here

package module
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 Go to latest Published: Mar 6, 2024 License: Apache-2.0 Imports: 11 Imported by: 0

Documentation

Overview

Package here provides a client for measuring distances and durations.

A HERE client requests distance and duration data using HERE Maps API. It makes requests to construct a matrix measure.

The client can construct a distance matrix, a duration matrix, or both.

Each of these functions will use a synchronous request flow if the number of points requested is below HERE's size limit for synchronous API calls - otherwise, an asynchronous flow will be used. The functions all take a context which can be used to cancel the request flow while it is in progress.

These measures implement route.ByIndex.

These matrix-generating functions can also take one or more options that allow you to configure the routes that will be included in the matrices.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

Example

How to create a `Client`, assuming the points are in the form `{longitude, latitude}`. Please note that this example does not define an output as it requires API authentication and is here for illustrative purposes only. 

package main

import (
	"context"
	"fmt"
	"time"

	"github.com/nextmv-io/sdk/route"
	"github.com/nextmv-io/sdk/route/here"
)

func main() {
	points := []route.Point{
		{-74.028297, 4.875835},
		{-74.046965, 4.872842},
		{-74.041763, 4.885648},
	}
	client := here.NewClient("<your-api-key>")

	// All of the matrix-constructing functions take a context as their first
	// parameter, which can be used to cancel a request cycle while it is in
	// progress. For example, it is a good general practice to use this context
	// to impose a timeout.
	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
	defer cancel()

	// Distance and duration matrices can be constructed with the functions
	// provided in the package. These functions will use a synchronous request
	// flow if the number of points requested is below HERE's size limit for
	// synchronous API calls - otherwise, HERE's asynchronous flow will
	// automatically be used.
	dist, dur, err := client.DistanceDurationMatrices(ctx, points)
	if err != nil {
		panic(err)
	}
	_ = dist // We don't use the distance matrix in this example.

	// The matrix functions also take a variadic list of `MatrixOption`s that
	// configure how HERE will calculate the routes. For example, this code
	// constructs a DistanceMeasure with a specific departure time for a
	// bicycle:
	dist, err = client.DistanceMatrix(
		ctx,
		points,
		here.WithTransportMode(here.TransportModeBicycle),
		here.WithDepartureTime(time.Date(2021, 12, 10, 8, 30, 0, 0, time.Local)),
	)
	if err != nil {
		panic(err)
	}
	_ = dist // We don't use the distance matrix in this example.

	// Or, you can configure a truck profile:
	dist, err = client.DistanceMatrix(
		ctx,
		points,
		here.WithTransportMode(here.TransportModeTruck),
		here.WithTruckProfile(here.Truck{
			Type:                  here.TruckTypeTractor,
			TrailerCount:          2,
			ShippedHazardousGoods: []here.HazardousGood{here.Poison},
		}),
	)
	if err != nil {
		panic(err)
	}

	// Once the measures have been created, you may estimate the distances and
	// durations by calling the Cost function.
	for p1 := range points {
		for p2 := range points {
			fmt.Printf(
				"(%d, %d) = [%.2f, %.2f]\n",
				p1, p2, dist.Cost(p1, p2), dur.Cost(p1, p2),
			)
		}
	}
	// This is the expected output.
	// (0, 0) = [0.00, 0.00]
	// (0, 1) = [6519.00, 791.00]
	// (0, 2) = [4884.00, 632.00]
	// (1, 0) = [5242.00, 580.00]
	// (1, 1) = [0.00, 0.00]
	// (1, 2) = [2270.00, 248.00]
	// (2, 0) = [3800.00, 493.00]
	// (2, 1) = [2270.00, 250.00]
	// (2, 2) = [0.00, 0.00]
}

Output:

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type BoundingBox deprecated 

type BoundingBox struct {
	North float64
	South float64
	East  float64
	West  float64
}

BoundingBox represents a region using four cooordinates corresponding to the furthest points in each of the cardinal directions within that region.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type Client deprecated 

type Client interface {
	// DistanceMatrix retrieves a HERE distance matrix. It uses the async HERE API
	// if there are more than 500 points given.
	//
	// Deprecated: This package is deprecated and will be removed in the next major release.
	// It is used with the router engine which was replaced by
	// [github.com/nextmv-io/sdk/measure/here].
	DistanceMatrix(
		ctx context.Context,
		points []route.Point,
		opts ...MatrixOption,
	) (route.ByIndex, error)
	// DurationMatrix retrieves a HERE duration matrix. It uses the async HERE API
	// if there are more than 500 points given.
	//
	// Deprecated: This package is deprecated and will be removed in the next major release.
	// It is used with the router engine which was replaced by
	// [github.com/nextmv-io/sdk/measure/here].
	DurationMatrix(
		ctx context.Context,
		points []route.Point,
		opts ...MatrixOption,
	) (route.ByIndex, error)

