
Yasser A. answered 03/19/18
Tutor
5
(8)
Ph.D. and M.Sc. in Environmental Planning Using GIS/Remote Sensing
There are a few possible solutions to this:
- A common mistake is possibly you're putting the X or the Y coordinate in a different hemisphere. Check if your study area is the western hemisphere then the X coordinates (Longitudes) should be in negative values, if the study area is located in the southern hemisphere then the Y coordinates (Latitude) should be negative too.
- Also check if you are assigning X to Longitude and Y to Latitude and not the other way around.
- Defining the coordinate system to your point data should not necessarily match those of the countries, you should define their coordinate system based on their data origin. If they're long/lat then they should be Geographic Coordinate System with the proper Datum (NAD83 for north america and WGS84 for World).