Question

我想加载上传到服务器上的GeoJson文件

var promise = ('https://api.myjson.com/bins/31e3j');
that.map.data.loadGeoJson(promise);

此条件正常

但我想在本地加载这个GeoJson文件所以我已经将Json代码分配给变量的服务器链接，在该变量上我既没有收到任何错误也没有得到O / P

var promise = jQuery.parseJSON ('{ "type": "FeatureCollection","crs":{"type": "name","properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84"}},"features": [{"type": "Feature", "properties": {"id": 1},"geometry": {"type": "Polygon", "coordinates": [ [  [  -83.52936044652942, 40.30230752849768], [ -83.52924865349425,  40.30230753872012], [ -83.52924666169983, 40.3021800251207 ], [ -83.52935848418728, 40.302181900418084 ], [ -83.52936044652942, 40.30230752849768]]]}}, ]}');
that.map.data.loadGeoJson(promise);

Answer 1

如有疑问，请通过linter / formatter运行：

http://jsonlint.com/

你在JSON中有一个错误，最后是一个逗号：

]]]}}, ]}');
     ^-------TROUBLE MAKER!

或者这个很酷！

http://pro.jsonlint.com/

我既没有收到任何错误

也许周围的代码吞噬了错误。如果您使用var promise = jQuery.parseJSON('DODGY_JSON_HERE')代码并在控制台中运行，则会看到错误：

Uncaught SyntaxError: Unexpected token ](…)
   e.extend.parseJSON              @jquery.min.js:2
   (anonymous function)            @VM270:2
   InjectedScript._evaluateOn      @VM268:875
   InjectedScript._evaluateAndWrap @VM268:808
   InjectedScript.evaluate         @VM268:664

不像短信一样方便，但至少你看到错误。

Answer 2

无效的JSON显然不可解析：

...snip...[ -83.52936044652942, 40.30230752849768]]]}}, ]}');
                                                       ^----

Answer 3

因为这不是正确的JSON。最后还有其他逗号。

{＆＃34; type＆＃34;：＆＃34; FeatureCollection＆＃34;，＆＃34; crs＆＃34;：{＆＃34; type＆＃34;：＆＃34; name＆＃34;，＆＃34;属性＆＃34;：{＆＃34;名称＆＃34;：＆＃34; urn：ogc：def：crs：OGC：1.3：CRS84＆＃34;}}，＆＃34;功能＆＃34; ：[{＆＃34; type＆＃34;：＆＃34; Feature＆＃34;，＆＃34; properties＆＃34;：{＆＃34; id＆＃34;：1}，＆＃34; geometry＆＃34 ;：{＆＃34;输入＆＃34;：＆＃34;多边形＆＃34;，＆＃34;坐标＆＃34;：[[[-83.52936044652942,40.30230752849768]，[ - 83.52924865349425,40.30230753872012]，[ - 83.52924666169983， 40.3021800251207]，[ - 83.52935848418728,40.302181900418084]，[ - 83.52936044652942,40.30230752849768]]]}}]}

这是正确的JSON：

{
    "type": "FeatureCollection",
    "crs": {
        "type": "name",
        "properties": {
            "name": "urn:ogc:def:crs:OGC:1.3:CRS84"
        }
    },
    "features": [
        {
            "type": "Feature",
            "properties": {
                "id": 1
            },
            "geometry": {
                "type": "Polygon",
                "coordinates": [
                    [
                        [
                            -83.52936044652942,
                            40.30230752849768
                        ],
                        [
                            -83.52924865349425,
                            40.30230753872012
                        ],
                        [
                            -83.52924666169983,
                            40.3021800251207
                        ],
                        [
                            -83.52935848418728,
                            40.302181900418084
                        ],
                        [
                            -83.52936044652942,
                            40.30230752849768
                        ]
                    ]
                ]
            }
        }
    ]
}

无法解析Json文件

3 个答案: