Map display problem in Lambert projection

ashok_pydi · January 9, 2019, 7:27am

I am getting map display problem when I zoom out my map and using Lambert projection in Thinkgeo Desktop edition.

My internal and external projections are follows

Internal - +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs
External - +proj=lcc +lat_1=15 +lat_2=55 +lat_0=40 +lon_0=108 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs

Actually I am using different projections based on place on map to show Flight Route.

But by default at some zoom level I am getting correct display, but after zooming out map not displaying correctly. Please check following snapshots

Correct one

Wrong one

Please check the issue and give me solution for this.
Thanks,
Ashok

Ethan · January 10, 2019, 6:42am

Hi Ashok,

It looks for your projection the shape get strange result in the area near arctic.

In fact each projection have it’s valid extent, if the shape out of this extent, the result will be strange. I want to make sure your projection but failed to search it, could you please let me know its epsg number so I can double check its valid extent?

Regards,

Ethan