I would like to use EU-DEM (European Digital Elevation Model) as the elevation data at my instance of ORS (using Docker containers). From reading other posts, the way to do it is by making changes to ORS itself and the GraphHopper libraries used by it.
I’ve identified the repository of ORS to use (GitHub - GIScience/openrouteservice: 🌍 The open source route planner api with plenty of features.) and the GraphHopper fork used with it (GitHub - GIScience/graphhopper: An open source route planning library and server using OpenStreetMap.).
I’ve also identified the module and classes at GraphHopper that are responsible for reading the elevation files. It is the
graphhopper-core module and my target classes are at
graphhopper/core/src/main/java/com/graphhopper/reader/dem/. For now, it looks like I only have to make changes here, by creating a dedicated class to read the EU-DEM files (and integrate that new class in the remaining processes).
Currently, I’m not sure on which branch I should do the changes. From the
pom.xml file at the ORS project, it uses the following version for
<groupId>com.github.GIScience.graphhopper</groupId> <artifactId>graphhopper-core</artifactId> <version>v0.13.15</version>
At the GitHub repo for GraphHopper (the GIScience’s fork) there is a release with the tag
v0.13.15, which looks like it was made from the branch
ors_0.13. This branch has changes specific for ORS, marked with comments
// ORS-GH MOD START.
I’ve tried to build the
graphhopper-core module from the branch
ors_0.13 (by running
mvn package -pl :graphhopper-core -am at the project’s root) but 365 tests failed and the build failed as well.
When building from the branch
master all tests pass and the build is successful.
Which branch should I use to make my changes? It doesn’t looks like using the branch
master is the correct approach, because I may “lose” important changes for ORS.