Add a check if GPS data is null

[cghiorzi]

Some devices with GPS only report lat. /long and not altitude, such as a Windows Surface tablet. We should check for null data and translate it to zero to avoid query problems in HAWQ.

[ktelep]

We should see if there's a more appropriate value to put in to translate
lat and long if it does return null, since a 0 is not necessarily invalid
data....

On Thu, Apr 30, 2015 at 8:50 AM, cghiorzi notifications@github.com wrote:

Some devices with GPS only report lat. /long and not altitude, such as a
Windows Surface tablet. We should check for null data and translate it to
zero to avoid query problems in HAWQ.

—
Reply to this email directly or view it on GitHub
#11.

[cghiorzi]

While it is true that 0 is a valid value for Lat and Long, I think translating to 0 is ok, since Lat 0 Long 0 is in the ocean off the coast of Africa.