[Proj] WGS84 to NAD27 Coordinate conversion in Android

Robb Main rmain.mws at gmail.com
Wed Nov 14 08:15:27 EST 2018

Thanks for your input, Greg.

My existing app codebase is under Android Studio on Windows platform. It
already uses the NDK & JNI wrapper to integrate a support library written
in C, so I'm familiar with the process.

Given my very modest needs (WGS84 coordinates -> NAD27 UTM coordinates),
I'd like to avoid linking in a swiss-army knife, when all I need is the
tooth-pick. I'd also prefer to use a java codebase that will compile
natively (mainly for simplicity & code maintenance considerations) if its

I wasn't aware of OSMAnd - thanks. However, it does not provide coordinate
conversion (which is what I require), and most of the 'detail' provided
appears to be oriented to roadmaps & urban areas. This application concerns
areas literally 'in the middle of no where'. No roads, wifi, or cell

Best Regards.

On Tue, Nov 13, 2018 at 7:19 PM Greg Troxel <gdt at lexort.com> wrote:

> Nicolas Cadieux <nicolas.cadieux at archeotec.ca> writes:
> > Perhaps the easiest way is to link the android tool to the nrcan web
> > tools?  It depends on the availability of wifi or cell coverage.
> In addition to not working in remote areas (and I have used OSMAnd to
> navigate in areas with no cell service, while watching apple maps on
> someone's iPhone totally fail), there's another issue, which is
> informing the user that their data will be sent over the web.   That
> could earn your app the "tracks and reports your activity" antifeature
> on f-droid :-)
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