问题：
确定运输方向有什么问题？
申屠浩歌
当我使用此url获取行驶方向时，它会正确地获取json，并且工作正常：
http://maps.googleapis.com/maps/api/directions/json?origin=sourcelat，sourcelog
当我想获得运输方向时，我使用这个url，但它不起作用：
http://maps.googleapis.com/maps/api/directions/json?origin=sourcelat，sourcelog
谁能告诉我我的问题是什么？来源地和目的地都在巴黎。
共有1个答案
钦永贞
请求中转方向时，必须指定出发时间或到达时间中的一个。自UTC 1970年1月1日午夜起，这些时间以秒为单位表示。
以下URL请求2013年9月29日（星期日）中午从卢浮宫到埃菲尔铁塔的交通方向。http://maps.googleapis.com/maps/api/directions/json?origin=48.8611,2.3364
以下是JSON的回应：
{
"routes" : [
{
"bounds" : {
"northeast" : {
"lat" : 48.862972,
"lng" : 2.3367707
},
"southwest" : {
"lat" : 48.855014,
"lng" : 2.2890295
}
},
"copyrights" : "Map data ©2013 Cybercity, Google",
"legs" : [
{
"arrival_time" : {
"text" : "2:37pm",
"time_zone" : "Europe/Paris",
"value" : 1380458251
},
"departure_time" : {
"text" : "2:00pm",
"time_zone" : "Europe/Paris",
"value" : 1380456000
},
"distance" : {
"text" : "4.9 km",
"value" : 4885
},
"duration" : {
"text" : "38 mins",
"value" : 2251
},
"end_address" : "Avenue Anatole France, 75007 Paris, France",
"end_location" : {
"lat" : 48.858329,
"lng" : 2.2946919
},
"start_address" : "Cour Carrée et Pyramide du Louvre, 75001 Paris, France",
"start_location" : {
"lat" : 48.8610339,
"lng" : 2.3367707
},
"steps" : [
{
"distance" : {
"text" : "1.1 km",
"value" : 1061
},
"duration" : {
"text" : "13 mins",
"value" : 809
},
"end_location" : {
"lat" : 48.860817,
"lng" : 2.325676
},
"html_instructions" : "Walk to Musée d'Orsay",
"polyline" : {
"points" : "mdfiHykgMh@P|At@@?@@?@?B?B}ApJCDC?CXIb@Id@vBfAXNFDFDFDGb@gAdIg@zDDNBNDT?@?B@B@B?BBB@B@?PN@@@@BH^V|AbAZTRt@ER[|ASz@KPEFEHELQd@_@bA[z@KXIXG\\a@pBS~@PJU|@"
},
"start_location" : {
"lat" : 48.8610339,
"lng" : 2.3367707
},
"steps" : [
{
"distance" : {
"text" : "0.3 km",
"value" : 275
},
"duration" : {
"text" : "3 mins",
"value" : 198
},
"end_location" : {
"lat" : 48.8609596,
"lng" : 2.3339723
},
"html_instructions" : "Head \u003cb\u003esouth\u003c/b\u003e on \u003cb\u003eCour Carrée et Pyramide du Louvre\u003c/b\u003e toward \u003cb\u003ePl. du Carrousel\u003c/b\u003e",
"polyline" : {
"points" : "mdfiHykgMh@P|At@@?@@?@?B?B}ApJCDC?CXIb@Id@"
},
"start_location" : {
"lat" : 48.8610339,
"lng" : 2.3367707
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.1 km",
"value" : 103
},
"duration" : {
"text" : "1 min",
"value" : 78
},
"end_location" : {
"lat" : 48.8601075,
"lng" : 2.3334357
},
"html_instructions" : "Turn \u003cb\u003eleft\u003c/b\u003e onto \u003cb\u003ePl. du Carrousel\u003c/b\u003e",
"maneuver" : "turn-left",
"polyline" : {
"points" : "_dfiHizfMvBfAXNFDFDFD"
},
"start_location" : {
"lat" : 48.8609596,
"lng" : 2.3339723
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 211
},
"duration" : {
"text" : "3 mins",
"value" : 171
},
"end_location" : {
"lat" : 48.8607092,
"lng" : 2.3306935
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e onto \u003cb\u003eQuai François Mitterrand\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "u~eiH_wfMGb@gAdIg@zD"
},
"start_location" : {
