Elevations

Does anyone know of a good android application that can be used to give accurate elevations that i could use  to get the elevations of my data measurement points during calibration?

Parents Reply Children
  • I just looked up the Root Mean Square Error for Google Earth elevation data and it is only 6.213 m, which I would not consider to be accurate enough for modeling, except for very rough checking in hilly areas.

  • And I am considering whether or not I should use fire hydrant test for calibration or if I can simply collect field data during peak hours. From what I understand this would be dependent on the amount of velocity of the water traveling within the pipes. So my question is at what velocity's can the modeler be assured that they would be capturing the impact of ,pipe roughness, closed valves and demand errors to a significant degree. Because if  the velocity in my system is reaching that velocity during peak hours I could simply set out a bunch of pressure and flow loggers during peak hour and calibrate based on that instead of having to conduct a bunch of fire flow tests.