Java map library
OpenGL vector-tile rendering
Themeable vector layers
Support for multiple tile sources:
- primary opensciencemap (.vtm)
- mapsforge files
- experimental mapnik-vector-tile source
- bitmap: any quadtree-scheme tiles as texture
Backends:
- Android
- Desktop
- HTML5/WebGL (through libgdx and GWT)
- iOS sooner or later

Getting started

git clone --recursive https://github.com/opensciencemap/vtm

cd vtm/vtm-android-app/assets && ln -s ../../vtm/assets/* .

Projects

vtm contains the core library
vtm-android Android backend (no libgdx required)
vtm-android-example provides examples using vtm-android
vtm-android-app opensciencemap app using vtm-android
vtm-gdx common libgdx backend code
vtm-gdx-desktop Desktop application
vtm-gdx-html HTML5/GWT application
vtm-gdx-android Android application using libgdx backend

Eclipse

Import all 'vtm' projects that you need into Eclipse.

Gradle / Android-Studio

Just import build.gradle - should work, not much tested though.
Or run gradle tasks from the commandline:
./gradlew clean install
to build the libraries and add them to the local maven repository.
./gradlew :vtm-android-example:installDebug
to run the android example
./gradlew :vtm-gdx-desktop:run
to run the desktop demo (only Linux and Win64 or compile the native libs)

WebGL Demo

http://opensciencemap.org/map/#scale=17,rot=61,tilt=51,lat=53.075,lon=8.807

hold right mouse button to change view direction
Keys: g toggle tile-grid layer d default- t tubes- r osmarender-theme

Credits

This library contains code from several projects:

mapsforge: based on 0.2.4 (http://mapsforge.org)
osmdroid: some overlay classes (http://code.google.com/p/osmdroid/)
libgdx: AsyncTask, MathUtils and Interpolation classes (https://github.com/libgdx)
Android: some Matrix code, TimSort (http://source.android.com)
tessellate: (https://github.com/cscheid/tessellate)

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Objective-C 1.2%

Other 0.9%