topic Re: XY data projecttion problem in Map Projections Questions

XY data projecttion problem

Muqit_Zoarder — Fri, 12 Aug 2016 14:40:03 GMT

Hello everyone, I was making point data from xls/csv file. But i want to project my data into a Projected coordinate system, not in GCS. As this data is from Germany, so I was trying to make it into DHDN Gauskruger 3 zone 3, but unfortunately this is not working and the dataframe unit is showing decimal, see the attached image bottom right corner. I tried with ESPG 1989 33N also but its same. Any idea?

Regards

muqit

Re: XY data projecttion problem

DanPatterson_Retired — Fri, 12 Aug 2016 14:56:56 GMT

You have to Define Projection first... telling it what it is, not what you want it to be.

Once it is defined, you can use the Project tool

Re: XY data projecttion problem

Muqit_Zoarder — Tue, 16 Aug 2016 08:51:31 GMT

Hello Dan, I am facing trouble to make the disperse locations of similar lat/long values. My projection unit is in meter, I put 1 meter as parameter, but the points are creating at distant locations like 10km or 12 kilometer away, please see the image. I need to view the point markers just beside the actual point.

Re: XY data projecttion problem

TieshengWu — Tue, 16 Aug 2016 09:45:05 GMT

What's your original x,y data like? May be you have lon,lat data, but you difine it as projected coordinate (I see you have 0 degree latitude in your map) ?

Re: XY data projecttion problem

NeilAyres — Tue, 16 Aug 2016 10:36:49 GMT

Exactly as Dan & Wu says.

Judging by the extent values in your original post, your input points were in some form of GCS (lat/long), but they have been defined as the german grid metres.

This is a mistake. Bring the points in a define them correctly first, then project.

Re: XY data projecttion problem

Muqit_Zoarder — Tue, 16 Aug 2016 12:48:43 GMT

Hello Neil, thanks, but i have solved that projection issue. But I cannot create the disperse markers correctly , now points (markers) are creating distant place, like 12 km away from actual place. Any solution?

Regards

Re: XY data projecttion problem

Muqit_Zoarder — Tue, 16 Aug 2016 12:54:47 GMT

Hello Wu, thanks, but i have solved that projection issue. But I cannot create the disperse markers correctly , now points (markers) are creating distant place, like 12 km away from actual place. Any solution?

Re: XY data projecttion problem

TieshengWu — Tue, 16 Aug 2016 13:32:01 GMT

Do you know the original long/lat's coordinate system? Maybe the data's GCS is not Deutsches Haupt... . can it be WGS84? There is several hundred meters of diffrence between them. Ask the data provider or try other GCS, and maybe it's not nessasery to change it to projected coordinate.

Re: XY data projecttion problem

NeilAyres — Tue, 16 Aug 2016 19:08:54 GMT

But that's why we think you have an incorrect original coordinate system

Re: XY data projecttion problem

TieshengWu — Tue, 16 Aug 2016 22:36:41 GMT

May you post some of x,y data?