New product, seems fine to making mapping, but don't know the cost, and whats the advantages/disadvantages comparing to https://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-gps-receiver     

The standard V-Map system now features the following components and functionalities:

 L1/L2 GPS phase measurements recorded on board at 20Hz

 Power input ranging from 5V to 36V

 LED indicator to monitor satellite reception

 LED indicator to monitor proper data storage

 Event marker port

 One PPS outputs

 Removable micro SD card for data retrieval

 Dual frequency helix antenna

The weight of the receiver excluding external cables and antenna is 120g.

V-MAP- PDF (http://www.microaerialprojects.com/wp-content/uploads/2014/07/The-20Hz-V-Map-System-Jul14.pdf)

The EigenCAM app is an imaging and analysis software specifically designed for multi-spectral imaging applications to extract as much information as possible from the images. Promising applications include near infrared photography, vegetation analysis, assisted night vision, authentication, biological detection, urban growth analysis, defeating camouflage, disaster assessment, etc.

http://www.eigenimaging.com/eigenCAM-App

How about this app and camera?

Could be a cheap and great way to have more options.