"lat" : 48.8601075,
"lng" : 2.3334357
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 170
},
"duration" : {
"text" : "2 mins",
"value" : 137
},
"end_location" : {
"lat" : 48.8595728,
"lng" : 2.3293037
},
"html_instructions" : "Slight \u003cb\u003eleft\u003c/b\u003e onto \u003cb\u003ePont Royal\u003c/b\u003e",
"maneuver" : "turn-slight-left",
"polyline" : {
"points" : "mbfiHyefMDNBNDT?@?B@B@B?BBB@B@?PN@@@@BH^V|AbAZTRt@"
},
"start_location" : {
"lat" : 48.8607092,
"lng" : 2.3306935
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "71 m",
"value" : 71
},
"duration" : {
"text" : "1 min",
"value" : 51
},
"end_location" : {
"lat" : 48.8598405,
"lng" : 2.3284286
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e onto \u003cb\u003eQuai Anatole France\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "i{eiHc}eMER[|ASz@"
},
"start_location" : {
"lat" : 48.8595728,
"lng" : 2.3293037
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 205
},
"duration" : {
"text" : "2 mins",
"value" : 140
},
"end_location" : {
"lat" : 48.860707,
"lng" : 2.325993
},
"html_instructions" : "Slight \u003cb\u003eright\u003c/b\u003e\u003cdiv style=\"font-size:0.9em\"\u003eDestination will be on the left\u003c/div\u003e",
"maneuver" : "turn-slight-right",
"polyline" : {
"points" : "_}eiHuweMKPEFEHELQd@_@bA[z@KXIXG\\a@pBS~@PJ"
},
"start_location" : {
"lat" : 48.8598405,
"lng" : 2.3284286
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "26 m",
"value" : 26
},
"duration" : {
"text" : "1 min",
"value" : 34
},
"end_location" : {
"lat" : 48.860817,
"lng" : 2.325676
},
"polyline" : {
"points" : "mbfiHmheMU|@"
},
"start_location" : {
"lat" : 48.860707,
"lng" : 2.325993
},
"travel_mode" : "WALKING"
}
],
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "3.2 km",
"value" : 3151
},
"duration" : {
"text" : "7 mins",
"value" : 442
},
"end_location" : {
"lat" : 48.855014,
"lng" : 2.289154
},
"html_instructions" : "Train towards Versailles - Château / Saint-Quentin / Chaville - Vélizy / Pontoise",
"polyline" : {
"points" : "ccfiHofeMVNgJpc@}@hGU|BIvBJrVFrN@tKPrZNpSBf@XlG~BtLpDlJlJnOtHrL|CzCnBp@zCrAxAz@FW"
},
"start_location" : {
"lat" : 48.860817,
"lng" : 2.325676
},
"transit_details" : {
"arrival_stop" : {
"location" : {
"lat" : 48.855014,
"lng" : 2.289154
},
"name" : "Champ de Mars - Tour Eiffel"
},
"arrival_time" : {
"text" : "2:28pm",
"time_zone" : "Europe/Paris",
"value" : 1380457730
},
"departure_stop" : {
"location" : {
"lat" : 48.860817,
"lng" : 2.325676
},
"name" : "Musée d'Orsay"
},
"departure_time" : {
"text" : "2:21pm",
"time_zone" : "Europe/Paris",
"value" : 1380457288
},
"headsign" : "Versailles - Château / Saint-Quentin / Chaville - Vélizy / Pontoise",
"headway" : 478,
"line" : {
"agencies" : [
{
"name" : "RATP - SNCF"
}
],
"color" : "#f2c71c",
"short_name" : "RER C",
"text_color" : "#000000",
"vehicle" : {
"icon" : "//maps.gstatic.com/mapfiles/transit/iw/6/rail.png",
"local_icon" : "//maps.gstatic.com/mapfiles/transit/iw/6/fr-paris-rail.png",
