I noticed that the elevation data differs on a route along a single street depending on wether I use the forward or the backwards route. Down below I included an example of a single street in Monaco. As you can see the first coordinate in the forward case is the same as the last in the backwards case (7.435213, 43.750089) but in the one request the elevation is given with 96.1 and in the other request with 107.2.
Is this expected behaviour and I simple miss something?
Forward Case:
curl -X POST -H "Content-Type: application/json" -H 'Authorization: xxx' -d '{"coordinates": [[7.4352131,43.7500887],[7.434852,43.7508702]],"elevation": true,"extra_info": ["steepness"]}}' https://api.openrouteservice.org/v2/directions/driving-car/geojson | jq
{
"type": "FeatureCollection",
"features": [
{
"bbox": [
7.434755,
43.749975,
96.14,
7.435286,
43.750878,
107.75
],
"type": "Feature",
"properties": {
"ascent": 11.6,
"descent": 0,
"segments": [
{
"distance": 239.3,
"duration": 57.4,
"steps": [
{
"distance": 239.3,
"duration": 57.4,
"type": 11,
"instruction": "Head southwest on Avenue Delphine",
"name": "Avenue Delphine",
"way_points": [
0,
19
]
},
{
"distance": 0,
"duration": 0,
"type": 10,
"instruction": "Arrive at Avenue Delphine, straight ahead",
"name": "-",
"way_points": [
19,
19
]
}
],
"ascent": 11.631523068745949,
"descent": 0.045075352986671646
}
],
"extras": {
"steepness": {
"values": [
[
0,
19,
2
]
],
"summary": [
{
"value": 2,
"distance": 239.3,
"amount": 100
}
]
}
},
"way_points": [
0,
19
],
"summary": {
"distance": 239.3,
"duration": 57.4
}
},
"geometry": {
"coordinates": [
[
7.435213,
43.750089,
96.1
],
[
7.435213,
43.750089,
102.6
],
[
7.435019,
43.749975,
105.4
],
[
7.43497,
43.749986,
105.9
],
[
7.43497,
43.750043,
106.2
],
[
7.435253,
43.750232,
106.9
],
[
7.435262,
43.750266,
107
],
[
7.4352,
43.750382,
107.1
],
[
7.435286,
43.750537,
107.1
],
[
7.435261,
43.750568,
107.1
],
[
7.435212,
43.750549,
107.1
],
[
7.434969,
43.750326,
107.2
],
[
7.434894,
43.750289,
107.2
],
[
7.434798,
43.750285,
107.2
],
[
7.434755,
43.750347,
107.2
],
[
7.434867,
43.750564,
107.8
],
[
7.43493,
43.750841,
107.7
],
[
7.434924,
43.750864,
107.7
],
[
7.434881,
43.750878,
107.7
],
[
7.434852,
43.75087,
107.7
]
],
"type": "LineString"
}
}
],
"bbox": [
7.434755,
43.749975,
96.14,
7.435286,
43.750878,
107.75
],
"metadata": {
"attribution": "openrouteservice.org | OpenStreetMap contributors",
"service": "routing",
"timestamp": 1647620483537,
"query": {
"coordinates": [
[
7.4352131,
43.7500887
],
[
7.434852,
43.7508702
]
],
"profile": "driving-car",
"format": "geojson",
"elevation": true,
"extra_info": [
"steepness"
]
},
"engine": {
"version": "6.7.0",
"build_date": "2022-02-18T19:37:41Z",
"graph_date": "2022-02-21T14:34:17Z"
}
}
}
Backward case:
curl -X POST -H "Content-Type: application/json" -H 'Authorization: xxx' -d '{"coordinates": [[7.434852,43.7508702],[7.4352131,43.7500887]],"elevation": true,"extra_info": ["steepness"]}}' https://api.openrouteservice.org/v2/directions/driving-car/geojson | jq
{
"type": "FeatureCollection",
"features": [
{
"bbox": [
7.434755,
43.749975,
107.24,
7.435286,
43.750878,
108.48
],
"type": "Feature",
"properties": {
"ascent": 0.2,
"descent": 1.4,
"segments": [
{
"distance": 239.3,
"duration": 57.4,
"steps": [
{
"distance": 239.3,
"duration": 57.4,
"type": 11,
"instruction": "Head east on Avenue Delphine",
"name": "Avenue Delphine",
"way_points": [
0,
19
]
},
{
"distance": 0,
"duration": 0,
"type": 10,
"instruction": "Arrive at Avenue Delphine, straight ahead",
"name": "-",
"way_points": [
19,
19
]
}
],
"ascent": 0.17026644314036332,
"descent": 1.4161145266364628
}
],
"extras": {
"steepness": {
"values": [
[
0,
19,
0
]
],
"summary": [
{
"value": 0,
"distance": 239.3,
"amount": 100
}
]
}
},
"way_points": [
0,
19
],
"summary": {
"distance": 239.3,
"duration": 57.4
}
},
"geometry": {
"coordinates": [
[
7.434852,
43.75087,
108.5
],
[
7.434881,
43.750878,
108.2
],
[
7.434924,
43.750864,
108.1
],
[
7.43493,
43.750841,
108.1
],
[
7.434867,
43.750564,
108
],
[
7.434755,
43.750347,
107.9
],
[
7.434798,
43.750285,
107.9
],
[
7.434894,
43.750289,
107.8
],
[
7.434969,
43.750326,
107.8
],
[
7.435212,
43.750549,
107.7
],
[
7.435261,
43.750568,
107.7
],
[
7.435286,
43.750537,
107.7
],
[
7.4352,
43.750382,
107.7
],
[
7.435262,
43.750266,
107.7
],
[
7.435253,
43.750232,
107.7
],
[
7.43497,
43.750043,
107.7
],
[
7.43497,
43.749986,
107.7
],
[
7.435019,
43.749975,
107.7
],
[
7.435213,
43.750089,
107.8
],
[
7.435213,
43.750089,
107.2
]
],
"type": "LineString"
}
}
],
"bbox": [
7.434755,
43.749975,
107.24,
7.435286,
43.750878,
108.48
],
"metadata": {
"attribution": "openrouteservice.org | OpenStreetMap contributors",
"service": "routing",
"timestamp": 1647619800778,
"query": {
"coordinates": [
[
7.434852,
43.7508702
],
[
7.4352131,
43.7500887
]
],
"profile": "driving-car",
"format": "geojson",
"elevation": true,
"extra_info": [
"steepness"
]
},
"engine": {
"version": "6.7.0",
"build_date": "2022-02-18T19:37:41Z",
"graph_date": "2022-02-21T14:34:17Z"
}
}
}
