CODEWITHSUNDEEP
here-api
user3415655
user3415655

Reputation: 21

Distance Matrix HERE API

I need to calculate the distance between two postcodes(many to one) so for that, I have integrated Routing API(Matrix of Routes) in our system.

I just notice that calculated distance does not match with the Google Distance Matrix API result.

Example:

From PostCode: TR4 8UN(LAT-LONG: 50.28654, -5.15427)
To PostCode: CO11 1QQ(LAT-LONG: 51.95847, 1.06309)

HERE API Distance: 335.71689045 Miles

Google API Distance: 356 Miles

Supplied following params in the request:

Req URL:https://matrix.route.api.here.com/routing/7.2/calculatematrix.json

Params:mode=fastest;car;traffic:disabled;motorway:-2&summaryAttributes=distance

Can you please help with this? why it's different? which one is more accurate?

Upvotes: 2

Views: 1802

Answers (1)

user3505695
user3505695

Reputation:

Please refer to the documentation: Summaries of routes in the calculatematrix response are computed using heuristic algorithms optimized for M:N routes computation. They differ from algorithms used in the calculateroute resource therefore the route summary values may also differ to a certain extent.

The underlying algorithm is using heuristic which drives search depending on the number of start/destinations. Different matrix sizes may give different results and this is expected. We are not able to ensure the same results for different sizes of matrices until we use this heuristic.

Upvotes: 1

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