	// DistanceDurationMatrices retrieves a HERE distance and duration matrix. It
	// uses the async HERE API if there are more than 500 points given.
	//
	// Deprecated: This package is deprecated and will be removed in the next major release.
	// It is used with the router engine which was replaced by
	// [github.com/nextmv-io/sdk/measure/here].
	DistanceDurationMatrices(
		ctx context.Context,
		points []route.Point,
		opts ...MatrixOption,
	) (distances, durations route.ByIndex, err error)
}

Client represents a HERE maps client. See official documentation for HERE topics, getting started.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func NewClient deprecated 

func NewClient(apiKey string, opts ...ClientOption) Client

NewClient returns a new OSRM Client.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type ClientOption deprecated 

type ClientOption func(*client)

ClientOption can pass options to be used with a HERE client.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithClientTransport deprecated 

func WithClientTransport(rt http.RoundTripper) ClientOption

WithClientTransport overwrites the RoundTripper used by the internal http.Client.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithDenyRedirectPolicy deprecated 

func WithDenyRedirectPolicy(hostnames ...string) ClientOption

WithDenyRedirectPolicy block redirected requests to specified hostnames. Matches hostname greedily e.g. google.com will match api.google.com, file.api.google.com, ...

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type Feature deprecated 

type Feature string

Feature represents a geographical feature.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const CarShuttleTrain Feature = "carShuttleTrain"

CarShuttleTrain designates a train that can transport cars.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const ControlledAccessHighway Feature = "controlledAccessHighway"

ControlledAccessHighway designates a controlled access highway.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const DifficultTurns Feature = "difficultTurns"

DifficultTurns represents u-turns, difficult turns, and sharp turns.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const DirtRoad Feature = "dirtRoad"

DirtRoad designates a dirt road.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Ferry Feature = "ferry"

Ferry designates a ferry route.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const SeasonalClosure Feature = "seasonalClosure"

SeasonalClosure designates a route that is closed for the season.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TollRoad Feature = "tollRoad"

TollRoad designates a toll road feature.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Tunnel Feature = "tunnel"

Tunnel designates a tunnel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const UTurns Feature = "uTurns"

UTurns designates u-turns.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type HazardousGood deprecated 

type HazardousGood string

HazardousGood indicates a hazardous good that trucks can transport.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Combustible HazardousGood = "combustible"

Combustible designates combustible materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Corrosive HazardousGood = "corrosive"

Corrosive indicates corrosive materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Explosive HazardousGood = "explosive"

Explosive represents explosive materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Flammable HazardousGood = "flammable"

Flammable designates flammable materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Gas HazardousGood = "gas"

Gas designates gas.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const HarmfulToWater HazardousGood = "harmfulToWater"

HarmfulToWater indicates materials that are harmful to water.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Organic HazardousGood = "organic"

Organic designates organical materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const OtherHazardousGood HazardousGood = "other"

OtherHazardousGood refers to other types of hazardous materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Poison HazardousGood = "poison"

Poison designates poison.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const PoisonousInhalation HazardousGood = "poisonousInhalation"

PoisonousInhalation refers to materials that are poisonous to inhale.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const Radioactive HazardousGood = "radioactive"

Radioactive indicates radioactive materials.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type MatrixOption deprecated 

type MatrixOption func(req *matrixRequest)

MatrixOption is passed to functions on the Client that create matrices, configuring the HERE request the client will make.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithAvoidAreas deprecated 

func WithAvoidAreas(areas []BoundingBox) MatrixOption

WithAvoidAreas sets bounding boxes that will be avoided in the calculated routes.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithAvoidFeatures deprecated 

func WithAvoidFeatures(features []Feature) MatrixOption

WithAvoidFeatures sets features that will be avoided in the calculated routes.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithDepartureTime deprecated 

func WithDepartureTime(t time.Time) MatrixOption

WithDepartureTime sets departure time to be used in the request. This will take traffic data into account for the given time. If no departure time is given, "any" will be used in the request and no traffic data is included, see official documentation for HERE matrix routing, concepts traffic.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithScooterProfile deprecated 

func WithScooterProfile(scooter Scooter) MatrixOption

WithScooterProfile sets a Scooter profile on the request.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithTaxiProfile deprecated 

