Uncaught Invalid geoJson format TypeError: Cannot read properties of undefined (reading ‘length‘)

乡镇、街道使用echart时报错解决，在echart.js中找到函数parseGeoJSON，用下边的将其替换即可

function parseGeoJSON(geoJson, nameProperty) {
      geoJson = decode(geoJson);
      return map(filter(geoJson.features, function (featureObj) {
        // Output of mapshaper may have geometry null
        return featureObj.geometry && featureObj.properties && (
                // avoid length error if missing coordinates
                (featureObj.geometry.coordinates && featureObj.geometry.coordinates.length > 0)
                // allow GeometryCollection
                || (featureObj.geometry.geometries && featureObj.geometry.geometries.length > 0)
            )
      }), function (featureObj) {
        var properties = featureObj.properties;
        var geo = featureObj.geometry;
        var geometries = [];

        if (geo.type === 'Polygon') {
          var coordinates = geo.coordinates;
          geometries.push({
            type: 'polygon',
            // According to the GeoJSON specification.
            // First must be exterior, and the rest are all interior(holes).
            exterior: coordinates[0],
            interiors: coordinates.slice(1)
          });
        }

        if (geo.type === 'MultiPolygon') {
          var coordinates = geo.coordinates;
          each(coordinates, function (item) {
            if (item[0]) {
              geometries.push({
                type: 'polygon',
                exterior: item[0],
                interiors: item.slice(1)
              });
            }
          });
        }else if (geo.type === 'GeometryCollection') {
            var geometries2 = geo.geometries;
            each(geometries2, function (geo) { // OR      zrUtil.each(geometries2, function (geo) {
                var coordinates = geo.coordinates;
                if (geo.type === 'Polygon') { // this is a full copy from above
                    geometries.push({
                        type: 'polygon',
                        exterior: coordinates[0],
                        interiors: coordinates.slice(1)
                    });
                } // end full copy
            });
        }

        var region = new GeoJSONRegion(properties[nameProperty || 'name'], geometries, properties.cp);
        region.properties = properties;
        return region;
      });
    }

主要修改下边指出的两个部分

return featureObj.geometry && featureObj.properties && (
                // avoid length error if missing coordinates
                (featureObj.geometry.coordinates && featureObj.geometry.coordinates.length > 0)
                // allow GeometryCollection
                || (featureObj.geometry.geometries && featureObj.geometry.geometries.length > 0)
            )

else if (geo.type === 'GeometryCollection') {
            var geometries2 = geo.geometries;
            each(geometries2, function (geo) { // OR      zrUtil.each(geometries2, function (geo) {
                var coordinates = geo.coordinates;
                if (geo.type === 'Polygon') { // this is a full copy from above
                    geometries.push({
                        type: 'polygon',
                        exterior: coordinates[0],
                        interiors: coordinates.slice(1)
                    });
                } // end full copy
            });
        }

标签：TypeError,undefined,geometries,format,geometry,coordinates,featureObj,var,geo
来源： https://blog.csdn.net/weixin_39983904/article/details/121028006