Route calculation is not accurate while importing route from a list of points - HERE SDK for Android/iOS(Premium Edition) - here-api

Question

We're trying to use CoreRouter.calculateRoute(List<GeoCoordinate>, RouteOptions, Listener) method as documented here to calculate a route from a list of points. The list of points is from a GPX file exported from Google map.
Please check the origin route on google map here
origin route
(https://www.google.com/maps/d/u/0/edit?mid=1jlwfml-kg0QLW7vHB4aMw6pDjvTevHU&usp=sharing)
The result we got in HERE MAP is like this:
HERE Map result
We compared the route points one by one between Google Map and HERE Map, and found that the point does not sit perfectly on a road on Here map as it does on Google map. Please check the comparison here: Comparison
The list of points:
<trkpt lat="37.3665039" lon="-121.9179512">
<name>TP0</name>
</trkpt>
<trkpt lat="37.3663126" lon="-121.9178105">
<name>TP1</name>
</trkpt>
<trkpt lat="37.3660126" lon="-121.9175858">
<name>TP2</name>
</trkpt>
<trkpt lat="37.3657063" lon="-121.9173579">
<name>TP3</name>
</trkpt>
<trkpt lat="37.3653819" lon="-121.9171101">
<name>TP4</name>
</trkpt>
<trkpt lat="37.3652228" lon="-121.916993">
<name>TP5</name>
</trkpt>
<trkpt lat="37.3653404" lon="-121.9167218">
<name>TP6</name>
</trkpt>
<trkpt lat="37.3657065" lon="-121.9159425">
<name>TP7</name>
</trkpt>
<trkpt lat="37.3659858" lon="-121.9153481">
<name>TP8</name>
</trkpt>
<trkpt lat="37.366333" lon="-121.9146232">
<name>TP9</name>
</trkpt>
<trkpt lat="37.3663824" lon="-121.9145151">
<name>TP10</name>
</trkpt>
<trkpt lat="37.3666919" lon="-121.9139078">
<name>TP11</name>
</trkpt>
<trkpt lat="37.366698" lon="-121.9137683">
<name>TP12</name>
</trkpt>
<trkpt lat="37.3666968" lon="-121.913702">
<name>TP13</name>
</trkpt>
<trkpt lat="37.3666941" lon="-121.9136539">
<name>TP14</name>
</trkpt>
<trkpt lat="37.3666879" lon="-121.9136134">
<name>TP15</name>
</trkpt>
<trkpt lat="37.3666756" lon="-121.913573">
<name>TP16</name>
</trkpt>
<trkpt lat="37.3666331" lon="-121.913451">
<name>TP17</name>
</trkpt>
<trkpt lat="37.3664775" lon="-121.9133349">
<name>TP18</name>
</trkpt>
<trkpt lat="37.3659049" lon="-121.9129044">
<name>TP19</name>
</trkpt>
<trkpt lat="37.3658757" lon="-121.9129628">
<name>TP20</name>
</trkpt>
Is there a way to calculate the route more accurate using CoreRouter.calculateRoute(List<GeoCoordinate>, RouteOptions, Listener) method?
The code in our project is like below:
val TESTING_WAYPOINTS = arrayOf(
GeoCoordinate(37.3665039, -121.9179512),
GeoCoordinate(37.3663126, -121.9178105),
GeoCoordinate(37.3660126, -121.9175858),
GeoCoordinate(37.3657063, -121.9173579),
GeoCoordinate(37.3653819, -121.9171101),
GeoCoordinate(37.3652228, -121.916993),
GeoCoordinate(37.3653404, -121.9167218),
GeoCoordinate(37.3657065, -121.9159425),
GeoCoordinate(37.3659858, -121.9153481),
GeoCoordinate(37.366333, -121.9146232),
GeoCoordinate(37.3663824, -121.9145151),
GeoCoordinate(37.3666919, -121.9139078),
GeoCoordinate(37.366698, -121.9137683),
GeoCoordinate(37.3666968, -121.913702),
GeoCoordinate(37.3666941, -121.9136539),
GeoCoordinate(37.3666879, -121.9136134),
GeoCoordinate(37.3666756, -121.913573),
GeoCoordinate(37.3666331, -121.913451),
GeoCoordinate(37.3664775, -121.9133349),
GeoCoordinate(37.3659049, -121.9129044),
GeoCoordinate(37.366377, -121.9137508),
GeoCoordinate(37.3658757, -121.9129628),
)
// set route options
val mRouteOptions = RouteOptions().apply {
this.transportMode = RouteOptions.TransportMode.CAR
this.routeCount = navigationOptions.routeCount
this.routeType = navigationOptions.routeType
setTunnelsAllowed(navigationOptions.tunnelAllowed)
setTollRoadsAllowed(navigationOptions.tollAllowed)
setHighwaysAllowed(navigationOptions.highwaysAllowed)
setFerriesAllowed(navigationOptions.boatsAllowed)
setDirtRoadsAllowed(navigationOptions.dirtRoadsAllowed)
this.locale = Locale("en")
})
fun calculateRoute(listener: CoreRouter.Listener) {
mCoreRouterListener = listener
// force using the preset waypoints
val presetWaypoints = TESTING_WAYPOINTS
for (p in presetWaypoints) {
Log.d(TAG, "[TRACK]: ${p.latitude} ${p.longitude}")
mRoutePoints.add(p)
}
mCoreRouter.calculateRoute(mRoutePoints, mRouteOptions, this)
}

Answer 1

As we see lot of options are used in the request. So the router will try to find the best optimized route based on the options provided in the request. If you want to compare the requests with any other service, just use the plain requests without any restrictions in both services.
// set route options
val mRouteOptions = RouteOptions().apply {
this.transportMode = RouteOptions.TransportMode.CAR
this.routeCount = navigationOptions.routeCount
this.routeType = navigationOptions.routeType
setTunnelsAllowed(navigationOptions.tunnelAllowed)
setTollRoadsAllowed(navigationOptions.tollAllowed)
setHighwaysAllowed(navigationOptions.highwaysAllowed)
setFerriesAllowed(navigationOptions.boatsAllowed)
setDirtRoadsAllowed(navigationOptions.dirtRoadsAllowed)
this.locale = Locale("en")
})