Reading the above Wikipedia page it sounds like the more recent models have more precision, which means more coefficients, which means a larger file to bundle with the app and an increased APK size. Here's the model data that was bundled with GeoTools:įrom some poking around it seems that these are the coefficients for the EGM84 model, looking at and, which has passing test results that match the EGM84 output of Any idea where I can find similar files for EGM96 or EGM2008? The main issue with using the EGM library is that we have to bundle the geoid model within the app, and I still need to figure out what the size implications on the APK are. But as you mention we now have clear issues with the ortho height and offsets we're getting from NMEA streams (see #503). I ended up not using it and relying on NMEA instead because it was a much lighter-weight solution. Luckily I started down this road in #22 when first starting to add ortho height to the app, and I implemented a port of the Geotools EarthGravitationalModel here that should work on Android:
0 kommentar(er)
