Hi,
I have planned to implement a simple coordinate reference system browser.
I imagine a dialog where all the supported coordinate systems are shown in a tree control.
The dialog should return the unique Srid value of the selected coordinate system.
Do you have a smart way to look-up the list of the coordinate system names or have I to look-up the pairs of srid and coordinate system names from the *.rtf files found in the folder "Documentation\Projections"
Regards
Niels
Niels,
Thanks for your post!
First, you want to get the Projection String from given Srid, I think that is reasonable, because a valid Srid is always can get a projection string:
Following is the sample code if you turn to MapSuite Core:
Proj4Projection projection = new Proj4Projection(4326, 2004);
//+proj=longlat+ellps=WGS84+datum=WGS84+no_defs
string internalString = projection.InternalProjectionParametersString;
//+proj=tmerc+lat_0=0+lon_0=-62+k=0.9995+x_0=400000+y_0=0+ellps=clrk80+towgs84=174,359,365,0,0,0,0+units=m+no_defs
string extentalString = projection.ExternalProjectionParametersString;
Second, I do not think it is reasonable to get a Srid from a projection string. Reason is a valid projection string maybe not a valid Srid. Or probably I misunderstood your attempt.
For example
//+proj=tmerc+lat_0=0+lon_0=-62+k=0.975+x_0=800000+y_0=0+ellps=clrk80+towgs84=174,354,323,0,0,0,0+units=m+no_defs
This projection string cannot be taken as 2004 Srid, because several parameters has been changed.
Any more questions just let me know.
Thanks
Yale