I have a question regarding EnviroInsite and geographic co-ordinates that I’m hoping you can answer.
In EQuIS we have a facility with 9 locations, the co-ordinates for which are in Lat Long Decimal Degrees (stored with a Unit Code in EQuIS of ‘DD’). When we run an EnviroInsite Data Export on this dataset we are unable to plot the locations as it appears the ‘DD’ unit code is causing a conflict. So to test this I temporarily switched my co-ordinate units from ‘DD’ to ‘m’ but did not change the values of the co-ordinates (i.e. they remained in Lat Long).
This led to success – and the locations plotted.
However, during the plotting process, I noticed the co-ordinate system seems to have changed. In screenshots below you will see the Browse window with my raw value co-ordinates in range -1.87 to 5.82, and then the plot window with bounding box co-ordinates in range of 624100 to 644400? They look suspiciously like WGS84 UTM co-ordinates to me?
Are you able to advise if EI is identifying the raw co-ordinates as Lat Long (even though they have been exported with a co-ordinate unit code of ‘m’) and doing an internal translation to UTM for the plotting process?
When EnviroInsite detects a Latitude field in the Well table it will automatically convert the coordinates to either metric in the UTM, WGS-84 coordinate system or feet in the USA State Plane coordinate system. Which system it opts to use is selected by going to the main menu and selecting View –> Options. Then go to the Document tab and select UTM, WGS-84. Between executions of the program EnviroInsite will recall your preference of UTM, WGS-84 or State Plane and use the system that was last selected.
