Set "original projection parameters" and "result projection parameters", input known points into "projection points", shadow conversion module and projection conversion menu, and input single-point projection conversion function.
Sets the current projection: geographic coordinate system, and the unit can be degrees, minutes, seconds or ddmmss format. According to the data. If the data is 98.78 degrees, then your unit is degrees. And so on.
Set the target projection: projection plane rectangular coordinate system, Gaussian projection, scale denominator is 1, unit is meters, and enter the central longitude according to your longitude range.
Others do not need to be set. Click the projection point button to calculate the geodetic coordinates of the point on the right.
Method of outputting point coordinate data by mapgis
1. First, edit the attribute structure of the point file and add two fields (set the data type as required), such as:
Y-long integer, with 6 integer digits (no sign) and 0 decimal digits (generally accurate to the meter level of integer digits, because GPS navigation in the wild can achieve meter-level accuracy);
X long integer, 7-digit integer, 0-digit decimal.
2. Open the point file in projection transformation, Tools >; Point value conversion attribute, saving point file;
Open the point file you just saved, Tools >; Property to generate a text file.