"name" : "Train",
"type" : "HEAVY_RAIL"
}
},
"num_stops" : 3
},
"travel_mode" : "TRANSIT"
},
{
"distance" : {
"text" : "0.7 km",
"value" : 673
},
"duration" : {
"text" : "9 mins",
"value" : 519
},
"end_location" : {
"lat" : 48.858329,
"lng" : 2.2946919
},
"html_instructions" : "Walk to Avenue Anatole France, 75007 Paris, France",
"polyline" : {
"points" : "y~diHeb~LcMuJQVACO_@K]cAiBaAcBo@cAqAwBLWm@cAbCmE"
},
"start_location" : {
"lat" : 48.855014,
"lng" : 2.289154
},
"steps" : [
{
"distance" : {
"text" : "0.3 km",
"value" : 285
},
"duration" : {
"text" : "4 mins",
"value" : 225
},
"end_location" : {
"lat" : 48.857269,
"lng" : 2.291018
},
"polyline" : {
"points" : "y~diHeb~LcMuJ"
},
"start_location" : {
"lat" : 48.855014,
"lng" : 2.289154
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 235
},
"duration" : {
"text" : "3 mins",
"value" : 186
},
"end_location" : {
"lat" : 48.8588284,
"lng" : 2.2932032
},
"html_instructions" : "Head \u003cb\u003enortheast\u003c/b\u003e on \u003cb\u003eQuai Branly\u003c/b\u003e toward \u003cb\u003ePromenade d'Australie\u003c/b\u003e",
"polyline" : {
"points" : "}leiH{m~LQVACO_@K]cAiBaAcBo@cAqAwB"
},
"start_location" : {
"lat" : 48.857269,
"lng" : 2.291018
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "11 m",
"value" : 11
},
"duration" : {
"text" : "1 min",
"value" : 12
},
"end_location" : {
"lat" : 48.8587578,
"lng" : 2.2933179
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "uveiHo{~LLW"
},
"start_location" : {
"lat" : 48.8588284,
"lng" : 2.2932032
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "36 m",
"value" : 36
},
"duration" : {
"text" : "1 min",
"value" : 27
},
"end_location" : {
"lat" : 48.858994,
"lng" : 2.2936589
},
"html_instructions" : "Turn \u003cb\u003eleft\u003c/b\u003e",
"maneuver" : "turn-left",
"polyline" : {
"points" : "gveiHg|~Lm@cA"
},
"start_location" : {
"lat" : 48.8587578,
"lng" : 2.2933179
},
"travel_mode" : "WALKING"
},
{
"distance" : {
"text" : "0.1 km",
"value" : 106
},
"duration" : {
"text" : "1 min",
"value" : 69
},
"end_location" : {
"lat" : 48.858329,
"lng" : 2.2946919
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e\u003cdiv style=\"font-size:0.9em\"\u003eDestination will be on the right\u003c/div\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "uweiHk~~LbCmE"
},
"start_location" : {
"lat" : 48.858994,
"lng" : 2.2936589
},
"travel_mode" : "WALKING"
}
],
"travel_mode" : "WALKING"
}
],
"via_waypoint" : []
}
],
"overview_polyline" : {
"points" : "mdfiHykgMh@P|At@B@}AzJGDCXShApCvANJFDGb@oB`OH^F^FNVRBH^VxBxARt@ERo@xC]p@mAdDUr@i@nCS~@PJU|@VNgJpc@}@hGU|BIvBRff@@tKPrZRxTXlG~BtLpDlJlJnOtHrL|CzCnBp@zCrAxAz@FWcMuJQVQc@K]cAiBqBgDqAwBLWm@cAbCmE"
},
"summary" : "",
"warnings" : [
"Walking directions are in beta. Use caution – This route may be missing sidewalks or pedestrian paths."
],
"waypoint_order" : []
}
],
"status" : "OK"
}
参考：谷歌方向API:RequestParameters
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