON_sample", ofType: "json") else {
return
}
let url = URL(fileURLWithPath: path)
let geoJsonParser = GMUGeoJSONParser(url: url)
geoJsonParser.parse()
let renderer = GMUGeometryRenderer(map: mapView, geometries: geoJsonParser.features)
renderer.render()
}
}
Objective-C
@import GoogleMapsUtils;
@implementation GeoJSON {
GMSMapView *_mapView;
}
- (void)renderGeoJSON {
NSString *path = [[NSBundle mainBundle] pathForResource:@"GeoJSON_sample" ofType:@"json"];
NSURL *url = [NSURL fileURLWithPath:path];
GMUGeoJSONParser *parser = [[GMUGeoJSONParser alloc] initWithURL:url];
[parser parse];
GMUGeometryRenderer *renderer = [[GMUGeometryRenderer alloc] initWithMap:_mapView
geometries:parser.features];
[renderer render];
}
@end
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上次更新時間:2025-07-26 (世界標準時間)。
[null,null,["上次更新時間:2025-07-26 (世界標準時間)。"],[[["\u003cp\u003eThis page demonstrates how to render geographic data in GeoJSON format on Google Maps using the \u003ccode\u003eGMUGeoJSONParser\u003c/code\u003e and \u003ccode\u003eGMUGeometryRenderer\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eGeoJSON is a commonly used format for displaying geographic data like points, lines, and polygons.\u003c/p\u003e\n"],["\u003cp\u003eYou'll need to set up the Maps SDK for iOS Utility Library before using \u003ccode\u003eGMUGeoJSONParser\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code examples show how to render GeoJSON data on a map in both Swift and Objective-C.\u003c/p\u003e\n"]]],["The document explains how to render GeoJSON data on a map using the `GMUGeoJSONParser` and `GMUGeometryRenderer` from the Maps SDK for iOS Utility Library. First, a `GMUGeoJSONParser` is created with the GeoJSON resource path. Then, a `GMUGeometryRenderer` is initialized with the map view and the parser's features. Finally, the `GMUGeometryRenderer.render()` method is called to display the GeoJSON data, such as points, lines, and polygons, on the map.\n"],null,["Select platform: [Android](/maps/documentation/android-sdk/utility/geojson \"View this page for the Android platform docs.\") [iOS](/maps/documentation/ios-sdk/utility/geojson \"View this page for the iOS platform docs.\") [JavaScript](/maps/documentation/javascript/datalayer \"View this page for the JavaScript platform docs.\")\n\nThis page shows you how to render geographic data in the GeoJSON\nformat, using `GMUGeoJSONParser`, in\nconjunction with `GMUGeometryRenderer`. GeoJSON is a popular\nformat for rendering geographic data such as points, lines, and polygons.\n\nPrerequisites and notes\n\n`GMUGeoJSONParser` is part of\nthe [Maps SDK for iOS Utility Library](https://github.com/googlemaps/google-maps-ios-\nutils). If you haven't yet set up\nthe library, follow the [setup guide](/maps/documentation/ios-\nsdk/utility/setup) before reading the rest of this page.\n\nFor the full code sample, see the sample apps\n[on\nGitHub](https://github.com/googlemaps/google-maps-ios-utils).\n\nRendering GeoJSON data\n\nTo render GeoJSON data on a map, create a `GMUGeoJSONParser` with\nthe path to a GeoJSON resource (`GeoJSON_sample.kml` in this\nexample). Then, create a `GMUGeometryRenderer`, passing the\n`GMUKMLParser` instance. Finally, call\n`GMUGeometryRenderer.render()`. The following code example shows\nrendering GeoJSON data on a map: \n\nSwift \n\n```swift\nimport GoogleMapsUtils\n\nclass GeoJSON {\n private var mapView: GMSMapView!\n\n func renderGeoJSON() {\n guard let path = Bundle.main.path(forResource: \"GeoJSON_sample\", ofType: \"json\") else {\n return\n }\n\n let url = URL(fileURLWithPath: path)\n\n let geoJsonParser = GMUGeoJSONParser(url: url)\n geoJsonParser.parse()\n\n let renderer = GMUGeometryRenderer(map: mapView, geometries: geoJsonParser.features)\n renderer.render()\n }\n}\n \n```\n\nObjective-C \n\n```objective-c\n@import GoogleMapsUtils;\n\n@implementation GeoJSON {\n GMSMapView *_mapView;\n}\n\n- (void)renderGeoJSON {\n NSString *path = [[NSBundle mainBundle] pathForResource:@\"GeoJSON_sample\" ofType:@\"json\"];\n NSURL *url = [NSURL fileURLWithPath:path];\n GMUGeoJSONParser *parser = [[GMUGeoJSONParser alloc] initWithURL:url];\n [parser parse];\n GMUGeometryRenderer *renderer = [[GMUGeometryRenderer alloc] initWithMap:_mapView\n geometries:parser.features];\n [renderer render];\n}\n\n@end\n \n```"]]