Are latitude and longitude coordinates allowed when reporting GPS coordinates? What if my GPS unit records in latitude and longitude?
A16: Labs should not be reporting GPS coordinates in latitude and longitude, but rather only in the NJ State Plane Coordinate System, in survey feet units, referenced to the NAD83 datum (see above question). However, if latitude & longitude values are read from the GPS receiver’s display a conversion is necessary before reporting. Make sure there are enough decimals when performing the conversion. Here is what is needed for an accurate conversion: Five (5) decimal places for Decimal Degrees (DD.ddddd) gets a coordinate to within 3 feet; three (3) decimal places for Degrees Decimal Minutes (DD MM.mmm) gets a coordinate to within 5 feet, and one (1) decimal place for Degrees Minutes Decimal Seconds (DD MM SS.s) gets a coordinate to within 9 feet. Caution: If 4 decimal places are used for DD then the coordinate might be only within 30 ft. Similarly, if 2 decimal places are used for DDM then the coordinate might be only within 50 ft, if 0 decimal places are used for DMDS then the coordinat
A6: Labs should not be reporting GPS coordinates in latitude and longitude, but rather only in the NJ State Plane Coordinate System, in survey feet units, referenced to the NAD83 datum (see above question). However, if latitude & longitude values are read from the GPS receiver’s display a conversion is necessary before reporting. Make sure there are enough decimals when performing the conversion. Here is what is needed for an accurate conversion: Five (5) decimal places for Decimal Degrees (DD.ddddd) gets a coordinate to within 3 feet; three (3) decimal places for Degrees Decimal Minutes (DD MM.mmm) gets a coordinate to within 5 feet, and one (1)decimal place for Degrees Minutes Decimal Seconds (DD MM SS.s) gets a coordinate to within 9 feet. Caution: If 4 decimal places are used for DD then the coordinate might be only within 30 ft. Similarly, if 2 decimal places are used for DDM then the coordinate might be only within 50 ft, if 0 decimal places are used for DMDS then the coordinate
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