How to get user's current location?

What are the best marketing practices and solutions for a new real-time location-based mobile app?

• Every new released mobile app needs a marketing strategy and a successful marketing plan to get more users and generate more data. Specifically it's like "chicken and egg problem" for a real-time location based mobile app that provides specific information based on the current location:  new users are not willing to join the mobile app because there is not enough information when a new app launched. On the other hand, there is not enough information in the system to feed users until people start to use the mobile app and generate more data. The questions is how a successful real-time location-based app can get more users and keep the balance between users and data as well.

• Answer:

  At the beginning, the owner should have some connections to kick start the data collection... friends, family, colleagues, partners, anyone that can install.  Start from there. Next, try offering an incentive to people for entering data? or for using the app. Then add traditional marketing and the rest can be left to work of mouth