OSRM vs OpenStreetMap: What are the differences?

Introduction

In this Markdown code, we will discuss the key differences between OSRM (Open Source Routing Machine) and OpenStreetMap (OSM).

1. Processing and Routing: OSRM is a software that uses OpenStreetMap data and processes it to provide routing information. It optimizes the data for routing calculations in terms of time, distance, and other factors. On the other hand, OpenStreetMap is a collaborative mapping project that crowd-sources geographic data from volunteers worldwide.

2. Database Structure: OSRM uses its own custom data structure called contraction hierarchies, which allows for faster and more efficient routing calculations. It preprocesses the map data and creates a compact graph structure, enabling quicker response times. OpenStreetMap, on the other hand, stores its data in a more traditional database format, allowing for flexible querying and editing.

3. Routing Algorithms: OSRM utilizes sophisticated routing algorithms such as Dijkstra's algorithm, A* algorithm, and the contraction hierarchies algorithm. These algorithms enable fast, efficient, and accurate routing calculations for various modes of transportation. OpenStreetMap, however, does not provide routing algorithms on its own. It simply offers the raw map data, which can be used with different routing engines or software.

4. Customization and Development: OSRM offers a more streamlined and developer-friendly interface with various APIs and tools for customization. Developers can integrate OSRM into their applications and tailor the routing engine to their specific needs. OpenStreetMap, on the other hand, is more focused on providing open and accessible map data without specific routing capabilities. It encourages third-party developers to build upon the OSM data to create their own routing solutions.

5. Updates and Data Accuracy: OSRM relies on the map data provided by OpenStreetMap. Therefore, any updates or changes made to the OpenStreetMap database reflect in the routing calculations performed by OSRM. OpenStreetMap, being a collaborative project, ensures that the data is constantly updated by the community of contributors. This ongoing collaborative effort ensures that the map data remains accurate and up to date.

6. Access and Availability: OSRM is available as an open-source software, allowing users to host their own instances and have full control over the routing engine. OpenStreetMap, being an open project, provides its data under an open license, allowing for widespread access and usage. Users can access the OSM data and utilize it with various routing engines, including OSRM.

In summary, OSRM is a software specifically designed for processing and routing OpenStreetMap data. It uses custom data structures and routing algorithms to provide fast and efficient routing calculations. OpenStreetMap, on the other hand, is a collaborative mapping project that provides open map data, allowing developers to build their own routing solutions.