func WithTaxiProfile(taxi Taxi) MatrixOption

WithTaxiProfile sets a Taxi profile on the request.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithTransportMode deprecated 

func WithTransportMode(mode TransportMode) MatrixOption

WithTransportMode sets the transport mode for the request.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

func WithTruckProfile deprecated 

func WithTruckProfile(t Truck) MatrixOption

WithTruckProfile sets a Truck profile on the matrix request. The following attributes are required by HERE: * TunnelCategory: if this is an empty string, the Client will automatically set it to TunnelCategoryNone * Type * AxleCount.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type Scooter deprecated 

type Scooter struct {
	AllowHighway bool `json:"allowHighway"` //nolint:tagliatelle
}

Scooter captures routing parameters that can be set on scooters.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type Taxi deprecated 

type Taxi struct {
	AllowDriveThroughTaxiRoads bool `json:"allowDriveThroughTaxiRoads"` //nolint:tagliatelle,lll
}

Taxi captures routing parameters that can be set on taxis.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type TransportMode 

type TransportMode string

TransportMode represents the type of vehicle that will be used for the calculated routes.#// Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModeBicycle TransportMode = "bicycle"

TransportModeBicycle causes routes to be calculated for bicycle travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModeCar TransportMode = "car"

TransportModeCar causes routes to be calculated for car travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModePedestrian TransportMode = "pedestrian"

TransportModePedestrian causes routes to be calculated for pedestrian travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModeScooter TransportMode = "scooter"

TransportModeScooter causes routes to be calculated for scooter travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModeTaxi TransportMode = "taxi"

TransportModeTaxi causes routes to be calculated for taxi travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TransportModeTruck TransportMode = "truck"

TransportModeTruck causes routes to be calculated for truck travel.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type Truck deprecated 

type Truck struct {
	ShippedHazardousGoods []HazardousGood `json:"shippedHazardousGoods,omitempty"` //nolint:tagliatelle,lll
	// in kilograms
	GrossWeight int32 `json:"grossWeight,omitempty"` //nolint:tagliatelle
	// in kilograms
	WeightPerAxle int32 `json:"weightPerAxle,omitempty"` //nolint:tagliatelle
	// in centimeters
	Height int32 `json:"height,omitempty"`
	// in centimeters
	Width int32 `json:"width,omitempty"`
	// in centimeters
	Length             int32               `json:"length,omitempty"`
	TunnelCategory     TunnelCategory      `json:"tunnelCategory,omitempty"` //nolint:tagliatelle,lll
	AxleCount          int32               `json:"axleCount,omitempty"`      //nolint:tagliatelle,lll
	Type               TruckType           `json:"type,omitempty"`
	TrailerCount       int32               `json:"trailerCount,omitempty"`       //nolint:tagliatelle,lll
	WeightPerAxleGroup *WeightPerAxleGroup `json:"weightPerAxleGroup,omitempty"` //nolint:tagliatelle,lll
}

Truck captures truck-specific routing parameters.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type TruckType deprecated 

type TruckType string

TruckType specifies the type of truck.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TruckTypeStraight TruckType = "straight"

TruckTypeStraight refers to trucks with a permanently attached cargo area.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TruckTypeTractor TruckType = "tractor"

TruckTypeTractor refers to vehicles that can tow one or more semi-trailers.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type TunnelCategory deprecated 

type TunnelCategory string

TunnelCategory is a tunnel category used to restrict the transport of certain goods.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TunnelCategoryB TunnelCategory = "B"

TunnelCategoryB represents tunnels with B category restrictions.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TunnelCategoryC TunnelCategory = "C"

TunnelCategoryC represents tunnels with C category restrictions.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TunnelCategoryD TunnelCategory = "D"

TunnelCategoryD represents a tunnel with D category restrictions.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TunnelCategoryE TunnelCategory = "E"

TunnelCategoryE represents a tunnel with E category restrictions.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here. 

const TunnelCategoryNone TunnelCategory = "None"

TunnelCategoryNone represents a tunnel with no category restrictions.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

type WeightPerAxleGroup deprecated 

type WeightPerAxleGroup struct {
	Single int32 `json:"single"`
	Tandem int32 `json:"tandem"`
	Triple int32 `json:"triple"`
}

WeightPerAxleGroup captures the weights of different axle groups.

Deprecated: This package is deprecated and will be removed in the next major release. It is used with the router engine which was replaced by github.com/nextmv-io/sdk/measure/here.

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