The API provides operator brand logos as part of the external resource. These logos are available for estimated routing and you can obtain them using the companyLogo attribute in lineattributes. If a logo is available, it is returned as follows:

"companyLogo": {
  "resourceType": "vendorIcon",
  "filename": "1611547c89c9be1164df5a04d8f393f9"
}

To obtain the company logo, you can use the filename via the HERE Map Image API. An example request is shown below:

https://image.maps.api.here.com/mia/1.6/companylogo
  ?app_id={YOUR_APP_ID}
  &app_code={YOUR_APP_CODE}
  &logoid=1611547c89c9be1164df5a04d8f393f9
  &w=256
  &h=256

The response contains a logo for a Berlin train station:

Figure 1. Berlin Train Station Logo